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If the world had adopted the proposal widely endorsed at the end of the ’80s — a freezing of carbon emissions, with a reduction of 20 percent by 2005 — warming could have been held to less than 1.5 degrees.

Action had to be taken, and the United States would need to lead. It didn’t.

There can be no understanding of our current and future predicament without understanding why we failed to solve this problem when we had the chance.

The first suggestion to Rafe Pomerance that humankind was destroying the conditions necessary for its own survival came on Page 66 of the government publication EPA-600/7-78-019. It was a technical report about coal

‘This Is the Whole Banana’ Spring 1979

here was an urgent problem that demanded their attention, MacDonald believed, because human civilization faced an existential crisis. In “How to Wreck the Environment,” a 1968 essay published while he was a science adviser to Lyndon Johnson, MacDonald predicted a near future in which “nuclear weapons were effectively banned and the weapons of mass destruction were those of environmental catastrophe.” One of the most potentially devastating such weapons, he believed, was the gas that we exhaled with every breath: carbon dioxide. By vastly increasing carbon emissions, the world’s most advanced militaries could alter weather patterns and wreak famine, drought and economic collapse.

the Jasons. They were like one of those teams of superheroes with complementary powers that join forces in times of galactic crisis. They had been brought together by federal agencies, including the C.I.A, to devise scientific solutions to national-security problems: how to detect an incoming missile; how to predict fallout from a nuclear bomb; how to develop unconventional weapons, like plague-infested rats.

Agle pointed to an article about a prominent geophysicist named Gordon MacDonald, who was conducting a study on climate change with the Jasons, the mysterious coterie of elite scientists to which he belonged

During the spring of 1977 and the summer of 1978, the Jasons met to determine what would happen once the concentration of carbon dioxide in the atmosphere doubled from pre-Industrial Revolution levels. It was an arbitrary milestone, the doubling, but a useful one, as its inevitability was not in question; the threshold would most likely be breached by 2035.

The Jasons’ report to the Department of Energy, “The Long-Term Impact of Atmospheric Carbon Dioxide on Climate,” was written in an understated tone that only enhanced its nightmarish findings: Global temperatures would increase by an average of two to three degrees Celsius; Dust Bowl conditions would “threaten large areas of North America, Asia and Africa”; access to drinking water and agricultural production would fall, triggering mass migration on an unprecedented scale. “Perhaps the most ominous feature,” however, was the effect of a changing climate on the poles. Even a minimal warming “could lead to rapid melting” of the West Antarctic ice sheet. The ice sheet contained enough water to raise the level of the oceans 16 feet.

MacDonald explained that he first studied the carbon-dioxide issue when he was about Pomerance’s age — in 1961, when he served as an adviser to John F. Kennedy. Pomerance pieced together that MacDonald, in his youth, had been something of a prodigy: In his 20s, he advised Dwight D. Eisenhower on space exploration; at 32, he became a member of the National Academy of Sciences; at 40, he was appointed to the inaugural Council on Environmental Quality, where he advised Richard Nixon on the environmental dangers of burning coal. He monitored the carbon-dioxide problem the whole time, with increasing alarm.

They were surprised to learn how few senior officials were familiar with the Jasons’ findings, let alone understood the ramifications of global warming. At last, having worked their way up the federal hierarchy, the two went to see the president’s top scientist, Frank Press.

Thus began the Gordon and Rafe carbon-dioxide roadshow. Beginning in the spring of 1979, Pomerance arranged informal briefings with the E.P.A., the National Security Council, The New York Times, the Council on Environmental Quality and the Energy Department, which, Pomerance learned, had established an Office of Carbon Dioxide Effects two years earlier at MacDonald’s urging

. Out of respect for MacDonald, Press had summoned to their meeting what seemed to be the entire senior staff of the president’s Office of Science and Technology Policy — the officials consulted on every critical matter of energy and national security. What Pomerance had expected to be yet another casual briefing assumed the character of a high-level national-security meeting.

MacDonald would begin his presentation by going back more than a century to John Tyndall — an Irish physicist who was an early champion of Charles Darwin’s work and died after being accidentally poisoned by his wife. In 1859, Tyndall found that carbon dioxide absorbed heat and that variations in the composition of the atmosphere could create changes in climate. These findings inspired Svante Arrhenius, a Swedish chemist and future Nobel laureate, to deduce in 1896 that the combustion of coal and petroleum could raise global temperatures. This warming would become noticeable in a few centuries, Arrhenius calculated, or sooner if consumption of fossil fuels continued to increase.

Four decades later, a British steam engineer named Guy Stewart Callendar discovered that, at the weather stations he observed, the previous five years were the hottest in recorded history. Humankind, he wrote in a paper, had become “able to speed up the processes of Nature.” That was in 1939.

MacDonald’s history concluded with Roger Revelle, perhaps the most distinguished of the priestly caste of government scientists who, since the Manhattan Project, advised every president on major policy; he had been a close colleague of MacDonald and Press since they served together under Kennedy. In a 1957 paper written with Hans Suess, Revelle concluded that “human beings are now carrying out a large-scale geophysical experiment of a kind that could not have happened in the past nor be reproduced in the future.” Revelle helped the Weather Bureau establish a continuous measurement of atmospheric carbon dioxide at a site perched near the summit of Mauna Loa on the Big Island of Hawaii, 11,500 feet above the sea — a rare pristine natural laboratory on a planet blanketed by fossil-fuel emissions.

After nearly a decade of observation, Revelle had shared his concerns with Lyndon Johnson, who included them in a special message to Congress two weeks after his inauguration. Johnson explained that his generation had “altered the composition of the atmosphere on a global scale” through the burning of fossil fuels, and his administration commissioned a study of the subject by his Science Advisory Committee. Revelle was its chairman, and its 1965 executive report on carbon dioxide warned of the rapid melting of Antarctica, rising seas, increased acidity of fresh waters — changes that would require no less than a coordinated global effort to forestall.Yet emissions continued to rise, and at this rate, MacDonald warned, they could see a snowless New England, the swamping of major coastal cities, as much as a 40 percent decline in national wheat production, the forced migration of about one-quarter of the world’s population. Not within centuries — within their own lifetimes.

On May 22, Press wrote a letter to the president of the National Academy of Sciences requesting a full assessment of the carbon-dioxide issue. Jule Charney, the father of modern meteorology, would gather the nation’s top oceanographers, atmospheric scientists and climate modelers to judge whether MacDonald’s alarm was justified — whether the world was, in fact, headed to cataclysm.

If Charney’s group confirmed that the world was careering toward an existential crisis, the president would be forced to act.

Hansen turned from the moon to Venus. Why, he tried to determine, was its surface so hot? In 1967, a Soviet satellite beamed back the answer: The planet’s atmosphere was mainly carbon dioxide. Though once it may have had habitable temperatures, it was believed to have succumbed to a runaway greenhouse effect: As the sun grew brighter, Venus’s ocean began to evaporate, thickening the atmosphere, which forced yet greater evaporation — a self-perpetuating cycle that finally boiled off the ocean entirely and heated the planet’s surface to more than 800 degrees Fahrenheit

At the other extreme, Mars’s thin atmosphere had insufficient carbon dioxide to trap much heat at all, leaving it about 900 degrees colder. Earth lay in the middle, its Goldilocks greenhouse effect just strong enough to support life.

We want to learn more about Earth’s climate, Jim told Anniek — and how humanity can influence it. He would use giant new supercomputers to map the planet’s atmosphere. They would create Mirror Worlds: parallel realities that mimicked our own. These digital simulacra, technically called “general circulation models,” combined the mathematical formulas that governed the behavior of the sea, land and sky into a single computer model. Unlike the real world, they could be sped forward to reveal the future.

The government officials, many of them scientists themselves, tried to suppress their awe of the legends in their presence: Henry Stommel, the world’s leading oceanographer; his protégé, Carl Wunsch, a Jason; the Manhattan Project alumnus Cecil Leith; the Harvard planetary physicist Richard Goody. These were the men who, in the last three decades, had discovered foundational principles underlying the relationships among sun, atmosphere, land and ocean — which is to say, the climate.

When, at Charney’s request, Hansen programmed his model to consider a future of doubled carbon dioxide, it predicted a temperature increase of four degrees Celsius. That was twice as much warming as the prediction made by the most prominent climate modeler, Syukuro Manabe, whose government lab at Princeton was the first to model the greenhouse effect. The difference between the two predictions — between warming of two degrees Celsius and four degrees Celsius — was the difference between damaged coral reefs and no reefs whatsoever, between thinning forests and forests enveloped by desert, between catastrophe and chaos.

The discrepancy between the models, Arakawa concluded, came down to ice and snow. The whiteness of the world’s snowfields reflected light; if snow melted in a warmer climate, less radiation would escape the atmosphere, leading to even greater warming. Shortly before dawn, Arakawa concluded that Manabe had given too little weight to the influence of melting sea ice, while Hansen had overemphasized it. The best estimate lay in between. Which meant that the Jasons’ calculation was too optimistic. When carbon dioxide doubled in 2035 or thereabouts, global temperatures would increase between 1.5 and 4.5 degrees Celsius, with the most likely outcome a warming of three degrees.

within the highest levels of the federal government, the scientific community and the oil-and-gas industry — within the commonwealth of people who had begun to concern themselves with the future habitability of the planet — the Charney report would come to have the authority of settled fact. It was the summation of all the predictions that had come before, and it would withstand the scrutiny of the decades that followed it. Charney’s group had considered everything known about ocean, sun, sea, air and fossil fuels and had distilled it to a single number: three. When the doubling threshold was broached, as appeared inevitable, the world would warm three degrees Celsius

The last time the world was three degrees warmer was during the Pliocene, three million years ago, when beech trees grew in Antarctica, the seas were 80 feet higher and horses galloped across the Canadian coast of the Arctic Ocean.

After the publication of the Charney report, Exxon decided to create its own dedicated carbon-dioxide research program, with an annual budget of $600,000. Only Exxon was asking a slightly different question than Jule Charney. Exxon didn’t concern itself primarily with how much the world would warm. It wanted to know how much of the warming Exxon could be blamed for.

“It behooves us to start a very aggressive defensive program,” Shaw wrote in a memo to a manager, “because there is a good probability that legislation affecting our business will be passed.”

Shaw turned to Wallace Broecker, a Columbia University oceanographer who was the second author of Roger Revelle’s 1965 carbon-dioxide report for Lyndon Johnson. In 1977, in a presentation at the American Geophysical Union, Broecker predicted that fossil fuels would have to be restricted, whether by taxation or fiat. More recently, he had testified before Congress, calling carbon dioxide “the No.1 long-term environmental problem.” If presidents and senators trusted Broecker to tell them the bad news, he was good enough for Exxon.

The company had been studying the carbon-dioxide problem for decades, since before it changed its name to Exxon. In 1957, scientists from Humble Oil published a study tracking “the enormous quantity of carbon dioxide” contributed to the atmosphere since the Industrial Revolution “from the combustion of fossil fuels.” Even then, the observation that burning fossil fuels had increased the concentration of carbon in the atmosphere was well understood and accepted by Humble’s scientists.

The American Petroleum Institute, the industry’s largest trade association, asked the same question in 1958 through its air-pollution study group and replicated the findings made by Humble Oil. So did another A.P.I. study conducted by the Stanford Research Institute a decade later, in 1968, which concluded that the burning of fossil fuels would bring “significant temperature changes” by the year 2000 and ultimately “serious worldwide environmental changes,” including the melting of the Antarctic ice cap and rising seas.

The ritual repeated itself every few years. Industry scientists, at the behest of their corporate bosses, reviewed the problem and found good reasons for alarm and better excuses to do nothing. Why should they act when almost nobody within the United States government — nor, for that matter, within the environmental movement — seemed worried?

Why take on an intractable problem that would not be detected until this generation of employees was safely retired? Worse, the solutions seemed more punitive than the problem itself. Historically, energy use had correlated to economic growth — the more fossil fuels we burned, the better our lives became. Why mess with that?

That June, Jimmy Carter signed the Energy Security Act of 1980, which directed the National Academy of Sciences to start a multiyear, comprehensive study, to be called “Changing Climate,” that would analyze social and economic effects of climate change. More urgent, the National Commission on Air Quality, at the request of Congress, invited two dozen experts, including Henry Shaw himself, to a meeting in Florida to propose climate policy.

On April 3, 1980, Senator Paul Tsongas, a Massachusetts Democrat, held the first congressional hearing on carbon-dioxide buildup in the atmosphere. Gordon MacDonald testified that the United States should “take the initiative” and develop, through the United Nations, a way to coordinate every nation’s energy policies to address the problem.

During the expansion of the Clean Air Act, he pushed for the creation of the National Commission on Air Quality, charged with ensuring that the goals of the act were being met. One such goal was a stable global climate. The Charney report had made clear that goal was not being met, and now the commission wanted to hear proposals for legislation. It was a profound responsibility, and the two dozen experts invited to the Pink Palace — policy gurus, deep thinkers, an industry scientist and an environmental activist — had only three days to achieve it, but the utopian setting made everything seem possible

We have less time than we realize, said an M.I.T. nuclear engineer named David Rose, who studied how civilizations responded to large technological crises. “People leave their problems until the 11th hour, the 59th minute,” he said. “And then: ‘Eloi, Eloi, Lama Sabachthani?’ ” — “My God, my God, why hast thou forsaken me?”

The attendees seemed to share a sincere interest in finding solutions. They agreed that some kind of international treaty would ultimately be needed to keep atmospheric carbon dioxide at a safe level. But nobody could agree on what that level was.

William Elliott, a NOAA scientist, introduced some hard facts: If the United States stopped burning carbon that year, it would delay the arrival of the doubling threshold by only five years. If Western nations somehow managed to stabilize emissions, it would forestall the inevitable by only eight years. The only way to avoid the worst was to stop burning coal. Yet China, the Soviet Union and the United States, by far the world’s three largest coal producers, were frantically accelerating extraction.

“Do we have a problem?” asked Anthony Scoville, a congressional science consultant. “We do, but it is not the atmospheric problem. It is the political problem.” He doubted that any scientific report, no matter how ominous its predictions, would persuade politicians to act.

The talk of ending oil production stirred for the first time the gentleman from Exxon. “I think there is a transition period,” Henry Shaw said. “We are not going to stop burning fossil fuels and start looking toward solar or nuclear fusion and so on. We are going to have a very orderly transition from fossil fuels to renewable energy sources.”

What if the problem was that they were thinking of it as a problem? “What I am saying,” Scoville continued, “is that in a sense we are making a transition not only in energy but the economy as a whole.” Even if the coal and oil industries collapsed, renewable technologies like solar energy would take their place. Jimmy Carter was planning to invest $80 billion in synthetic fuel. “My God,” Scoville said, “with $80 billion, you could have a photovoltaics industry going that would obviate the need for synfuels forever!”

nobody could agree what to do. John Perry, a meteorologist who had worked as a staff member on the Charney report, suggested that American energy policy merely “take into account” the risks of global warming, though he acknowledged that a nonbinding measure might seem “intolerably stodgy.” “It is so weak,” Pomerance said, the air seeping out of him, “as to not get us anywhere.”

Scoville pointed out that the United States was responsible for the largest share of global carbon emissions. But not for long. “If we’re going to exercise leadership,” he said, “the opportunity is now.

One way to lead, he proposed, would be to classify carbon dioxide as a pollutant under the Clean Air Act and regulate it as such. This was received by the room like a belch. By Scoville’s logic, every sigh was an act of pollution. Did the science really support such an extreme measure? The Charney report did exactly that, Pomerance said.

Slade, the director of the Energy Department’s carbon-dioxide program, considered the lag a saving grace. If changes did not occur for a decade or more, he said, those in the room couldn’t be blamed for failing to prevent them. So what was the problem?

