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The modern bourgeois society that has sprouted from the ruins of feudal society has not done away with class antagonisms. It has but established new classes, new conditions of oppression, new forms of struggle in place of the old ones.

village communities were found to be, or to have been, the primitive form of society everywhere from India to Ireland.

the epoch of the bourgeoisie, possesses, however, this distinct feature: it has simplified class antagonisms.

The discovery of America, the rounding of the Cape, opened up fresh ground for the rising bourgeoisie.

The guild-masters were pushed on one side by the manufacturing middle class; division of labour between the different corporate guilds vanished in the face of division of labour in each single workshop.

It compels all nations, on pain of extinction, to adopt the bourgeois mode of production; it compels them to introduce what it calls civilisation into their midst, i.e., to become bourgeois themselves.

the bourgeoisie has at last, since the establishment of Modern Industry and of the world market, conquered for itself, in the modern representative State, exclusive political sway. The executive of the modern state is but a committee for managing the common affairs of the whole bourgeoisie.

The bourgeoisie has stripped of its halo every occupation hitherto honoured and looked up to with reverent awe. It has converted the physician, the lawyer, the priest, the poet, the man of science, into its paid wage labourers.

The bourgeoisie cannot exist without constantly revolutionising the instruments of production,

Constant revolutionising of production, uninterrupted disturbance of all social conditions, everlasting uncertainty and agitation distinguish the bourgeois epoch from all earlier ones.

The bourgeoisie has through its exploitation of the world market given a cosmopolitan character to production and consumption in every country.

The intellectual creations of individual nations become common property.

Each step in the development of the bourgeoisie was accompanied by a corresponding political advance of that class. An oppressed class under the sway of the feudal nobility, an armed and self-governing association in the medieval commune*

In one word, it creates a world after its own image.

The bourgeoisie has subjected the country to the rule of the towns. It has created enormous cities, has greatly increased the urban population as compared with the rural, and has thus rescued a considerable part of the population from the idiocy of rural life.

Independent, or but loosely connected provinces, with separate interests, laws, governments, and systems of taxation, became lumped together into one nation, with one government, one code of laws, one national class-interest, one frontier, and one customs-tariff.

Modern bourgeois society, with its relations of production, of exchange and of property, a society that has conjured up such gigantic means of production and of exchange, is like the sorcerer who is no longer able to control the powers of the nether world whom he has called up by his spells.

Society suddenly finds itself put back into a state of momentary barbarism; it appears as if a famine, a universal war of devastation, had cut off the supply of every means of subsistence; industry and commerce seem to be destroyed; and why? Because there is too much civilisation, too much means of subsistence, too much industry, too much commerce.

And how does the bourgeoisie get over these crises? On the one hand by enforced destruction of a mass of productive forces; on the other, by the conquest of new markets, and by the more thorough exploitation of the old ones. That is to say, by paving the way for more extensive and more destructive crises, and by diminishing the means whereby crises are prevented.

Owing to the extensive use of machinery, and to the division of labour, the work of the proletarians has lost all individual character, and, consequently, all charm for the workman.

But the price of a commodity, and therefore also of labour, is equal to its cost of production. In proportion, therefore, as the repulsiveness of the work increases, the wage decreases.

Modern Industry has converted the little workshop of the patriarchal master into the great factory of the industrial capitalist. Masses of labourers, crowded into the factory, are organised like soldiers.

Differences of age and sex have no longer any distinctive social validity for the working class. All are instruments of labour, more or less expensive to use, according to their age and sex.

At this stage, therefore, the proletarians do not fight their enemies, but the enemies of their enemies, the remnants of absolute monarchy, the landowners, the non-industrial bourgeois, the petty bourgeois.

the collisions between individual workmen and individual bourgeois take more and more the character of collisions between two classes.

But every class struggle is a political struggle.

a section of the nobility went over to the bourgeoisie, so now a portion of the bourgeoisie goes over to the proletariat, and in particular, a portion of the bourgeois ideologists, who have raised themselves to the level of comprehending theoretically the historical movement as a whole.

The lower middle class, the small manufacturer, the shopkeeper, the artisan, the peasant, all these fight against the bourgeoisie, to save from extinction their existence as fractions of the middle class. They are therefore not revolutionary, but conservative. Nay more, they are reactionary, for

The serf, in the period of serfdom, raised himself to membership in the commune, just as the petty bourgeois, under the yoke of the feudal absolutism, managed to develop into a bourgeois.

He becomes a pauper, and pauperism develops more rapidly than population and wealth.

It is unfit to rule because it is incompetent to assure an existence to its slave within his slavery, because it cannot help letting him sink into such a state, that it has to feed him, instead of being fed by him. Society can no longer live under this bourgeoisie, in other words, its existence is no longer compatible with society.

Its fall and the victory of the proletariat are equally inevitable.

I had other doubts, too. It seemed hubristic, or worse, to make multitrillion-dollar policy bets based on computer models trying to forecast climate patterns decades into the future. Climate activists kept promoting policies based on technologies that were either far from mature (solar energy) or sometimes actively harmful (biofuels).

Expensive efforts to curb greenhouse gas emissions in Europe and North America seemed particularly fruitless when China, India and other developing countries weren’t about to curb their own appetite for fossil fuels