“Call it whatever.” Besides, Pomerance added, they didn’t have to ban coal tomorrow. A pair of modest steps could be taken immediately to show the world that the United States was serious: the implementation of a carbon tax and increased investment in renewable energy. Then the United States could organize an international summit meeting to address climate change

these two dozen experts, who agreed on the major points and had made a commitment to Congress, could not draft a single paragraph. Hours passed in a hell of fruitless negotiation, self-defeating proposals and impulsive speechifying. Pomerance and Scoville pushed to include a statement calling for the United States to “sharply accelerate international dialogue,” but they were sunk by objections and caveats.

They never got to policy proposals. They never got to the second paragraph. The final statement was signed by only the moderator, who phrased it more weakly than the declaration calling for the workshop in the first place. “The guide I would suggest,” Jorling wrote, “is whether we know enough not to recommend changes in existing policy.”

Pomerance had seen enough. A consensus-based strategy would not work — could not work — without American leadership. And the United States wouldn’t act unless a strong leader persuaded it to do so — someone who would speak with authority about the science, demand action from those in power and risk everything in pursuit of justice.

The meeting ended Friday morning. On Tuesday, four days later, Ronald Reagan was elected president.

‘Otherwise, They’ll Gurgle’ November 1980-September 1981

In the midst of this carnage, the Council on Environmental Quality submitted a report to the White House warning that fossil fuels could “permanently and disastrously” alter Earth’s atmosphere, leading to “a warming of the Earth, possibly with very serious effects.” Reagan did not act on the council’s advice. Instead, his administration considered eliminating the council.

After the election, Reagan considered plans to close the Energy Department, increase coal production on federal land and deregulate surface coal mining. Once in office, he appointed James Watt, the president of a legal firm that fought to open public lands to mining and drilling, to run the Interior Department. “We’re deliriously happy,” the president of the National Coal Association was reported to have said. Reagan preserved the E.P.A. but named as its administrator Anne Gorsuch, an anti-regulation zealot who proceeded to cut the agency’s staff and budget by about a quarter

Reagan “has declared open war on solar energy,” the director of the nation’s lead solar-energy research agency said, after he was asked to resign). Reagan appeared determined to reverse the environmental achievements of Jimmy Carter, before undoing those of Richard Nixon, Lyndon Johnson, John F. Kennedy and, if he could get away with it, Theodore Roosevelt.

When Reagan considered closing the Council on Environmental Quality, its acting chairman, Malcolm Forbes Baldwin, wrote to the vice president and the White House chief of staff begging them to reconsider; in a major speech the same week, “A Conservative’s Program for the Environment,” Baldwin argued that it was “time for today’s conservatives explicitly to embrace environmentalism.” Environmental protection was not only good sense. It was good business. What could be more conservative than an efficient use of resources that led to fewer federal subsidies?

Meanwhile the Charney report continued to vibrate at the periphery of public consciousness. Its conclusions were confirmed by major studies from the Aspen Institute, the International Institute for Applied Systems Analysis near Vienna and the American Association for the Advancement of Science. Every month or so, nationally syndicated articles appeared summoning apocalypse: “Another Warning on ‘Greenhouse Effect,’ ” “Global Warming Trend ‘Beyond Human Experience,’ ” “Warming Trend Could ‘Pit Nation Against Nation.’

Pomerance read on the front page of The New York Times on Aug. 22, 1981, about a forthcoming paper in Science by a team of seven NASA scientists. They had found that the world had already warmed in the past century. Temperatures hadn’t increased beyond the range of historical averages, but the scientists predicted that the warming signal would emerge from the noise of routine weather fluctuations much sooner than previously expected. Most unusual of all, the paper ended with a policy recommendation: In the coming decades, the authors wrote, humankind should develop alternative sources of energy and use fossil fuels only “as necessary.” The lead author was James Hansen.

Pomerance listened and watched. He understood Hansen’s basic findings well enough: Earth had been warming since 1880, and the warming would reach “almost unprecedented magnitude” in the next century, leading to the familiar suite of terrors, including the flooding of a 10th of New Jersey and a quarter of Louisiana and Florida. But Pomerance was excited to find that Hansen could translate the complexities of atmospheric science into plain English.

7. ‘We’re All Going to Be the Victims’ March 1982

Gore had learned about climate change a dozen years earlier as an undergraduate at Harvard, when he took a class taught by Roger Revelle. Humankind was on the brink of radically transforming the global atmosphere, Revelle explained, drawing Keeling’s rising zigzag on the blackboard, and risked bringing about the collapse of civilization. Gore was stunned: Why wasn’t anyone talking about this?

Most in Congress considered the science committee a legislative backwater, if they considered it at all; this made Gore’s subcommittee, which had no legislative authority, an afterthought to an afterthought. That, Gore vowed, would change. Environmental and health stories had all the elements of narrative drama: villains, victims and heroes. In a hearing, you could summon all three, with the chairman serving as narrator, chorus and moral authority. He told his staff director that he wanted to hold a hearing every week.

The Revelle hearing went as Grumbly had predicted. The urgency of the issue was lost on Gore’s older colleagues, who drifted in and out while the witnesses testified. There were few people left by the time the Brookings Institution economist Lester Lave warned that humankind’s profligate exploitation of fossil fuels posed an existential test to human nature. “Carbon dioxide stands as a symbol now of our willingness to confront the future,” he said. “It will be a sad day when we decide that we just don’t have the time or thoughtfulness to address those issues.”

That night, the news programs featured the resolution of the baseball strike, the ongoing budgetary debate and the national surplus of butter.

There emerged, despite the general comity, a partisan divide. Unlike the Democrats, the Republicans demanded action. “Today I have a sense of déjà vu,” said Robert Walker, a Republican from Pennsylvania. In each of the last five years, he said, “we have been told and told and told that there is a problem with the increasing carbon dioxide in the atmosphere. We all accept that fact, and we realize that the potential consequences are certainly major in their impact on mankind.” Yet they had failed to propose a single law. “Now is the time,” he said. “The research is clear. It is up to us now to summon the political will.”

Hansen flew to Washington to testify on March 25, 1982, performing before a gallery even more thinly populated than at Gore’s first hearing on the greenhouse effect. Gore began by attacking the Reagan administration for cutting funding for carbon-dioxide research despite the “broad consensus in the scientific community that the greenhouse effect is a reality.” William Carney, a Republican from New York, bemoaned the burning of fossil fuels and argued passionately that science should serve as the basis for legislative policy

the experts invited by Gore agreed with the Republicans: The science was certain enough. Melvin Calvin, a Berkeley chemist who won the Nobel Prize for his work on the carbon cycle, said that it was useless to wait for stronger evidence of warming. “You cannot do a thing about it when the signals are so big that they come out of the noise,” he said. “You have to look for early warning signs.”

Hansen’s job was to share the warning signs, to translate the data into plain English. He explained a few discoveries that his team had made — not with computer models but in libraries. By analyzing records from hundreds of weather stations, he found that the surface temperature of the planet had already increased four-tenths of a degree Celsius in the previous century. Data from several hundred tide-gauge stations showed that the oceans had risen four inches since the 1880s

It occurred to Hansen that this was the only political question that mattered: How long until the worst began? It was not a question on which geophysicists expended much effort; the difference between five years and 50 years in the future was meaningless in geologic time. Politicians were capable of thinking only in terms of electoral time: six years, four years, two years. But when it came to the carbon problem, the two time schemes were converging.

“Within 10 or 20 years,” Hansen said, “we will see climate changes which are clearly larger than the natural variability.” James Scheuer wanted to make sure he understood this correctly. No one else had predicted that the signal would emerge that quickly. “If it were one or two degrees per century,” he said, “that would be within the range of human adaptability. But we are pushing beyond the range of human adaptability.” “Yes,” Hansen said.

How soon, Scheuer asked, would they have to change the national model of energy production? Hansen hesitated — it wasn’t a scientific question. But he couldn’t help himself. He had been irritated, during the hearing, by all the ludicrous talk about the possibility of growing more trees to offset emissions. False hopes were worse than no hope at all: They undermined the prospect of developing real solutions. “That time is very soon,” Hansen said finally. “My opinion is that it is past,” Calvin said, but he was not heard because he spoke from his seat. He was told to speak into the microphone. “It is already later,” Calvin said, “than you think.”

From Gore’s perspective, the hearing was an unequivocal success. That night Dan Rather devoted three minutes of “CBS Evening News” to the greenhouse effect. A correspondent explained that temperatures had increased over the previous century, great sheets of pack ice in Antarctica were rapidly melting, the seas were rising; Calvin said that “the trend is all in the direction of an impending catastrophe”; and Gore mocked Reagan for his shortsightedness. Later, Gore could take credit for protecting the Energy Department’s carbon-dioxide program, which in the end was largely preserved.

8. ‘The Direction of an Impending Catastrophe’ 1982

Following Henry Shaw’s recommendation to establish credibility ahead of any future legislative battles, Exxon had begun to spend conspicuously on global-warming research. It donated tens of thousands of dollars to some of the most prominent research efforts, including one at Woods Hole led by the ecologist George Woodwell, who had been calling for major climate policy as early as the mid-1970s, and an international effort coordinated by the United Nations. Now Shaw offered to fund the October 1982 symposium on climate change at Columbia’s Lamont-Doherty campus.

David boasted that Exxon would usher in a new global energy system to save the planet from the ravages of climate change. He went so far as to argue that capitalism’s blind faith in the wisdom of the free market was “less than satisfying” when it came to the greenhouse effect. Ethical considerations were necessary, too. He pledged that Exxon would revise its corporate strategy to account for climate change, even if it were not “fashionable” to do so. As Exxon had already made heavy investments in nuclear and solar technology, he was “generally upbeat” that Exxon would “invent” a future of renewable energy.

Hansen had reason to feel upbeat himself. If the world’s largest oil-and-gas company supported a new national energy model, the White House would not stand in its way. The Reagan administration was hostile to change from within its ranks. But it couldn’t be hostile to Exxon.

The carbon-dioxide issue was beginning to receive major national attention — Hansen’s own findings had become front-page news, after all. What started as a scientific story was turning into a political story.

The political realm was itself a kind of Mirror World, a parallel reality that crudely mimicked our own. It shared many of our most fundamental laws, like the laws of gravity and inertia and publicity. And if you applied enough pressure, the Mirror World of politics could be sped forward to reveal a new future. Hansen was beginning to understand that too.

1. ‘Caution, Not Panic’ 1983-1984

in the fall of 1983, the climate issue entered an especially long, dark winter. And all because of a single report that had done nothing to change the state of climate science but transformed the state of climate politics.

After the publication of the Charney report in 1979, Jimmy Carter had directed the National Academy of Sciences to prepare a comprehensive, $1 million analysis of the carbon-dioxide problem: a Warren Commission for the greenhouse effect. A team of scientist-dignitaries — among them Revelle, the Princeton modeler Syukuro Manabe and the Harvard political economist Thomas Schelling, one of the intellectual architects of Cold War game theory — would review the literature, evaluate the consequences of global warming for the world order and propose remedies

Then Reagan won the White House.

the incipient report served as the Reagan administration’s answer to every question on the subject. There could be no climate policy, Fred Koomanoff and his associates said, until the academy ruled. In the Mirror World of the Reagan administration, the warming problem hadn’t been abandoned at all. A careful, comprehensive solution was being devised. Everyone just had to wait for the academy’s elders to explain what it was.

The committee’s chairman, William Nierenberg — a Jason, presidential adviser and director of Scripps, the nation’s pre-eminent oceanographic institution — argued that action had to be taken immediately, before all the details could be known with certainty, or else it would be too late.

Better to bet on American ingenuity to save the day. Major interventions in national energy policy, taken immediately, might end up being more expensive, and less effective, than actions taken decades in the future, after more was understood about the economic and social consequences of a warmer planet. Yes, the climate would change, mostly for the worst, but future generations would be better equipped to change with it.

Government officials who knew Nierenberg were not surprised by his conclusions: He was an optimist by training and experience, a devout believer in the doctrine of American exceptionalism, one of the elite class of scientists who had helped the nation win a global war, invent the most deadly weapon conceivable and create the booming aerospace and computer industries. America had solved every existential problem it had confronted over the previous generation; it would not be daunted by an excess of carbon dioxide. Nierenberg had also served on Reagan’s transition team. Nobody believed that he had been directly influenced by his political connections, but his views — optimistic about the saving graces of market forces, pessimistic about the value of government regulation — reflected all the ardor of his party.

That’s what Nierenberg wrote in “Changing Climate.” But it’s not what he said in the press interviews that followed. He argued the opposite: There was no urgent need for action. The public should not entertain the most “extreme negative speculations” about climate change (despite the fact that many of those speculations appeared in his report). Though “Changing Climate” urged an accelerated transition to renewable fuels, noting that it would take thousands of years for the atmosphere to recover from the damage of the last century, Nierenberg recommended “caution, not panic.” Better to wait and see

The damage of “Changing Climate” was squared by the amount of attention it received. Nierenberg’s speech in the Great Hall, being one-500th the length of the actual assessment, received 500 times the press coverage. As The Wall Street Journal put it, in a line echoed by trade journals across the nation: “A panel of top scientists has some advice for people worried about the much-publicized warming of the Earth’s climate: You can cope.”

On “CBS Evening News,” Dan Rather said the academy had given “a cold shoulder” to a grim, 200-page E.P.A. assessment published earlier that week (titled “Can We Delay a Greenhouse Warming?”; the E.P.A.’s answer, reduced to a word, was no). The Washington Post described the two reports, taken together, as “clarion calls to inaction.

George Keyworth II, Reagan’s science adviser. Keyworth used Nierenberg’s optimism as reason to discount the E.P.A.’s “unwarranted and unnecessarily alarmist” report and warned against taking any “near-term corrective action” on global warming. Just in case it wasn’t clear, Keyworth added, “there are no actions recommended other than continued research.”

Edward David Jr., two years removed from boasting of Exxon’s commitment to transforming global energy policy, told Science that the corporation had reconsidered. “Exxon has reverted to being mainly a supplier of conventional hydrocarbon fuels — petroleum products, natural gas and steam coal,” David said. The American Petroleum Institute canceled its own carbon-dioxide research program, too.

Exxon soon revised its position on climate-change research. In a presentation at an industry conference, Henry Shaw cited “Changing Climate” as evidence that “the general consensus is that society has sufficient time to technologically adapt to a CO₂ greenhouse effect.” If the academy had concluded that regulations were not a serious option, why should Exxon protest

2. ‘You Scientists Win’ 1985

3. The Size of The Human Imagination Spring-Summer 1986

Curtis Moore’s proposal: Use ozone to revive climate. The ozone hole had a solution — an international treaty, already in negotiation. Why not hitch the milk wagon to the bullet train? Pomerance was skeptical. The problems were related, sure: Without a reduction in CFC emissions, you didn’t have a chance of averting cataclysmic global warming. But it had been difficult enough to explain the carbon issue to politicians and journalists; why complicate the sales pitch? Then again, he didn’t see what choice he had. The Republicans controlled the Senate, and Moore was his connection to the Senate’s environmental committee.

Pomerance met with Senator John Chafee, a Republican from Rhode Island, and helped persuade him to hold a double-barreled hearing on the twin problems of ozone and carbon dioxide on June 10 and 11, 1986

F.Sherwood Rowland, Robert Watson, a NASA scientist, and Richard Benedick, the administration’s lead representative in international ozone negotiations, would discuss ozone; James Hansen, Al Gore, the ecologist George Woodwell and Carl Wunsch, a veteran of the Charney group, would testify about climate change.

As Pomerance had hoped, fear about the ozone layer ensured a bounty of press coverage for the climate-change testimony. But as he had feared, it caused many people to conflate the two crises. One was Peter Jennings, who aired the video on ABC’s “World News Tonight,” warning that the ozone hole “could lead to flooding all over the world, also to drought and to famine.”

The confusion helped: For the first time since the “Changing Climate” report, global-warming headlines appeared by the dozen. William Nierenberg’s “caution, not panic” line was inverted. It was all panic without a hint of caution: “A Dire Forecast for ‘Greenhouse’ Earth” (the front page of The Washington Post); “Scientists Predict Catastrophes in Growing Global Heat Wave” (Chicago Tribune); “Swifter Warming of Globe Foreseen” (The New York Times).

After three years of backsliding and silence, Pomerance was exhilarated to see interest in the issue spike overnight. Not only that: A solution materialized, and a moral argument was passionately articulated — by Rhode Island’s Republican senator no less. “Ozone depletion and the greenhouse effect can no longer be treated solely as important scientific questions,” Chafee said. “They must be seen as critical problems facing the nations of the world, and they are problems that demand solutions.”

The old canard about the need for more research was roundly mocked — by Woodwell, by a W.R.I. colleague named Andrew Maguire, by Senator George Mitchell, a Democrat from Maine. “Scientists are never 100 percent certain,” the Princeton historian Theodore Rabb testified. “That notion of total certainty is something too elusive ever to be sought.” As Pomerance had been saying since 1979, it was past time to act. Only now the argument was so broadly accepted that nobody dared object.

The ozone hole, Pomerance realized, had moved the public because, though it was no more visible than global warming, people could be made to see it. They could watch it grow on video. Its metaphors were emotionally wrought: Instead of summoning a glass building that sheltered plants from chilly weather (“Everything seems to flourish in there”), the hole evoked a violent rending of the firmament, inviting deathly radiation. Americans felt that their lives were in danger. An abstract, atmospheric problem had been reduced to the size of the human imagination. It had been made just small enough, and just large enough, to break through.

Four years after “Changing Climate,” two years after a hole had torn open the firmament and a month after the United States and more than three dozen other nations signed a treaty to limit use of CFCs, the climate-change corps was ready to celebrate. It had become conventional wisdom that climate change would follow ozone’s trajectory. Reagan’s E.P.A. administrator, Lee M. Thomas, said as much the day he signed the Montreal Protocol on Substances That Deplete the Ozone Layer (the successor to the Vienna Convention), telling reporters that global warming was likely to be the subject of a future international agreement

Congress had already begun to consider policy — in 1987 alone, there were eight days of climate hearings, in three committees, across both chambers of Congress; Senator Joe Biden, a Delaware Democrat, had introduced legislation to establish a national climate-change strategy. And so it was that Jim Hansen found himself on Oct. 27 in the not especially distinguished ballroom of the Quality Inn on New Jersey Avenue, a block from the Capitol, at “Preparing for Climate Change,” which was technically a conference but felt more like a wedding.

John Topping was an old-line Rockefeller Republican, a Commerce Department lawyer under Nixon and an E.P.A. official under Reagan. He first heard about the climate problem in the halls of the E.P.A. in 1982 and sought out Hansen, who gave him a personal tutorial. Topping was amazed to discover that out of the E.P.A.’s 13,000-person staff, only seven people, by his count, were assigned to work on climate, though he figured it was more important to the long-term security of the nation than every other environmental issue combined.

Glancing around the room, Jim Hansen could chart, like an arborist counting rings on a stump, the growth of the climate issue over the decade. Veterans like Gordon MacDonald, George Woodwell and the environmental biologist Stephen Schneider stood at the center of things. Former and current staff members from the congressional science committees (Tom Grumbly, Curtis Moore, Anthony Scoville) made introductions to the congressmen they advised. Hansen’s owlish nemesis Fred Koomanoff was present, as were his counterparts from the Soviet Union and Western Europe. Rafe Pomerance’s cranium could be seen above the crowd, but unusually he was surrounded by colleagues from other environmental organizations that until now had shown little interest in a diffuse problem with no proven fund-raising record. The party’s most conspicuous newcomers, however, the outermost ring, were the oil-and-gas executives.

That evening, as a storm spat and coughed outside, Rafe Pomerance gave one of his exhortative speeches urging cooperation among the various factions, and John Chafee and Roger Revelle received awards; introductions were made and business cards earnestly exchanged. Not even a presentation by Hansen of his research could sour the mood. The next night, on Oct. 28, at a high-spirited dinner party in Topping’s townhouse on Capitol Hill, the oil-and-gas men joked with the environmentalists, the trade-group representatives chatted up the regulators and the academics got merrily drunk. Mikhail Budyko, the don of the Soviet climatologists, settled into an extended conversation about global warming with Topping’s 10-year-old son. It all seemed like the start of a grand bargain, a uniting of factions — a solution.

Hansen was accustomed to the bureaucratic nuisances that attended testifying before Congress; before a hearing, he had to send his formal statement to NASA headquarters, which forwarded it to the White House’s Office of Management and Budget for approval. “Major greenhouse climate changes are a certainty,” he had written. “By the 2010s [in every scenario], essentially the entire globe has very substantial warming.”

By all appearances, plans for major policy continued to advance rapidly. After the Johnston hearing, Timothy Wirth, a freshman Democratic senator from Colorado on the energy committee, began to plan a comprehensive package of climate-change legislation — a New Deal for global warming. Wirth asked a legislative assistant, David Harwood, to consult with experts on the issue, beginning with Rafe Pomerance, in the hope of converting the science of climate change into a new national energy policy.

In March 1988, Wirth joined 41 other senators, nearly half of them Republicans, to demand that Reagan call for an international treaty modeled after the ozone agreement. Because the United States and the Soviet Union were the world’s two largest contributors of carbon emissions, responsible for about one-third of the world total, they should lead the negotiations. Reagan agreed. In May, he signed a joint statement with Mikhail Gorbachev that included a pledge to cooperate on global warming.

Al Gore himself had, for the moment, withdrawn his political claim to the issue. In 1987, at the age of 39, Gore announced that he was running for president, in part to bring attention to global warming, but he stopped emphasizing it after the subject failed to captivate New Hampshire primary voters.

5. ‘You Will See Things That You Shall Believe’ Summer 1988

It was the hottest and driest summer in history. Everywhere you looked, something was bursting into flames. Two million acres in Alaska incinerated, and dozens of major fires scored the West. Yellowstone National Park lost nearly one million acres. Smoke was visible from Chicago, 1,600 miles away.

In Nebraska, suffering its worst drought since the Dust Bowl, there were days when every weather station registered temperatures above 100 degrees. The director of the Kansas Department of Health and Environment warned that the drought might be the dawning of a climatic change that within a half century could turn the state into a desert.

On June 22 in Washington, where it hit 100 degrees, Rafe Pomerance received a call from Jim Hansen, who was scheduled to testify the following morning at a Senate hearing called by Timothy Wirth. “I hope we have good media coverage tomorrow,” Hansen said.

Hansen had just received the most recent global temperature data. Just over halfway into the year, 1988 was setting records. Already it had nearly clinched the hottest year in history. Ahead of schedule, the signal was emerging from the noise. “I’m going to make a pretty strong statement,” Hansen said.

Hansen returned to his testimony. He wrote: “The global warming is now large enough that we can ascribe with a high degree of confidence a cause-and-effect relationship to the greenhouse effect.” He wrote: “1988 so far is so much warmer than 1987, that barring a remarkable and improbable cooling, 1988 will be the warmest year on record.” He wrote: “The greenhouse effect has been detected, and it is changing our climate now.”

“We have only one planet,” Senator Bennett Johnston intoned. “If we screw it up, we have no place to go.” Senator Max Baucus, a Democrat from Montana, called for the United Nations Environment Program to begin preparing a global remedy to the carbon-dioxide problem. Senator Dale Bumpers, a Democrat of Arkansas, previewed Hansen’s testimony, saying that it “ought to be cause for headlines in every newspaper in America tomorrow morning.” The coverage, Bumpers emphasized, was a necessary precursor to policy. “Nobody wants to take on any of the industries that produce the things that we throw up into the atmosphere,” he said. “But what you have are all these competing interests pitted against our very survival.”

Hansen, wiping his brow, spoke without affect, his eyes rarely rising from his notes. The warming trend could be detected “with 99 percent confidence,” he said. “It is changing our climate now.” But he saved his strongest comment for after the hearing, when he was encircled in the hallway by reporters. “It is time to stop waffling so much,” he said, “and say that the evidence is pretty strong that the greenhouse effect is here.”

The press followed Bumpers’s advice. Hansen’s testimony prompted headlines in dozens of newspapers across the country, including The New York Times, which announced, across the top of its front page: “Global Warming Has Begun, Expert Tells Senate.”

Rafe Pomerance called his allies on Capitol Hill, the young staff members who advised politicians, organized hearings, wrote legislation. We need to finalize a number, he told them, a specific target, in order to move the issue — to turn all this publicity into policy. The Montreal Protocol had called for a 50 percent reduction in CFC emissions by 1998. What was the right target for carbon emissions? It wasn’t enough to exhort nations to do better. That kind of talk might sound noble, but it didn’t change investments or laws. They needed a hard goal — something ambitious but reasonable. And they needed it soon: Just four days after Hansen’s star turn, politicians from 46 nations and more than 300 scientists would convene in Toronto at the World Conference on the Changing Atmosphere, an event described by Philip Shabecoff of The New York Times as “Woodstock for climate change.”

Pomerance had a proposal: a 20 percent reduction in carbon emissions by 2000. Ambitious, Harwood said. In all his work planning climate policy, he had seen no assurance that such a steep drop in emissions was possible. Then again, 2000 was more than a decade off, so it allowed for some flexibility.

Mintzer pointed out that a 20 percent reduction was consistent with the academic literature on energy efficiency. Various studies over the years had shown that you could improve efficiency in most energy systems by roughly 20 percent if you adopted best practices.

Of course, with any target, you had to take into account the fact that the developing world would inevitably consume much larger quantities of fossil fuels by 2000. But those gains could be offset by a wider propagation of the renewable technologies already at hand — solar, wind, geothermal. It was not a rigorous scientific analysis, Mintzer granted, but 20 percent sounded plausible. We wouldn’t need to solve cold fusion or ask Congress to repeal the law of gravity. We could manage it with the knowledge and technology we already had.

Besides, Pomerance said, 20 by 2000 sounds good.

The conference’s final statement, signed by all 400 scientists and politicians in attendance, repeated the demand with a slight variation: a 20 percent reduction in carbon emissions by 2005. Just like that, Pomerance’s best guess became global diplomatic policy.

Hansen, emerging from Anniek’s successful cancer surgery, took it upon himself to start a one-man public information campaign. He gave news conferences and was quoted in seemingly every article about the issue; he even appeared on television with homemade props. Like an entrant at an elementary-school science fair, he made “loaded dice” out of sections of cardboard and colored paper to illustrate the increased likelihood of hotter weather in a warmer climate. Public awareness of the greenhouse effect reached a new high of 68 percent

global warming became a major subject of the presidential campaign. While Michael Dukakis proposed tax incentives to encourage domestic oil production and boasted that coal could satisfy the nation’s energy needs for the next three centuries, George Bush took advantage. “I am an environmentalist,” he declared on the shore of Lake Erie, the first stop on a five-state environmental tour that would take him to Boston Harbor, Dukakis’s home turf. “Those who think we are powerless to do anything about the greenhouse effect,” he said, “are forgetting about the White House effect.”

His running mate emphasized the ticket’s commitment to the issue at the vice-presidential debate. “The greenhouse effect is an important environmental issue,” Dan Quayle said. “We need to get on with it. And in a George Bush administration, you can bet that we will.”

This kind of talk roused the oil-and-gas men. “A lot of people on the Hill see the greenhouse effect as the issue of the 1990s,” a gas lobbyist told Oil & Gas Journal. Before a meeting of oil executives shortly after the “environmentalist” candidate won the election, Representative Dick Cheney, a Wyoming Republican, warned, “It’s going to be very difficult to fend off some kind of gasoline tax.” The coal industry, which had the most to lose from restrictions on carbon emissions, had moved beyond denial to resignation. A spokesman for the National Coal Association acknowledged that the greenhouse effect was no longer “an emerging issue. It is here already, and we’ll be hearing more and more about it.”

By the end of the year, 32 climate bills had been introduced in Congress, led by Wirth’s omnibus National Energy Policy Act of 1988. Co-sponsored by 13 Democrats and five Republicans, it established as a national goal an “International Global Agreement on the Atmosphere by 1992,” ordered the Energy Department to submit to Congress a plan to reduce energy use by at least 2 percent a year through 2005 and directed the Congressional Budget Office to calculate the feasibility of a carbon tax. A lawyer for the Senate energy committee told an industry journal that lawmakers were “frightened” by the issue and predicted that Congress would eventually pass significant legislation after Bush took office

The other great powers refused to wait. The German Parliament created a special commission on climate change, which concluded that action had to be taken immediately, “irrespective of any need for further research,” and that the Toronto goal was inadequate; it recommended a 30 percent reduction of carbon emissions

Margaret Thatcher, who had studied chemistry at Oxford, warned in a speech to the Royal Society that global warming could “greatly exceed the capacity of our natural habitat to cope” and that “the health of the economy and the health of our environment are totally dependent upon each other.”

The prime ministers of Canada and Norway called for a binding international treaty on the atmosphere; Sweden’s Parliament went further, announcing a national strategy to stabilize emissions at the 1988 level and eventually imposing a carbon tax

the United Nations unanimously endorsed the establishment, by the World Meteorological Organization and the United Nations Environment Program, of an Intergovernmental Panel on Climate Change, composed of scientists and policymakers, to conduct scientific assessments and develop global climate policy.

One of the I.P.C.C.’s first sessions to plan an international treaty was hosted by the State Department, 10 days after Bush’s inauguration. James Baker chose the occasion to make his first speech as secretary of state. “We can probably not afford to wait until all of the uncertainties about global climate change have been resolved,” he said. “Time will not make the problem go away.”

: On April 14, 1989, a bipartisan group of 24 senators, led by the majority leader, George Mitchell, requested that Bush cut emissions in the United States even before the I.P.C.C.’s working group made its recommendation. “We cannot afford the long lead times associated with a comprehensive global agreement,” the senators wrote. Bush had promised to combat the greenhouse effect with the White House effect. The self-proclaimed environmentalist was now seated in the Oval Office. It was time.

8. ‘You Never Beat The White House’ April 1989

After Jim Baker gave his boisterous address to the I.P.C.C. working group at the State Department, he received a visit from John Sununu, Bush’s chief of staff. Leave the science to the scientists, Sununu told Baker. Stay clear of this greenhouse-effect nonsense. You don’t know what you’re talking about. Baker, who had served as Reagan’s chief of staff, didn’t speak about the subject again.

despite his reputation as a political wolf, he still thought of himself as a scientist — an “old engineer,” as he was fond of putting it, having earned a Ph.D. in mechanical engineering from M.I.T. decades earlier. He lacked the reflexive deference that so many of his political generation reserved for the class of elite government scientists.

Since World War II, he believed, conspiratorial forces had used the imprimatur of scientific knowledge to advance an “anti-growth” doctrine. He reserved particular disdain for Paul Ehrlich’s “The Population Bomb,” which prophesied that hundreds of millions of people would starve to death if the world took no step to curb population growth; the Club of Rome, an organization of European scientists, heads of state and economists, which similarly warned that the world would run out of natural resources; and as recently as the mid-’70s, the hypothesis advanced by some of the nation’s most celebrated scientists — including Carl Sagan, Stephen Schneider and Ichtiaque Rasool — that a new ice age was dawning, thanks to the proliferation of man-made aerosols. All were theories of questionable scientific merit, portending vast, authoritarian remedies to halt economic progress.

When Mead talked about “far-reaching” decisions and “long-term consequences,” Sununu heard the marching of jackboots.

Sununu had suspected that the greenhouse effect belonged to this nefarious cabal since 1975, when the anthropologist Margaret Mead convened a symposium on the subject at the National Institute of Environmental Health Sciences.

While Sununu and Darman reviewed Hansen’s statements, the E.P.A. administrator, William K. Reilly, took a new proposal to the White House. The next meeting of the I.P.C.C.’s working group was scheduled for Geneva the following month, in May; it was the perfect occasion, Reilly argued, to take a stronger stand on climate change. Bush should demand a global treaty to reduce carbon emissions.

Sununu wouldn’t budge. He ordered the American delegates not to make any commitment in Geneva. Very soon after that, someone leaked the exchange to the press.

A deputy of Jim Baker pulled Reilly aside. He said he had a message from Baker, who had observed Reilly’s infighting with Sununu. “In the long run,” the deputy warned Reilly, “you never beat the White House.”

9. ‘A Form of Science Fraud’ May 1989

The cameras followed Hansen and Gore into the marbled hallway. Hansen insisted that he wanted to focus on the science. Gore focused on the politics. “I think they’re scared of the truth,” he said. “They’re scared that Hansen and the other scientists are right and that some dramatic policy changes are going to be needed, and they don’t want to face up to it.”

The censorship did more to publicize Hansen’s testimony and the dangers of global warming than anything he could have possibly said. At the White House briefing later that morning, Press Secretary Marlin Fitzwater admitted that Hansen’s statement had been changed. He blamed an official “five levels down from the top” and promised that there would be no retaliation. Hansen, he added, was “an outstanding and distinguished scientist” and was “doing a great job.”

10. The White House Effect Fall 1989

The Los Angeles Times called the censorship “an outrageous assault.” The Chicago Tribune said it was the beginning of “a cold war on global warming,” and The New York Times warned that the White House’s “heavy-handed intervention sends the signal that Washington wants to go slow on addressing the greenhouse problem.”

Darman went to see Sununu. He didn’t like being accused of censoring scientists. They needed to issue some kind of response. Sununu called Reilly to ask if he had any ideas. We could start, Reilly said, by recommitting to a global climate treaty. The United States was the only Western nation on record as opposing negotiations.

Sununu sent a telegram to Geneva endorsing a plan “to develop full international consensus on necessary steps to prepare for a formal treaty-negotiating process. The scope and importance of this issue are so great that it is essential for the U.S. to exercise leadership.”

Sununu seethed at any mention of the subject. He had taken it upon himself to study more deeply the greenhouse effect; he would have a rudimentary, one-dimensional general circulation model installed on his personal desktop computer. He decided that the models promoted by Jim Hansen were a lot of bunk. They were horribly imprecise in scale and underestimated the ocean’s ability to mitigate warming. Sununu complained about Hansen to D. Allan Bromley, a nuclear physicist from Yale who, at Sununu’s recommendation, was named Bush’s science adviser. Hansen’s findings were “technical poppycock” that didn’t begin to justify such wild-eyed pronouncements that “the greenhouse effect is here” or that the 1988 heat waves could be attributed to global warming, let alone serve as the basis for national economic policy.

When a junior staff member in the Energy Department, in a meeting at the White House with Sununu and Reilly, mentioned an initiative to reduce fossil-fuel use, Sununu interrupted her. “Why in the world would you need to reduce fossil-fuel use?” he asked. “Because of climate change,” the young woman replied. “I don’t want anyone in this administration without a scientific background using ‘climate change’ or ‘global warming’ ever again,” he said. “If you don’t have a technical basis for policy, don’t run around making decisions on the basis of newspaper headlines.” After the meeting, Reilly caught up to the staff member in the hallway. She was shaken. Don’t take it personally, Reilly told her. Sununu might have been looking at you, but that was directed at me.

Reilly, for his part, didn’t entirely blame Sununu for Bush’s indecision on the prospect of a climate treaty. The president had never taken a vigorous interest in global warming and was mainly briefed about it by nonscientists. Bush had brought up the subject on the campaign trail, in his speech about the White House effect, after leafing through a briefing booklet for a new issue that might generate some positive press. When Reilly tried in person to persuade him to take action, Bush deferred to Sununu and Baker. Why don’t the three of you work it out, he said. Let me know when you decide

Relations between Sununu and Reilly became openly adversarial. Reilly, Sununu thought, was a creature of the environmental lobby. He was trying to impress his friends at the E.P.A. without having a basic grasp of the science himself.

Pomerance had the sinking feeling that the momentum of the previous year was beginning to flag. The censoring of Hansen’s testimony and the inexplicably strident opposition from John Sununu were ominous signs. So were the findings of a report Pomerance had commissioned, published in September by the World Resources Institute, tracking global greenhouse-gas emissions. The United States was the largest contributor by far, producing nearly a quarter of the world’s carbon emissions, and its contribution was growing faster than that of every other country. Bush’s indecision, or perhaps inattention, had already managed to delay the negotiation of a global climate treaty until 1990 at the earliest, perhaps even 1991. By then, Pomerance worried, it would be too late.

Pomerance tried to be more diplomatic. “The president made a commitment to the American people to deal with global warming,” he told The Washington Post, “and he hasn’t followed it up.” He didn’t want to sound defeated. “There are some good building blocks here,” Pomerance said, and he meant it. The Montreal Protocol on CFCs wasn’t perfect at first, either — it had huge loopholes and weak restrictions. Once in place, however, the restrictions could be tightened. Perhaps the same could happen with climate change. Perhaps. Pomerance was not one for pessimism. As William Reilly told reporters, dutifully defending the official position forced upon him, it was the first time that the United States had formally endorsed the concept of an emissions limit. Pomerance wanted to believe that this was progress.

All week in Noordwijk, Becker couldn’t stop talking about what he had seen in Zeeland. After a flood in 1953, when the sea swallowed much of the region, killing more than 2,000 people, the Dutch began to build the Delta Works, a vast concrete-and-steel fortress of movable barriers, dams and sluice gates — a masterpiece of human engineering. The whole system could be locked into place within 90 minutes, defending the land against storm surge. It reduced the country’s exposure to the sea by 700 kilometers, Becker explained. The United States coastline was about 153,000 kilometers long. How long, he asked, was the entire terrestrial coastline? Because the whole world was going to need this. In Zeeland, he said, he had seen the future.

Ken Caldeira, a climate scientist at the Carnegie Institution for Science in Stanford, Calif., has a habit of asking new graduate students to name the largest fundamental breakthrough in climate physics since 1979. It’s a trick question. There has been no breakthrough. As with any mature scientific discipline, there is only refinement. The computer models grow more precise; the regional analyses sharpen; estimates solidify into observational data. Where there have been inaccuracies, they have tended to be in the direction of understatement.

More carbon has been released into the atmosphere since the final day of the Noordwijk conference, Nov. 7, 1989, than in the entire history of civilization preceding it

Despite every action taken since the Charney report — the billions of dollars invested in research, the nonbinding treaties, the investments in renewable energy — the only number that counts, the total quantity of global greenhouse gas emitted per year, has continued its inexorable rise.

When it comes to our own nation, which has failed to make any binding commitments whatsoever, the dominant narrative for the last quarter century has concerned the efforts of the fossil-fuel industries to suppress science, confuse public knowledge and bribe politicians.

The mustache-twirling depravity of these campaigns has left the impression that the oil-and-gas industry always operated thus; while the Exxon scientists and American Petroleum Institute clerics of the ’70s and ’80s were hardly good Samaritans, they did not start multimillion-dollar disinformation campaigns, pay scientists to distort the truth or try to brainwash children in elementary schools, as their successors would.

It was James Hansen’s testimony before Congress in 1988 that, for the first time since the “Changing Climate” report, made oil-and-gas executives begin to consider the issue’s potential to hurt their profits. Exxon, as ever, led the field. Six weeks after Hansen’s testimony, Exxon’s manager of science and strategy development, Duane LeVine, prepared an internal strategy paper urging the company to “emphasize the uncertainty in scientific conclusions.” This shortly became the default position of the entire sector. LeVine, it so happened, served as chairman of the global petroleum industry’s Working Group on Global Climate Change, created the same year, which adopted Exxon’s position as its own

The American Petroleum Institute, after holding a series of internal briefings on the subject in the fall and winter of 1988, including one for the chief executives of the dozen or so largest oil companies, took a similar, if slightly more diplomatic, line. It set aside money for carbon-dioxide policy — about $100,000, a fraction of the millions it was spending on the health effects of benzene, but enough to establish a lobbying organization called, in an admirable flourish of newspeak, the Global Climate Coalition.

The G.C.C. was conceived as a reactive body, to share news of any proposed regulations, but on a whim, it added a press campaign, to be coordinated mainly by the A.P.I. It gave briefings to politicians known to be friendly to the industry and approached scientists who professed skepticism about global warming. The A.P.I.’s payment for an original op-ed was $2,000.

It was joined by the U.S. Chamber of Commerce and 14 other trade associations, including those representing the coal, electric-grid and automobile industries

In October 1989, scientists allied with the G.C.C. began to be quoted in national publications, giving an issue that lacked controversy a convenient fulcrum. “Many respected scientists say the available evidence doesn’t warrant the doomsday warnings,” was the caveat that began to appear in articles on climate change.

The following year, when President Bill Clinton proposed an energy tax in the hope of meeting the goals of the Rio treaty, the A.P.I. invested $1.8 million in a G.C.C. disinformation campaign. Senate Democrats from oil-and-coal states joined Republicans to defeat the tax proposal, which later contributed to the Republicans’ rout of Democrats in the midterm congressional elections in 1994 — the first time the Republican Party had won control of both houses in 40 years

The G.C.C. spent $13 million on a single ad campaign intended to weaken support for the 1997 Kyoto Protocol, which committed its parties to reducing greenhouse-gas emissions by 5 percent relative to 1990 levels. The Senate, which would have had to ratify the agreement, took a pre-emptive vote declaring its opposition; the resolution passed 95-0. There has never been another serious effort to negotiate a binding global climate treaty.

. This has made the corporation an especially vulnerable target for the wave of compensatory litigation that began in earnest in the last three years and may last a generation. Tort lawsuits have become possible only in recent years, as scientists have begun more precisely to attribute regional effects to global emission levels. This is one subfield of climate science that has advanced significantly sin

Pomerance had not been among the 400 delegates invited to Noordwijk. But together with three young activists — Daniel Becker of the Sierra Club, Alden Meyer of the Union of Concerned Scientists and Stewart Boyle from Friends of the Earth — he had formed his own impromptu delegation. Their constituency, they liked to say, was the climate itself. Their mission was to pressure the delegates to include in the final conference statement, which would be used as the basis for a global treaty, the target proposed in Toronto: a 20 percent reduction of greenhouse-gas combustion by 2005. It was the only measure that mattered, the amount of emissions reductions, and the Toronto number was the strongest global target yet proposed.

The delegations would review the progress made by the I.P.C.C. and decide whether to endorse a framework for a global treaty. There was a general sense among the delegates that they would, at minimum, agree to the target proposed by the host, the Dutch environmental minister, more modest than the Toronto number: a freezing of greenhouse-gas emissions at 1990 levels by 2000. Some believed that if the meeting was a success, it would encourage the I.P.C.C. to accelerate its negotiations and reach a decision about a treaty sooner. But at the very least, the world’s environmental ministers should sign a statement endorsing a hard, binding target of emissions reductions. The mood among the delegates was electric, nearly giddy — after more than a decade of fruitless international meetings, they could finally sign an agreement that meant something.

11. ‘The Skunks at The Garden Party’ November 1989

It was nearly freezing — Nov. 6, 1989, on the coast of the North Sea in the Dutch resort town of Noordwijk

Losing Earth: The Decade WeAlmost Stopped Climate Change We knew everything we needed to know, and nothing stood in our way. Nothing, that is, except ourselves. A tragedy in two acts. By Nathaniel RichPhotographs and Videos by George Steinmetz AUG. 1, 2018

The most revealing false claim: The flu mortality rate

VirusesAwareness of Ebola in 2014Comparing the coronavirus outbreak with the Ebola situation of 2014, Trump said, "At that time, nobody had ever even heard of Ebola." -- February 25 press conference in New Delhi, India "Nobody knew anything about it. Nobody had ever heard of anything like this." -- February 26 coronavirus press conference Facts First: Some Americans certainly didn't know a whole lot about Ebola before 2014, but the claims that "nobody" had ever even heard of Ebola and that "nobody" knew anything about it are absurd. Ebola was discovered in 1976. It had been the subject of considerable media coverage in the next three decades, not to mention scientific study.

Gupta, CNN chief medical correspondent, told Trump at a press conference, "Mr. President, you talked about the flu and then in comparison to the coronavirus. The flu has a fatality ratio of about 0.1%." Trump said, "Correct." But Trump later disputed the figure, saying, "And the flu is higher than that. The flu is much higher than that." -- February 26 coronavirus press conferenceFacts First: Even if Trump meant that the flu has a "much higher" fatality rate than 0.1% -- rather than meaning that the flu's mortality rate is "much higher" than that of the novel coronavirus -- he was wrong. The mortality rate for seasonal flu is "about 0.1%, 0.2% at the most," Fauci, director of the National Institute of Allergy and Infectious Diseases at the National Institutes of Health -- who appeared with Trump at this same news conference -- told this to USA Today in mid-February, echoing the comments of other experts and Centers for Disease Control and Prevention data since 2010.

Obama’s resistance to direct intervention only grew. After several months of deliberation, he authorized the CIA to train and fund Syrian rebels, but he also shared the outlook of his former defense secretary, Robert Gates, who had routinely asked in meetings, “Shouldn’t we finish up the two wars we have before we look for another?”

In his first term, he came to believe that only a handful of threats in the Middle East conceivably warranted direct U.S. military intervention. These included the threat posed by al‑Qaeda; threats to the continued existence of Israel (“It would be a moral failing for me as president of the United States” not to defend Israel, he once told me); and, not unrelated to Israel’s security, the threat posed by a nuclear-armed Iran.

Bush and Scowcroft removed Saddam Hussein’s army from Kuwait in 1991, and they deftly managed the disintegration of the Soviet Union; Scowcroft also, on Bush’s behalf, toasted the leaders of China shortly after the slaughter in Tiananmen Square.

As Obama was writing his campaign manifesto, The Audacity of Hope, in 2006, Susan Rice, then an informal adviser, felt it necessary to remind him to include at least one line of praise for the foreign policy of President Bill Clinton, to partially balance the praise he showered on Bush and Scowcroft.

“When you have a professional army,” he once told me, “that is well armed and sponsored by two large states”—Iran and Russia—“who have huge stakes in this, and they are fighting against a farmer, a carpenter, an engineer who started out as protesters and suddenly now see themselves in the midst of a civil conflict …” He paused. “The notion that we could have—in a clean way that didn’t commit U.S. military forces—changed the equation on the ground there was never true.”

The message Obama telegraphed in speeches and interviews was clear: He would not end up like the second President Bush—a president who became tragically overextended in the Middle East, whose decisions filled the wards of Walter Reed with grievously wounded soldiers, who was helpless to stop the obliteration of his reputation, even when he recalibrated his policies in his second term. Obama would say privately that the first task of an American president in the post-Bush international arena was “Don’t do stupid shit.”

Hillary Clinton, when she was Obama’s secretary of state, argued for an early and assertive response to Assad’s violence. In 2014, after she left office, Clinton told me that “the failure to help build up a credible fighting force of the people who were the originators of the protests against Assad … left a big vacuum, which the jihadists have now filled.” When The Atlantic published this statement, and also published Clinton’s assessment that “great nations need organizing principles, and ‘Don’t do stupid stuff’ is not an organizing principle,” Obama became “rip-shit angry,” according to one of his senior advisers. The president did not understand how “Don’t do stupid shit” could be considered a controversial slogan.

The Iraq invasion, Obama believed, should have taught Democratic interventionists like Clinton, who had voted for its authorization, the dangers of doing stupid shit. (Clinton quickly apologized to Obama for her comments,

Obama, unlike liberal interventionists, is an admirer of the foreign-policy realism of President George H. W. Bush and, in particular, of Bush’s national-security adviser, Brent Scowcroft (“I love that guy,” Obama once told me).

The danger to the United States posed by the Assad regime did not rise to the level of these challenges.

Obama generally believes that the Washington foreign-policy establishment, which he secretly disdains, makes a fetish of “credibility”—particularly the sort of credibility purchased with force. The preservation of credibility, he says, led to Vietnam. Within the White House, Obama would argue that “dropping bombs on someone to prove that you’re willing to drop bombs on someone is just about the worst reason to use force.”

American national-security credibility, as it is conventionally understood in the Pentagon, the State Department, and the cluster of think tanks headquartered within walking distance of the White House, is an intangible yet potent force—one that, when properly nurtured, keeps America’s friends feeling secure and keeps the international order stable.

All week, White House officials had publicly built the case that Assad had committed a crime against humanity. Kerry’s speech would mark the culmination of this campaign.

But the president had grown queasy. In the days after the gassing of Ghouta, Obama would later tell me, he found himself recoiling from the idea of an attack unsanctioned by international law or by Congress. The American people seemed unenthusiastic about a Syria intervention; so too did one of the few foreign leaders Obama respects, Angela Merkel, the German chancellor. She told him that her country would not participate in a Syria campaign. And in a stunning development, on Thursday, August 29, the British Parliament denied David Cameron its blessing for an attack. John Kerry later told me that when he heard that, “internally, I went, Oops.”

Obama was also unsettled by a surprise visit early in the week from James Clapper, his director of national intelligence, who interrupted the President’s Daily Brief, the threat report Obama receives each morning from Clapper’s analysts, to make clear that the intelligence on Syria’s use of sarin gas, while robust, was not a “slam dunk.” He chose the term carefully. Clapper, the chief of an intelligence community traumatized by its failures in the run-up to the Iraq War, was not going to overpromise, in the manner of the onetime CIA director George Tenet, who famously guaranteed George W. Bush a “slam dunk” in Iraq.

While the Pentagon and the White House’s national-security apparatuses were still moving toward war (John Kerry told me he was expecting a strike the day after his speech), the president had come to believe that he was walking into a trap—one laid both by allies and by adversaries, and by conventional expectations of what an American president is supposed to do.

Late on Friday afternoon, Obama determined that he was simply not prepared to authorize a strike. He asked McDonough, his chief of staff, to take a walk with him on the South Lawn of the White House. Obama did not choose McDonough randomly: He is the Obama aide most averse to U.S. military intervention, and someone who, in the words of one of his colleagues, “thinks in terms of traps.” Obama, ordinarily a preternaturally confident man, was looking for validation, and trying to devise ways to explain his change of heart, both to his own aides and to the public

The third, and most important, factor, he told me, was “our assessment that while we could inflict some damage on Assad, we could not, through a missile strike, eliminate the chemical weapons themselves, and what I would then face was the prospect of Assad having survived the strike and claiming he had successfully defied the United States, that the United States had acted unlawfully in the absence of a UN mandate, and that that would have potentially strengthened his hand rather than weakened it.

Others had difficulty fathoming how the president could reverse himself the day before a planned strike. Obama, however, was completely calm. “If you’ve been around him, you know when he’s ambivalent about something, when it’s a 51–49 decision,” Ben Rhodes told me. “But he was completely at ease.”

Obama also shared with McDonough a long-standing resentment: He was tired of watching Washington unthinkingly drift toward war in Muslim countries. Four years earlier, the president believed, the Pentagon had “jammed” him on a troop surge for Afghanistan. Now, on Syria, he was beginning to feel jammed again.

The fourth factor, he said, was of deeper philosophical importance. “This falls in the category of something that I had been brooding on for some time,” he said. “I had come into office with the strong belief that the scope of executive power in national-security issues is very broad, but not limitless.”

Obama’s decision caused tremors across Washington as well. John McCain and Lindsey Graham, the two leading Republican hawks in the Senate, had met with Obama in the White House earlier in the week and had been promised an attack. They were angered by the about-face. Damage was done even inside the administration. Neither Chuck Hagel, then the secretary of defense, nor John Kerry was in the Oval Office when the president informed his team of his thinking. Kerry would not learn about the change until later that evening. “I just got fucked over,” he told a friend shortly after talking to the president that night. (When I asked Kerry recently about that tumultuous night, he said, “I didn’t stop to analyze it. I figured the president had a reason to make a decision and, honestly, I understood his notion.”)

The president asked Congress to authorize the use of force—the irrepressible Kerry served as chief lobbyist—and it quickly became apparent in the White House that Congress had little interest in a strike. When I spoke with Biden recently about the red-line decision, he made special note of this fact. “It matters to have Congress with you, in terms of your ability to sustain what you set out to do,” he said. Obama “didn’t go to Congress to get himself off the hook. He had his doubts at that point, but he knew that if he was going to do anything, he better damn well have the public with him, or it would be a very short ride.” Congress’s clear ambivalence convinced Biden that Obama was correct to fear the slippery slope. “What happens when we get a plane shot down? Do we not go in and rescue?,” Biden asked. “You need the support of the American people.”

At the G20 summit in St. Petersburg, which was held the week after the Syria reversal, Obama pulled Putin aside, he recalled to me, and told the Russian president “that if he forced Assad to get rid of the chemical weapons, that that would eliminate the need for us taking a military strike.” Within weeks, Kerry, working with his Russian counterpart, Sergey Lavrov, would engineer the removal of most of Syria’s chemical-weapons arsenal—a program whose existence Assad until then had refused to even acknowledge.

The arrangement won the president praise from, of all people, Benjamin Netanyahu, the Israeli prime minister, with whom he has had a consistently contentious relationship. The removal of Syria’s chemical-weapons stockpiles represented “the one ray of light in a very dark region,” Netanyahu told me not long after the deal was announced.

John Kerry today expresses no patience for those who argue, as he himself once did, that Obama should have bombed Assad-regime sites in order to buttress America’s deterrent capability. “You’d still have the weapons there, and you’d probably be fighting isil” for control of the weapons, he said, referring to the Islamic State, the terror group also known as isis. “It just doesn’t make sense. But I can’t deny to you that this notion about the red line being crossed and [Obama’s] not doing anything gained a life of its own.”

today that decision is a source of deep satisfaction for him.

“I’m very proud of this moment,” he told me. “The overwhelming weight of conventional wisdom and the machinery of our national-security apparatus had gone fairly far. The perception was that my credibility was at stake, that America’s credibility was at stake. And so for me to press the pause button at that moment, I knew, would cost me politically. And the fact that I was able to pull back from the immediate pressures and think through in my own mind what was in America’s interest, not only with respect to Syria but also with respect to our democracy, was as tough a decision as I’ve made—and I believe ultimately it was the right decision to make.”

By 2013, Obama’s resentments were well developed. He resented military leaders who believed they could fix any problem if the commander in chief would simply give them what they wanted, and he resented the foreign-policy think-tank complex. A widely held sentiment inside the White House is that many of the most prominent foreign-policy think tanks in Washington are doing the bidding of their Arab and pro-Israel funders. I’ve heard one administration official refer to Massachusetts Avenue, the home of many of these think tanks, as “Arab-occupied territory.”

over the past few months, I’ve spent several hours talking with him about the broadest themes of his “long game” foreign policy, including the themes he is most eager to discuss—namely, the ones that have nothing to do with the Middle East.

I have come to believe that, in Obama’s mind, August 30, 2013, was his liberation day, the day he defied not only the foreign-policy establishment and its cruise-missile playbook, but also the demands of America’s frustrating, high-maintenance allies in the Middle East—countries, he complains privately to friends and advisers, that seek to exploit American “muscle” for their own narrow and sectarian ends.

“Where am I controversial? When it comes to the use of military power,” he said. “That is the source of the controversy. There’s a playbook in Washington that presidents are supposed to follow. It’s a playbook that comes out of the foreign-policy establishment. And the playbook prescribes responses to different events, and these responses tend to be militarized responses. Where America is directly threatened, the playbook works. But the playbook can also be a trap that can lead to bad decisions. In the midst of an international challenge like Syria, you get judged harshly if you don’t follow the playbook, even if there are good reasons why it does not apply.”

For some foreign-policy experts, even within his own administration, Obama’s about-face on enforcing the red line was a dispiriting moment in which he displayed irresolution and naïveté, and did lasting damage to America’s standing in the world. “Once the commander in chief draws that red line,” Leon Panetta, who served as CIA director and then as secretary of defense in Obama’s first term, told me recently, “then I think the credibility of the commander in chief and this nation is at stake if he doesn’t enforce it.” Right after Obama’s reversal, Hillary Clinton said privately, “If you say you’re going to strike, you have to strike. There’s no choice.”

Obama’s defenders, however, argue that he did no damage to U.S. credibility, citing Assad’s subsequent agreement to have his chemical weapons removed. “The threat of force was credible enough for them to give up their chemical weapons,” Tim Kaine, a Democratic senator from Virginia, told me. “We threatened military action and they responded. That’s deterrent credibility.”

History may record August 30, 2013, as the day Obama prevented the U.S. from entering yet another disastrous Muslim civil war, and the day he removed the threat of a chemical attack on Israel, Turkey, or Jordan. Or it could be remembered as the day he let the Middle East slip from America’s grasp, into the hands of Russia, Iran, and isis

spoke with obama about foreign policy when he was a U.S. senator, in 2006. At the time, I was familiar mainly with the text of a speech he had delivered four years earlier, at a Chicago antiwar rally. It was an unusual speech for an antiwar rally in that it was not antiwar; Obama, who was then an Illinois state senator, argued only against one specific and, at the time, still theoretical, war. “I suffer no illusions about Saddam Hussein,” he said. “He is a brutal man. A ruthless man … But I also know that Saddam poses no imminent and direct threat to the United States or to his neighbors.” He added, “I know that an invasion of Iraq without a clear rationale and without strong international support will only fan the flames of the Middle East, and encourage the worst, rather than best, impulses of the Arab world, and strengthen the recruitment arm of al-Qaeda.”

This speech had made me curious about its author. I wanted to learn how an Illinois state senator, a part-time law professor who spent his days traveling between Chicago and Springfield, had come to a more prescient understanding of the coming quagmire than the most experienced foreign-policy thinkers of his party, including such figures as Hillary Clinton, Joe Biden, and John Kerry, not to mention, of course, most Republicans and many foreign-policy analysts and writers, including me.

This was the moment the president believes he finally broke with what he calls, derisively, the “Washington playbook.”

“isis is not an existential threat to the United States,” he told me in one of these conversations. “Climate change is a potential existential threat to the entire world if we don’t do something about it.” Obama explained that climate change worries him in particular because “it is a political problem perfectly designed to repel government intervention. It involves every single country, and it is a comparatively slow-moving emergency, so there is always something seemingly more urgent on the agenda.”

At the moment, of course, the most urgent of the “seemingly more urgent” issues is Syria. But at any given moment, Obama’s entire presidency could be upended by North Korean aggression, or an assault by Russia on a member of nato, or an isis-planned attack on U.S. soil. Few presidents have faced such diverse tests on the international stage as Obama has, and the challenge for him, as for all presidents, has been to distinguish the merely urgent from the truly important, and to focus on the important.

My goal in our recent conversations was to see the world through Obama’s eyes, and to understand what he believes America’s role in the world should be. This article is informed by our recent series of conversations, which took place in the Oval Office; over lunch in his dining room; aboard Air Force One; and in Kuala Lumpur during his most recent visit to Asia, in November. It is also informed by my previous interviews with him and by his speeches and prolific public ruminations, as well as by conversations with his top foreign-policy and national-security advisers, foreign leaders and their ambassadors in Washington, friends of the president and others who have spoken with him about his policies and decisions, and his adversaries and critics.

Over the course of our conversations, I came to see Obama as a president who has grown steadily more fatalistic about the constraints on America’s ability to direct global events, even as he has, late in his presidency, accumulated a set of potentially historic foreign-policy achievements—controversial, provisional achievements, to be sure, but achievements nonetheless: the opening to Cuba, the Paris climate-change accord, the Trans-Pacific Partnership trade agreement, and, of course, the Iran nuclear deal.

These he accomplished despite his growing sense that larger forces—the riptide of tribal feeling in a world that should have already shed its atavism; the resilience of small men who rule large countries in ways contrary to their own best interests; the persistence of fear as a governing human emotion—frequently conspire against the best of America’s intentions. But he also has come to learn, he told me, that very little is accomplished in international affairs without U.S. leadership.

Obama talked me through this apparent contradiction. “I want a president who has the sense that you can’t fix everything,” he said. But on the other hand, “if we don’t set the agenda, it doesn’t happen.” He explained what he meant. “The fact is, there is not a summit I’ve attended since I’ve been president where we are not setting the agenda, where we are not responsible for the key results,” he said. “That’s true whether you’re talking about nuclear security, whether you’re talking about saving the world financial system, whether you’re talking about climate.”

One day, over lunch in the Oval Office dining room, I asked the president how he thought his foreign policy might be understood by historians. He started by describing for me a four-box grid representing the main schools of American foreign-policy thought. One box he called isolationism, which he dismissed out of hand. “The world is ever-shrinking,” he said. “Withdrawal is untenable.” The other boxes he labeled realism, liberal interventionism, and internationalism. “I suppose you could call me a realist in believing we can’t, at any given moment, relieve all the world’s misery,” he said. “We have to choose where we can make a real impact.” He also noted that he was quite obviously an internationalist, devoted as he is to strengthening multilateral organizations and international norms.

If a crisis, or a humanitarian catastrophe, does not meet his stringent standard for what constitutes a direct national-security threat, Obama said, he doesn’t believe that he should be forced into silence. He is not so much the realist, he suggested, that he won’t pass judgment on other leaders.

Though he has so far ruled out the use of direct American power to depose Assad, he was not wrong, he argued, to call on Assad to go. “Oftentimes when you get critics of our Syria policy, one of the things that they’ll point out is ‘You called for Assad to go, but you didn’t force him to go. You did not invade.’ And the notion is that if you weren’t going to overthrow the regime, you shouldn’t have said anything. That’s a weird argument to me, the notion that if we use our moral authority to say ‘This is a brutal regime, and this is not how a leader should treat his people,’ once you do that, you are obliged to invade the country and install a government you prefer.”

“I am very much the internationalist,” Obama said in a later conversation. “And I am also an idealist insofar as I believe that we should be promoting values, like democracy and human rights and norms and values

“Having said that,” he continued, “I also believe that the world is a tough, complicated, messy, mean place, and full of hardship and tragedy. And in order to advance both our security interests and those ideals and values that we care about, we’ve got to be hardheaded at the same time as we’re bighearted, and pick and choose our spots, and recognize that there are going to be times where the best that we can do is to shine a spotlight on something that’s terrible, but not believe that we can automatically solve it. There are going to be times where our security interests conflict with our concerns about human rights. There are going to be times where we can do something about innocent people being killed, but there are going to be times where we can’t.”

If Obama ever questioned whether America really is the world’s one indispensable nation, he no longer does so. But he is the rare president who seems at times to resent indispensability, rather than embrace it.

“Free riders aggravate me,” he told me. Recently, Obama warned that Great Britain would no longer be able to claim a “special relationship” with the United States if it did not commit to spending at least 2 percent of its GDP on defense. “You have to pay your fair share,” Obama told David Cameron, who subsequently met the 2 percent threshold.

Part of his mission as president, Obama explained, is to spur other countries to take action for themselves, rather than wait for the U.S. to lead. The defense of the liberal international order against jihadist terror, Russian adventurism, and Chinese bullying depends in part, he believes, on the willingness of other nations to share the burden with the U.S

This is why the controversy surrounding the assertion—made by an anonymous administration official to The New Yorker during the Libya crisis of 2011—that his policy consisted of “leading from behind” perturbed him. “We don’t have to always be the ones who are up front,” he told me. “Sometimes we’re going to get what we want precisely because we are sharing in the agenda.

The president also seems to believe that sharing leadership with other countries is a way to check America’s more unruly impulses. “One of the reasons I am so focused on taking action multilaterally where our direct interests are not at stake is that multilateralism regulates hubris,”

He consistently invokes what he understands to be America’s past failures overseas as a means of checking American self-righteousness. “We have history,” he said. “We have history in Iran, we have history in Indonesia and Central America. So we have to be mindful of our history when we start talking about intervening, and understand the source of other people’s suspicions.”

In his efforts to off-load some of America’s foreign-policy responsibilities to its allies, Obama appears to be a classic retrenchment president in the manner of Dwight D. Eisenhower and Richard Nixon. Retrenchment, in this context, is defined as “pulling back, spending less, cutting risk, and shifting burdens to allies

One difference between Eisenhower and Nixon, on the one hand, and Obama, on the other, Sestanovich said, is that Obama “appears to have had a personal, ideological commitment to the idea that foreign policy had consumed too much of the nation’s attention and resources.”

But once he decides that a particular challenge represents a direct national-security threat, he has shown a willingness to act unilaterally. This is one of the larger ironies of the Obama presidency: He has relentlessly questioned the efficacy of force, but he has also become the most successful terrorist-hunter in the history of the presidency, one who will hand to his successor a set of tools an accomplished assassin would envy

“He applies different standards to direct threats to the U.S.,” Ben Rhodes says. “For instance, despite his misgivings about Syria, he has not had a second thought about drones.” Some critics argue he should have had a few second thoughts about what they see as the overuse of drones. But John Brennan, Obama’s CIA director, told me recently that he and the president “have similar views. One of them is that sometimes you have to take a life to save even more lives. We have a similar view of just-war theory. The president requires near-certainty of no collateral damage. But if he believes it is necessary to act, he doesn’t hesitate.”

Those who speak with Obama about jihadist thought say that he possesses a no-illusions understanding of the forces that drive apocalyptic violence among radical Muslims, but he has been careful about articulating that publicly, out of concern that he will exacerbate anti-Muslim xenophobia

He has a tragic realist’s understanding of sin, cowardice, and corruption, and a Hobbesian appreciation of how fear shapes human behavior. And yet he consistently, and with apparent sincerity, professes optimism that the world is bending toward justice. He is, in a way, a Hobbesian optimist.

The contradictions do not end there. Though he has a reputation for prudence, he has also been eager to question some of the long-standing assumptions undergirding traditional U.S. foreign-policy thinking. To a remarkable degree, he is willing to question why America’s enemies are its enemies, or why some of its friends are its friends.

It is assumed, at least among his critics, that Obama sought the Iran deal because he has a vision of a historic American-Persian rapprochement. But his desire for the nuclear agreement was born of pessimism as much as it was of optimism. “The Iran deal was never primarily about trying to open a new era of relations between the U.S. and Iran,” Susan Rice told me. “It was far more pragmatic and minimalist. The aim was very simply to make a dangerous country substantially less dangerous. No one had any expectation that Iran would be a more benign actor.”

once mentioned to obama a scene from The Godfather: Part III, in which Michael Corleone complains angrily about his failure to escape the grasp of organized crime. I told Obama that the Middle East is to his presidency what the Mob is to Corleone, and I started to quote the Al Pacino line: “Just when I thought I was out—”“It pulls you back in,” Obama said, completing the thought

When I asked Obama recently what he had hoped to accomplish with his Cairo reset speech, he said that he had been trying—unsuccessfully, he acknowledged—to persuade Muslims to more closely examine the roots of their unhappiness.“My argument was this: Let’s all stop pretending that the cause of the Middle East’s problems is Israel,” he told me. “We want to work to help achieve statehood and dignity for the Palestinians, but I was hoping that my speech could trigger a discussion, could create space for Muslims to address the real problems they are confronting—problems of governance, and the fact that some currents of Islam have not gone through a reformation that would help people adapt their religious doctrines to modernity. My thought was, I would communicate that the U.S. is not standing in the way of this progress, that we would help, in whatever way possible, to advance the goals of a practical, successful Arab agenda that provided a better life for ordinary people.”

But over the next three years, as the Arab Spring gave up its early promise, and brutality and dysfunction overwhelmed the Middle East, the president grew disillusioned. Some of his deepest disappointments concern Middle Eastern leaders themselves. Benjamin Netanyahu is in his own category: Obama has long believed that Netanyahu could bring about a two-state solution that would protect Israel’s status as a Jewish-majority democracy, but is too fearful and politically paralyzed to do so

Obama has also not had much patience for Netanyahu and other Middle Eastern leaders who question his understanding of the region. In one of Netanyahu’s meetings with the president, the Israeli prime minister launched into something of a lecture about the dangers of the brutal region in which he lives, and Obama felt that Netanyahu was behaving in a condescending fashion, and was also avoiding the subject at hand: peace negotiations. Finally, the president interrupted the prime minister: “Bibi, you have to understand something,” he said. “I’m the African American son of a single mother, and I live here, in this house. I live in the White House. I managed to get elected president of the United States. You think I don’t understand what you’re talking about, but I do.”

Other leaders also frustrate him immensely. Early on, Obama saw Recep Tayyip Erdoğan, the president of Turkey, as the sort of moderate Muslim leader who would bridge the divide between East and West—but Obama now considers him a failure and an authoritarian, one who refuses to use his enormous army to bring stability to Syria

In recent days, the president has taken to joking privately, “All I need in the Middle East is a few smart autocrats.” Obama has always had a fondness for pragmatic, emotionally contained technocrats, telling aides, “If only everyone could be like the Scandinavians, this would all be easy.”

The unraveling of the Arab Spring darkened the president’s view of what the U.S. could achieve in the Middle East, and made him realize how much the chaos there was distracting from other priorities. “The president recognized during the course of the Arab Spring that the Middle East was consuming us,”

But what sealed Obama’s fatalistic view was the failure of his administration’s intervention in Libya, in 2011

Obama says today of the intervention, “It didn’t work.” The U.S., he believes, planned the Libya operation carefully—and yet the country is still a disaster.

“So we actually executed this plan as well as I could have expected: We got a UN mandate, we built a coalition, it cost us $1 billion—which, when it comes to military operations, is very cheap. We averted large-scale civilian casualties, we prevented what almost surely would have been a prolonged and bloody civil conflict. And despite all that, Libya is a mess.”

Mess is the president’s diplomatic term; privately, he calls Libya a “shit show,” in part because it’s subsequently become an isis haven—one that he has already targeted with air strikes. It became a shit show, Obama believes, for reasons that had less to do with American incompetence than with the passivity of America’s allies and with the obdurate power of tribalism.

Of France, he said, “Sarkozy wanted to trumpet the flights he was taking in the air campaign, despite the fact that we had wiped out all the air defenses and essentially set up the entire infrastructure” for the intervention. This sort of bragging was fine, Obama said, because it allowed the U.S. to “purchase France’s involvement in a way that made it less expensive for us and less risky for us.” In other words, giving France extra credit in exchange for less risk and cost to the United States was a useful trade-off—except that “from the perspective of a lot of the folks in the foreign-policy establishment, well, that was terrible. If we’re going to do something, obviously we’ve got to be up front, and nobody else is sharing in the spotlight.”

Obama also blamed internal Libyan dynamics. “The degree of tribal division in Libya was greater than our analysts had expected. And our ability to have any kind of structure there that we could interact with and start training and start providing resources broke down very quickly.”

Libya proved to him that the Middle East was best avoided. “There is no way we should commit to governing the Middle East and North Africa,” he recently told a former colleague from the Senate. “That would be a basic, fundamental mistake.”

Obama did not come into office preoccupied by the Middle East. He is the first child of the Pacific to become president—born in Hawaii, raised there and, for four years, in Indonesia—and he is fixated on turning America’s attention to Asia

For Obama, Asia represents the future. Africa and Latin America, in his view, deserve far more U.S. attention than they receive. Europe, about which he is unromantic, is a source of global stability that requires, to his occasional annoyance, American hand-holding. And the Middle East is a region to be avoided—one that, thanks to America’s energy revolution, will soon be of negligible relevance to the U.S. economy.

Advisers recall that Obama would cite a pivotal moment in The Dark Knight, the 2008 Batman movie, to help explain not only how he understood the role of isis, but how he understood the larger ecosystem in which it grew. “There’s a scene in the beginning in which the gang leaders of Gotham are meeting,” the president would say. “These are men who had the city divided up. They were thugs, but there was a kind of order. Everyone had his turf. And then the Joker comes in and lights the whole city on fire. isil is the Joker. It has the capacity to set the whole region on fire. That’s why we have to fight it.”

The rise of the Islamic State deepened Obama’s conviction that the Middle East could not be fixed—not on his watch, and not for a generation to come.

The traveling White House press corps was unrelenting: “Isn’t it time for your strategy to change?” one reporter asked. This was followed by “Could I ask you to address your critics who say that your reluctance to enter another Middle East war, and your preference of diplomacy over using the military, makes the United States weaker and emboldens our enemies?” And then came this imperishable question, from a CNN reporter: “If you’ll forgive the language—why can’t we take out these bastards?” Which was followed by “Do you think you really understand this enemy well enough to defeat them and to protect the homeland?”

This rhetoric appeared to frustrate Obama immensely. “When I hear folks say that, well, maybe we should just admit the Christians but not the Muslims; when I hear political leaders suggesting that there would be a religious test for which person who’s fleeing from a war-torn country is admitted,” Obama told the assembled reporters, “that’s not American. That’s not who we are. We don’t have religious tests to our compassion.”

he has never believed that terrorism poses a threat to America commensurate with the fear it generates. Even during the period in 2014 when isis was executing its American captives in Syria, his emotions were in check. Valerie Jarrett, Obama’s closest adviser, told him people were worried that the group would soon take its beheading campaign to the U.S. “They’re not coming here to chop our heads off,” he reassured her.

Obama frequently reminds his staff that terrorism takes far fewer lives in America than handguns, car accidents, and falls in bathtubs do

Several years ago, he expressed to me his admiration for Israelis’ “resilience” in the face of constant terrorism, and it is clear that he would like to see resilience replace panic in American society. Nevertheless, his advisers are fighting a constant rearguard action to keep Obama from placing terrorism in what he considers its “proper” perspective, out of concern that he will seem insensitive to the fears of the American people.

When I noted to Kerry that the president’s rhetoric doesn’t match his, he said, “President Obama sees all of this, but he doesn’t gin it up into this kind of—he thinks we are on track. He has escalated his efforts. But he’s not trying to create hysteria … I think the president is always inclined to try to keep things on an appropriate equilibrium. I respect that.”

Obama modulates his discussion of terrorism for several reasons: He is, by nature, Spockian. And he believes that a misplaced word, or a frightened look, or an ill-considered hyperbolic claim, could tip the country into panic. The sort of panic he worries about most is the type that would manifest itself in anti-Muslim xenophobia or in a challenge to American openness and to the constitutional order.

The president also gets frustrated that terrorism keeps swamping his larger agenda, particularly as it relates to rebalancing America’s global priorities. For years, the “pivot to Asia” has been a paramount priority of his. America’s economic future lies in Asia, he believes, and the challenge posed by China’s rise requires constant attention. From his earliest days in office, Obama has been focused on rebuilding the sometimes-threadbare ties between the U.S. and its Asian treaty partners, and he is perpetually on the hunt for opportunities to draw other Asian nations into the U.S. orbit. His dramatic opening to Burma was one such opportunity; Vietnam and the entire constellation of Southeast Asian countries fearful of Chinese domination presented others.

Obama believes, Carter said, that Asia “is the part of the world of greatest consequence to the American future, and that no president can take his eye off of this.” He added, “He consistently asks, even in the midst of everything else that’s going on, ‘Where are we in the Asia-Pacific rebalance? Where are we in terms of resources?’ He’s been extremely consistent about that, even in times of Middle East tension.”

“Right now, I don’t think that anybody can be feeling good about the situation in the Middle East,” he said. “You have countries that are failing to provide prosperity and opportunity for their people. You’ve got a violent, extremist ideology, or ideologies, that are turbocharged through social media. You’ve got countries that have very few civic traditions, so that as autocratic regimes start fraying, the only organizing principles are sectarian.”

He went on, “Contrast that with Southeast Asia, which still has huge problems—enormous poverty, corruption—but is filled with striving, ambitious, energetic people who are every single day scratching and clawing to build businesses and get education and find jobs and build infrastructure. The contrast is pretty stark.”

In Asia, as well as in Latin America and Africa, Obama says, he sees young people yearning for self-improvement, modernity, education, and material wealth.“They are not thinking about how to kill Americans,” he says. “What they’re thinking about is How do I get a better education? How do I create something of value?”

He then made an observation that I came to realize was representative of his bleakest, most visceral understanding of the Middle East today—not the sort of understanding that a White House still oriented around themes of hope and change might choose to advertise. “If we’re not talking to them,” he said, referring to young Asians and Africans and Latin Americans, “because the only thing we’re doing is figuring out how to destroy or cordon off or control the malicious, nihilistic, violent parts of humanity, then we’re missing the boat.

He does resist refracting radical Islam through the “clash of civilizations” prism popularized by the late political scientist Samuel Huntington. But this is because, he and his advisers argue, he does not want to enlarge the ranks of the enemy. “The goal is not to force a Huntington template onto this conflict,” said John Brennan, the CIA director.

“It is very clear what I mean,” he told me, “which is that there is a violent, radical, fanatical, nihilistic interpretation of Islam by a faction—a tiny faction—within the Muslim community that is our enemy, and that has to be defeated.”

“There is also the need for Islam as a whole to challenge that interpretation of Islam, to isolate it, and to undergo a vigorous discussion within their community about how Islam works as part of a peaceful, modern society,” he said. But he added, “I do not persuade peaceful, tolerant Muslims to engage in that debate if I’m not sensitive to their concern that they are being tagged with a broad brush.”

In private encounters with other world leaders, Obama has argued that there will be no comprehensive solution to Islamist terrorism until Islam reconciles itself to modernity and undergoes some of the reforms that have changed Christianity.

, Obama described how he has watched Indonesia gradually move from a relaxed, syncretistic Islam to a more fundamentalist, unforgiving interpretation; large numbers of Indonesian women, he observed, have now adopted the hijab, the Muslim head covering.

Why, Turnbull asked, was this happening?Because, Obama answered, the Saudis and other Gulf Arabs have funneled money, and large numbers of imams and teachers, into the country. In the 1990s, the Saudis heavily funded Wahhabist madrassas, seminaries that teach the fundamentalist version of Islam favored by the Saudi ruling family, Obama told Turnbull. Today, Islam in Indonesia is much more Arab in orientation than it was when he lived there, he said.

“Aren’t the Saudis your friends?,” Turnbull asked.Obama smiled. “It’s complicated,” he said.

But he went on to say that the Saudis need to “share” the Middle East with their Iranian foes. “The competition between the Saudis and the Iranians—which has helped to feed proxy wars and chaos in Syria and Iraq and Yemen—requires us to say to our friends as well as to the Iranians that they need to find an effective way to share the neighborhood and institute some sort of cold peace,”

“An approach that said to our friends ‘You are right, Iran is the source of all problems, and we will support you in dealing with Iran’ would essentially mean that as these sectarian conflicts continue to rage and our Gulf partners, our traditional friends, do not have the ability to put out the flames on their own or decisively win on their own, and would mean that we have to start coming in and using our military power to settle scores. And that would be in the interest neither of the United States nor of the Middle East.”

One of the most destructive forces in the Middle East, Obama believes, is tribalism—a force no president can neutralize. Tribalism, made manifest in the reversion to sect, creed, clan, and village by the desperate citizens of failing states, is the source of much of the Muslim Middle East’s problems, and it is another source of his fatalism. Obama has deep respect for the destructive resilience of tribalism—part of his memoir, Dreams From My Father, concerns the way in which tribalism in post-colonial Kenya helped ruin his father’s life—which goes some distance in explaining why he is so fastidious about avoiding entanglements in tribal conflicts.

“It is literally in my DNA to be suspicious of tribalism,” he told me. “I understand the tribal impulse, and acknowledge the power of tribal division. I’ve been navigating tribal divisions my whole life. In the end, it’s the source of a lot of destructive acts.”

“Look, I am not of the view that human beings are inherently evil,” he said. “I believe that there’s more good than bad in humanity. And if you look at the trajectory of history, I am optimistic.

“I believe that overall, humanity has become less violent, more tolerant, healthier, better fed, more empathetic, more able to manage difference. But it’s hugely uneven. And what has been clear throughout the 20th and 21st centuries is that the progress we make in social order and taming our baser impulses and steadying our fears can be reversed very quickly. Social order starts breaking down if people are under profound stress. Then the default position is tribe—us/them, a hostility toward the unfamiliar or the unknown.”

He continued, “Right now, across the globe, you’re seeing places that are undergoing severe stress because of globalization, because of the collision of cultures brought about by the Internet and social media, because of scarcities—some of which will be attributable to climate change over the next several decades—because of population growth. And in those places, the Middle East being Exhibit A, the default position for a lot of folks is to organize tightly in the tribe and to push back or strike out against those who are different.

“A group like isil is the distillation of every worst impulse along these lines. The notion that we are a small group that defines ourselves primarily by the degree to which we can kill others who are not like us, and attempting to impose a rigid orthodoxy that produces nothing, that celebrates nothing, that really is contrary to every bit of human progress—it indicates the degree to which that kind of mentality can still take root and gain adherents in the 21st century.”

“We have to determine the best tools to roll back those kinds of attitudes,” he said. “There are going to be times where either because it’s not a direct threat to us or because we just don’t have the tools in our toolkit to have a huge impact that, tragically, we have to refrain from jumping in with both feet.”

I asked Obama whether he would have sent the Marines to Rwanda in 1994 to stop the genocide as it was happening, had he been president at the time. “Given the speed with which the killing took place, and how long it takes to crank up the machinery of the U.S. government, I understand why we did not act fast enough,” he said. “Now, we should learn from tha

I actually think that Rwanda is an interesting test case because it’s possible—not guaranteed, but it’s possible—that this was a situation where the quick application of force might have been enough.

“Ironically, it’s probably easier to make an argument that a relatively small force inserted quickly with international support would have resulted in averting genocide [more successfully in Rwanda] than in Syria right now, where the degree to which the various groups are armed and hardened fighters and are supported by a whole host of external actors with a lot of resources requires a much larger commitment of forces.”

The Turkey press conference, I told him, “was a moment for you as a politician to say, ‘Yeah, I hate the bastards too, and by the way, I am taking out the bastards.’ ” The easy thing to do would have been to reassure Americans in visceral terms that he will kill the people who want to kill them. Does he fear a knee-jerk reaction in the direction of another Middle East invasion? Or is he just inalterably Spockian?

“Every president has strengths and weaknesses,” he answered. “And there is no doubt that there are times where I have not been attentive enough to feelings and emotions and politics in communicating what we’re doing and how we’re doing it.”

But for America to be successful in leading the world, he continued, “I believe that we have to avoid being simplistic. I think we have to build resilience and make sure that our political debates are grounded in reality. It’s not that I don’t appreciate the value of theater in political communications; it’s that the habits we—the media, politicians—have gotten into, and how we talk about these issues, are so detached so often from what we need to be doing that for me to satisfy the cable news hype-fest would lead to us making worse and worse decisions over time.”

“During the couple of months in which everybody was sure Ebola was going to destroy the Earth and there was 24/7 coverage of Ebola, if I had fed the panic or in any way strayed from ‘Here are the facts, here’s what needs to be done, here’s how we’re handling it, the likelihood of you getting Ebola is very slim, and here’s what we need to do both domestically and overseas to stamp out this epidemic,’ ” then “maybe people would have said ‘Obama is taking this as seriously as he needs to be.’ ” But feeding the panic by overreacting could have shut down travel to and from three African countries that were already cripplingly poor, in ways that might have destroyed their economies—which would likely have meant, among other things, a recurrence of Ebola. He added, “It would have also meant that we might have wasted a huge amount of resources in our public-health systems that need to be devoted to flu vaccinations and other things that actually kill people” in large numbers in America

“I have friends who have kids in Paris right now,” he said. “And you and I and a whole bunch of people who are writing about what happened in Paris have strolled along the same streets where people were gunned down. And it’s right to feel fearful. And it’s important for us not to ever get complacent. There’s a difference between resilience and complacency.” He went on to describe another difference—between making considered decisions and making rash, emotional ones. “What it means, actually, is that you care so much that you want to get it right and you’re not going to indulge in either impetuous or, in some cases, manufactured responses that make good sound bites but don’t produce results. The stakes are too high to play those games.”

The other meeting took place two months later, in the Oval Office, between Obama and the general secretary of the Vietnamese Communist Party, Nguyen Phu Trong. This meeting took place only because John Kerry had pushed the White House to violate protocol, since the general secretary was not a head of state. But the goals trumped decorum: Obama wanted to lobby the Vietnamese on the Trans-Pacific Partnership—his negotiators soon extracted a promise from the Vietnamese that they would legalize independent labor unions—and he wanted to deepen cooperation on strategic issues. Administration officials have repeatedly hinted to me that Vietnam may one day soon host a permanent U.S. military presence, to check the ambitions of the country it now fears most, China. The U.S. Navy’s return to Cam Ranh Bay would count as one of the more improbable developments in recent American history. “We just moved the Vietnamese Communist Party to recognize labor rights in a way that we could never do by bullying them or scaring them,” Obama told me, calling this a key victory in his campaign to replace stick-waving with diplomatic persuasion.

I noted that the 200 or so young Southeast Asians in the room earlier that day—including citizens of Communist-ruled countries—seemed to love America. “They do,” Obama said. “In Vietnam right now, America polls at 80 percent.”

The resurgent popularity of America throughout Southeast Asia means that “we can do really big, important stuff—which, by the way, then has ramifications across the board,” he said, “because when Malaysia joins the anti-isil campaign, that helps us leverage resources and credibility in our fight against terrorism. When we have strong relations with Indonesia, that helps us when we are going to Paris and trying to negotiate a climate treaty, where the temptation of a Russia or some of these other countries may be to skew the deal in a way that is unhelpful.

Obama then cited America’s increased influence in Latin America—increased, he said, in part by his removal of a region-wide stumbling block when he reestablished ties with Cuba—as proof that his deliberate, nonthreatening, diplomacy-centered approach to foreign relations is working. The alba movement, a group of Latin American governments oriented around anti-Americanism, has significantly weakened during his time as president. “When I came into office, at the first Summit of the Americas that I attended, Hugo Chávez”—the late anti-American Venezuelan dictator—“was still the dominant figure in the conversation,” he said. “We made a very strategic decision early on, which was, rather than blow him up as this 10-foot giant adversary, to right-size the problem and say, ‘We don’t like what’s going on in Venezuela, but it’s not a threat to the United States.’

Obama said that to achieve this rebalancing, the U.S. had to absorb the diatribes and insults of superannuated Castro manqués. “When I saw Chávez, I shook his hand and he handed me a Marxist critique of the U.S.–Latin America relationship,” Obama recalled. “And I had to sit there and listen to Ortega”—Daniel Ortega, the radical leftist president of Nicaragua—“make an hour-long rant against the United States. But us being there, not taking all that stuff seriously—because it really wasn’t a threat to us”—helped neutralize the region’s anti-Americanism.

“The truth is, actually, Putin, in all of our meetings, is scrupulously polite, very frank. Our meetings are very businesslike. He never keeps me waiting two hours like he does a bunch of these other folks.” Obama said that Putin believes his relationship with the U.S. is more important than Americans tend to think. “He’s constantly interested in being seen as our peer and as working with us, because he’s not completely stupid. He understands that Russia’s overall position in the world is significantly diminished. And the fact that he invades Crimea or is trying to prop up Assad doesn’t suddenly make him a player.

“The argument is made,” I said, “that Vladimir Putin watched you in Syria and thought, He’s too logical, he’s too rational, he’s too into retrenchment. I’m going to push him a little bit further in Ukraine.”

“Look, this theory is so easily disposed of that I’m always puzzled by how people make the argument. I don’t think anybody thought that George W. Bush was overly rational or cautious in his use of military force. And as I recall, because apparently nobody in this town does, Putin went into Georgia on Bush’s watch, right smack dab in the middle of us having over 100,000 troops deployed in Iraq.” Obama was referring to Putin’s 2008 invasion of Georgia, a former Soviet republic, which was undertaken for many of the same reasons Putin later invaded Ukraine—to keep an ex–Soviet republic in Russia’s sphere of influence.

“Putin acted in Ukraine in response to a client state that was about to slip out of his grasp. And he improvised in a way to hang on to his control there,” he said. “He’s done the exact same thing in Syria, at enormous cost to the well-being of his own country. And the notion that somehow Russia is in a stronger position now, in Syria or in Ukraine, than they were before they invaded Ukraine or before he had to deploy military forces to Syria is to fundamentally misunderstand the nature of power in foreign affairs or in the world generally. Real power means you can get what you want without having to exert violence. Russia was much more powerful when Ukraine looked like an independent country but was a kleptocracy that he could pull the strings on.”

Obama’s theory here is simple: Ukraine is a core Russian interest but not an American one, so Russia will always be able to maintain escalatory dominance there.“The fact is that Ukraine, which is a non-nato country, is going to be vulnerable to military domination by Russia no matter what we do,” he said.

“I think that the best argument you can make on the side of those who are critics of my foreign policy is that the president doesn’t exploit ambiguity enough. He doesn’t maybe react in ways that might cause people to think, Wow, this guy might be a little crazy.”“The ‘crazy Nixon’ approach,” I said: Confuse and frighten your enemies by making them think you’re capable of committing irrational acts.

“But let’s examine the Nixon theory,” he said. “So we dropped more ordnance on Cambodia and Laos than on Europe in World War II, and yet, ultimately, Nixon withdrew, Kissinger went to Paris, and all we left behind was chaos, slaughter, and authoritarian governments

“There is no evidence in modern American foreign policy that that’s how people respond. People respond based on what their imperatives are, and if it’s really important to somebody, and it’s not that important to us, they know that, and we know that,” he said. “There are ways to deter, but it requires you to be very clear ahead of time about what is worth going to war for and what is not.

Now, if there is somebody in this town that would claim that we would consider going to war with Russia over Crimea and eastern Ukraine, they should speak up and be very clear about it. The idea that talking tough or engaging in some military action that is tangential to that particular area is somehow going to influence the decision making of Russia or China is contrary to all the evidence we have seen over the last 50 years.”

“If you think about, let’s say, the Iran hostage crisis, there is a narrative that has been promoted today by some of the Republican candidates that the day Reagan was elected, because he looked tough, the Iranians decided, ‘We better turn over these hostages,’ ” he said. “In fact what had happened was that there was a long negotiation with the Iranians and because they so disliked Carter—even though the negotiations had been completed—they held those hostages until the day Reagan got elected

When you think of the military actions that Reagan took, you have Grenada—which is hard to argue helped our ability to shape world events, although it was good politics for him back home. You have the Iran-Contra affair, in which we supported right-wing paramilitaries and did nothing to enhance our image in Central America, and it wasn’t successful at all.” He reminded me that Reagan’s great foe, Daniel Ortega, is today the unrepentant president of Nicaragua.

Obama also cited Reagan’s decision to almost immediately pull U.S. forces from Lebanon after 241 servicemen were killed in a Hezbollah attack in 1983. “Apparently all these things really helped us gain credibility with the Russians and the Chinese,” because “that’s the narrative that is told,” he said sarcastically.

“Now, I actually think that Ronald Reagan had a great success in foreign policy, which was to recognize the opportunity that Gorbachev presented and to engage in extensive diplomacy—which was roundly criticized by some of the same people who now use Ronald Reagan to promote the notion that we should go around bombing people.”

“As I survey the next 20 years, climate change worries me profoundly because of the effects that it has on all the other problems that we face,” he said. “If you start seeing more severe drought; more significant famine; more displacement from the Indian subcontinent and coastal regions in Africa and Asia; the continuing problems of scarcity, refugees, poverty, disease—this makes every other problem we’ve got worse. That’s above and beyond just the existential issues of a planet that starts getting into a bad feedback loop.”

Terrorism, he said, is also a long-term problem “when combined with the problem of failed states.”

What country does he consider the greatest challenge to America in the coming decades? “In terms of traditional great-state relations, I do believe that the relationship between the United States and China is going to be the most critical,” he said. “If we get that right and China continues on a peaceful rise, then we have a partner that is growing in capability and sharing with us the burdens and responsibilities of maintaining an international order. If China fails; if it is not able to maintain a trajectory that satisfies its population and has to resort to nationalism as an organizing principle; if it feels so overwhelmed that it never takes on the responsibilities of a country its size in maintaining the international order; if it views the world only in terms of regional spheres of influence—then not only do we see the potential for conflict with China, but we will find ourselves having more difficulty dealing with these other challenges that are going to come.”

I’ve been very explicit in saying that we have more to fear from a weakened, threatened China than a successful, rising China,” Obama said. “I think we have to be firm where China’s actions are undermining international interests, and if you look at how we’ve operated in the South China Sea, we have been able to mobilize most of Asia to isolate China in ways that have surprised China, frankly, and have very much served our interest in strengthening our alliances.”

A weak, flailing Russia constitutes a threat as well, though not quite a top-tier threat. “Unlike China, they have demographic problems, economic structural problems, that would require not only vision but a generation to overcome,” Obama said. “The path that Putin is taking is not going to help them overcome those challenges. But in that environment, the temptation to project military force to show greatness is strong, and that’s what Putin’s inclination is. So I don’t underestimate the dangers there.”

“You know, the notion that diplomacy and technocrats and bureaucrats somehow are helping to keep America safe and secure, most people think, Eh, that’s nonsense. But it’s true. And by the way, it’s the element of American power that the rest of the world appreciates unambiguously

When we deploy troops, there’s always a sense on the part of other countries that, even where necessary, sovereignty is being violated.”

Administration officials have told me that Vice President Biden, too, has become frustrated with Kerry’s demands for action. He has said privately to the secretary of state, “John, remember Vietnam? Remember how that started?” At a National Security Council meeting held at the Pentagon in December, Obama announced that no one except the secretary of defense should bring him proposals for military action. Pentagon officials understood Obama’s announcement to be a brushback pitch directed at Kerry.

Obama’s caution on Syria has vexed those in the administration who have seen opportunities, at different moments over the past four years, to tilt the battlefield against Assad. Some thought that Putin’s decision to fight on behalf of Assad would prompt Obama to intensify American efforts to help anti-regime rebels. But Obama, at least as of this writing, would not be moved, in part because he believed that it was not his business to stop Russia from making what he thought was a terrible mistake. “They are overextended. They’re bleeding,” he told me. “And their economy has contracted for three years in a row, drastically.

Obama’s strategy was occasionally referred to as the “Tom Sawyer approach.” Obama’s view was that if Putin wanted to expend his regime’s resources by painting the fence in Syria, the U.S. should let him.

By late winter, though, when it appeared that Russia was making advances in its campaign to solidify Assad’s rule, the White House began discussing ways to deepen support for the rebels, though the president’s ambivalence about more-extensive engagement remained. In conversations I had with National Security Council officials over the past couple of months, I sensed a foreboding that an event—another San Bernardino–style attack, for instance—would compel the United States to take new and direct action in Syria. For Obama, this would be a nightmare.

If there had been no Iraq, no Afghanistan, and no Libya, Obama told me, he might be more apt to take risks in Syria. “A president does not make decisions in a vacuum. He does not have a blank slate. Any president who was thoughtful, I believe, would recognize that after over a decade of war, with obligations that are still to this day requiring great amounts of resources and attention in Afghanistan, with the experience of Iraq, with the strains that it’s placed on our military—any thoughtful president would hesitate about making a renewed commitment in the exact same region of the world with some of the exact same dynamics and the same probability of an unsatisfactory outcome.”

What has struck me is that, even as his secretary of state warns about a dire, Syria-fueled European apocalypse, Obama has not recategorized the country’s civil war as a top-tier security threat.

This critique frustrates the president. “Nobody remembers bin Laden anymore,” he says. “Nobody talks about me ordering 30,000 more troops into Afghanistan.” The red-line crisis, he said, “is the point of the inverted pyramid upon which all other theories rest.

“Was it a bluff?” I told him that few people now believe he actually would have attacked Iran to keep it from getting a nuclear weapon.“That’s interesting,” he said, noncommittally.I started to talk: “Do you—”He interrupted. “I actually would have,” he said, meaning that he would have struck Iran’s nuclear facilities. “If I saw them break out.”

“You were right to believe it,” the president said. And then he made his key point. “This was in the category of an American interest.”

I was reminded then of something Derek Chollet, a former National Security Council official, told me: “Obama is a gambler, not a bluffer.”

The president has placed some huge bets. Last May, as he was trying to move the Iran nuclear deal through Congress, I told him that the agreement was making me nervous. His response was telling. “Look, 20 years from now, I’m still going to be around, God willing. If Iran has a nuclear weapon, it’s my name on this,” he said. “I think it’s fair to say that in addition to our profound national-security interests, I have a personal interest in locking this down.”

In the matter of the Syrian regime and its Iranian and Russian sponsors, Obama has bet, and seems prepared to continue betting, that the price of direct U.S. action would be higher than the price of inaction. And he is sanguine enough to live with the perilous ambiguities of his decisions

Though in his Nobel Peace Prize speech in 2009, Obama said, “Inaction tears at our conscience and can lead to more costly intervention later,” today the opinions of humanitarian interventionists do not seem to move him, at least not publicly

As he comes to the end of his presidency, Obama believes he has done his country a large favor by keeping it out of the maelstrom—and he believes, I suspect, that historians will one day judge him wise for having done so

Inside the West Wing, officials say that Obama, as a president who inherited a financial crisis and two active wars from his predecessor, is keen to leave “a clean barn” to whoever succeeds him. This is why the fight against isis, a group he considers to be a direct, though not existential, threat to the U.S., is his most urgent priority for the remainder of his presidency; killing the so-called caliph of the Islamic State, Abu Bakr al-Baghdadi, is one of the top goals of the American national-security apparatus in Obama’s last year.

This is what is so controversial about the president’s approach, and what will be controversial for years to come—the standard he has used to define what, exactly, constitutes a direct threat.

Obama has come to a number of dovetailing conclusions about the world, and about America’s role in it. The first is that the Middle East is no longer terribly important to American interests. The second is that even if the Middle East were surpassingly important, there would still be little an American president could do to make it a better place. The third is that the innate American desire to fix the sorts of problems that manifest themselves most drastically in the Middle East inevitably leads to warfare, to the deaths of U.S. soldiers, and to the eventual hemorrhaging of U.S. credibility and power. The fourth is that the world cannot afford to see the diminishment of U.S. power. Just as the leaders of several American allies have found Obama’s leadership inadequate to the tasks before him, he himself has found world leadership wanting: global partners who often lack the vision and the will to spend political capital in pursuit of broad, progressive goals, and adversaries who are not, in his mind, as rational as he is. Obama believes that history has sides, and that America’s adversaries—and some of its putative allies—have situated themselves on the wrong one, a place where tribalism, fundamentalism, sectarianism, and militarism still flourish. What they don’t understand is that history is bending in his direction.

“The central argument is that by keeping America from immersing itself in the crises of the Middle East, the foreign-policy establishment believes that the president is precipitating our decline,” Ben Rhodes told me. “But the president himself takes the opposite view, which is that overextension in the Middle East will ultimately harm our economy, harm our ability to look for other opportunities and to deal with other challenges, and, most important, endanger the lives of American service members for reasons that are not in the direct American national-security interest.

George W. Bush was also a gambler, not a bluffer. He will be remembered harshly for the things he did in the Middle East. Barack Obama is gambling that he will be judged well for the things he didn’t do.

Unfortunately, that also means that the more the fact-based media tries to debunk the president’s falsehoods, the further it will entrench the battle lines.

The press secretary also declined to answer a straightforward question about the unemployment rate, suggesting that the number will henceforth be whatever the Trump administration wants it to be.

In a stunning demonstration of the power and resiliency of our new post-factual political culture, Mr. Trump and his allies in the right media have already turned the term “fake news” against its critics, essentially draining it of any meaning. During the campaign, actual “fake news” — deliberate hoaxes — polluted political discourse and clogged social media timelines.

For years, the widely read Drudge Report has linked to the bizarre conspiracy theorist Alex Jones, who believes that both the attacks of Sept. 11 and the Sandy Hook shootings were government-inspired “false flag” operations.

But now any news deemed to be biased, annoying or negative can be labeled “fake news.” Erroneous reports that the bust of the Rev. Dr. Martin Luther King Jr. had been removed from the Oval Office or misleading reports that sanctions against Russia had been lifted will be seized on by Mr. Trump’s White House to reinforce his indictment.

In that world, the leader becomes the only reliable source of truth; a familiar phenomenon in an authoritarian state, but a radical departure from the norms of a democratic society. The battle over truth is now central to our politics.

By now, it ought to be evident that enemies are important to this administration, whether they are foreigners, refugees, international bankers or the press.

But discrediting independent sources of information also has two major advantages for Mr. Trump: It helps insulate him from criticism and it allows him to create his own narratives, metrics and “alternative facts.”

The Russian dissident and chess grandmaster Garry Kasparov drew upon long familiarity with that process when he tweeted: “The point of modern propaganda isn’t only to misinform or push an agenda. It is to exhaust your critical thinking, to annihilate truth.”

Mr. Trump and his allies are empowering this alt-reality media, providing White House access to Breitbart and other post-factual outlets that are already morphing into fierce defenders of the administration.

Scottie Nell Hughes, was asked to defend the clearly false statement by Mr. Trump that millions of votes had been cast illegally. She answered by explaining that everybody now had their own way of interpreting whether a fact was true or not.

Or as George Orwell said: “The very concept of objective truth is fading out of the world. Lies will pass into history.”

In the meantime, we must recognize the magnitude of the challenge. If we want to restore respect for facts and break through the intellectual ghettos on both the right and left, the mainstream media will have to be aggressive without being hysterical and adversarial without being unduly oppositional.

There may be short-term advantages to running headlines about millions of illegal immigrants voting or secret United Nations plots to steal your guns, but the longer the right enables such fabrications, the weaker it will be in the long run. As uncomfortable as it may be, it will fall to the conservative media to police its worst actors.

What’s more, this particular front in the war is not under Mueller, who spun it off to the U.S. attorney’s office in the Southern District of New York. This is not, in other words, a problem Trump can fire his way out of. The SDNY has a lot more than 17 prosecutors; and whether they are angry or not, Democrats or not, they are not going away.

The situation gets worse for the president—because nobody, including him, has much idea when the next blow is coming or along which of these fronts

nobody knows how quickly, if at all, the Southern District might choose to move against other Trump-world figures who are mentioned in yesterday’s Cohen plea filings or what they might seek to do with Cohen’s allegations against Trump himself.

There’s one more reason why nobody will tell the mad king the hopeless truth that he’s surrounded, outmanned, outgunned, and that there’s no telling from where or when the next blow will come: The king is mad and doesn’t want to hear it. And his courtiers, seeking his favor, have either to convince themselves or play along with it. They do this both in talks with him privately and in their public utterances—to show loyalty, or because they are well paid to do so.

“Based on our research, I can’t see evidence that we can reach 1.9C,” he said. “But whether we are now on course for 1.9C or 2.7C, the main point is that we should focus on concrete action.”

China has released five documents detailing plans to achieve its dual goals of peaking carbon emissions in 2030 and reaching net zero by 2060. “If you read those reports you can find all of our actions, but nobody reads everything,”

As an example, he said the working guidance document on carbon peaking and neutrality outlined a strict control on the increase of coal consumption during the 14th five-year period and then a gradual reduction during the following five years. “That means China will peak coal consumption around 2025, though that is not a line you will see in the document. You need to interpret it and nobody [outside China] can do that.”

Similarly, he said the government 1+N policy system provided a roadmap of 37 tasks that the country needed to take until 2060 on areas ranging from legislation and policy to technology and finance

There will be another 30 documents published in the coming year that break down actions needed in key sectors, such as building and transport, as well as major industries including steel and chemicals. “No country has issued so many documents to support its targets,” he said. “It’s a holistic solution, but nobody knows.”

China’s two different targets pose very different challenges, he said. “The peaking issue is easy. More difficult is how to achieve neutrality … We are in transition. Our concern in the future is not that China is too slow, but that it is too fast.”

“Our coal-fired plants have a life of 10 to 12 years. If we shut them down, who will pay for the stranded assets? Who will employ the laid-off workers?”

By the end of this decade, the government plans to reach 1200GW of wind and solar power, which would exceed the entire installed electricity capacity of the US, he said.

As at previous Cops, China will also push wealthy nations to make greater financial contributions to developing countries, which have done least to cause the climate crisis but suffer most from its consequences.

“China would like more effort on supporting developing countries,” he said. “If we are going to aim for 1.5C instead of 2C, then there has to be an increase in the funds available to make that happen.”

“1.5C is possible, but it would carry a cost, social and economic. If we cannot solve these problems equally, especially for developing countries, then it is not a real target.”

“We are all in the same boat, but different cabins,” he said. “Some live in a big space and eat too much. We need balance.”

America actually earns more from its assets abroad than it pays to foreign investors. If your image is of a nation that’s already deep in hock to the Chinese, you’ve been misinformed. Nor are we heading rapidly in that direction.

And that’s why nations with stable, responsible governments — that is, governments that are willing to impose modestly higher taxes when the situation warrants it — have historically been able to live with much higher levels of debt than today’s conventional wisdom would lead you to believe.

Creating a sustainable future is one of those problems. If you are starving, you don’t care about other social issues, like the environment, so for Ekezie and his co-founders, economic empowerment is key to long-term survival. He is keenly aware of the fact that by 2050 one third of the world’s population will reside in Africa, yet 43 percent of young Africans today are unemployed.

the benefits are really vivid, they are really clear. Everybody agrees that the world will be better off the faster we move. And that really wasn’t the case five or 10 years ago. There was much more muddled analysis and messaging then. And I think we have to take advantage of the new unanimity and not let people fall back on the logic of status quo bias and incumbency and just think that change is expensive and difficult

david wallace-wellsMy basic feeling is that the changes that we need are all systemic. And so the things that individuals can do to make that change are primarily through the political realm, not through their individual behavior. If we want to really halt this problem and get a handle on it, it means large, large scale changes that are beyond the capacity of individuals to enact on their own.

jane coastonHow do we get our house in order? What do I as an individual or the people listening to this podcast, how do I make this happen on my level? Knowing all of that, what do I do? What do I personally need to do? Give me a thing to do, Genevieve!

If you want to learn more about personal responsibility, I recommend Jason Marks’s article in the Sierra Club magazine, “Yes, actually, individual responsibility is essential to solving the climate crisis,” and the New York Times guest essay by Auden Schendler, “Worrying About Your Carbon Footprint is Exactly What Big Oil Wants You to Do.”

david wallace-wells

I don’t know that we have to all take on a feeling of guilt for the rise of G.D.P. under neoliberalism, because I don’t know that most of us have actually even seen that money.

ultimately, the things that we need to do to really get a hold of this are way bigger than cutting your food emissions by 10 percent or 50 percent or whatever. It’s like, the three of us in this room, we can’t build an electric grid, a solar farm. We can’t make sure that there are Tesla charging stations all across the country. We can’t re-imagine land use policy or agricultural policy. We can’t put an honest price on carbon so that when you’re buying gas, you’re actually paying for the environmental damage that’s being caused or when you’re buying an airplane ticket. Those are just things that are well outside of our capacity to control

jane coastonCould you explain what climate justice means to an audience that is me?genevieve guentherBasically, it means that the global north historically has been responsible for the vast majority of carbon pollution. And the global south has been responsible for almost none of it. Since 1990, for example, the top 10 percent of earners have been responsible for 52 percent of the growth of global emissions. And the poorest, 50 percent, who largely live in the global south, have been responsible for about 7 percent of global emissions. But that hasn’t grown at all. Historically, they have contributed nothing to the exponential growth of emissions and the increased and accelerating global heating that we’re already seeing. So the idea of climate justice is that global north nations have a moral responsibility to reduce their emissions first and faster so that there is some room left in whatever carbon budget we still have for the global south to pull themselves out of poverty.

jane coastonDavid, what do you make of what Genevieve said about the messaging about good and evil there?

david wallace-wellsI would say even more importantly, we can’t set our standard at extinction. It’s not like if we survive and avoid extinction, that that’s a success. There is huge suffering between here and there. And every degree of temperature rise is going to create more suffering. And every degree we avoid can help us avoid that.

The climate crisis has begun in the United States, too. But the real violence of it is in the global south. And I would argue that the global north doesn’t see it because the news media isn’t reporting on it and because the kind of white supremacy prevents people in this country from really recognizing that this is a violence that would feel unimaginable if it happened to their children.

genevieve guentherOK, so the first part is understanding why we have to do this. And I would argue that most Americans still don’t know enough about global heating and the climate crisis.

jane coastonYeah, but and a benefit when? Because I think a lot of this messaging relies on something that, in general, people do not like, which is, you may need to do a thing or change a thing about your life for a future that we have not yet defined. From a messaging perspective, how do we message the urgency

To think about the concrete impacts, 350,000 Americans, it’s estimated, die every single year from the air pollution from the burning of fossil fuels. That is a death toll literally equal to the 2020 death toll from COVID.

Or is it going to take so long that, in fact, things are going to spiral out of control?

within the space of a few years, by simply refusing to accept their own impotence, they have literally remade the entire landscape of global climate politics. Like in the U.S., when we have Joe Biden who Sunrise gave an F to in the primary, talking about this as an existential threat, that is because the protests worked. And they worked in an incredibly short amount of time

I personally think the high consumption, and particularly the flying of people who are in the public eye, trying to communicate the urgency of the climate crisis, is incredibly destructive to building a political movement. They’re actually doing something extremely counterproductive in my interpretation. They’re reinforcing everybody’s cognitive dissonance with their behavior, which is also a form of speech. They’re communicating that they’re not willing to make transformative changes and not willing to support transformative policies, and that, in fact, you need to use fossil fuels even to do climate work. And so, for me, I feel like the people who need to worry about their carbon footprints insofar as anybody does are the 1 percent and people in the climate movement.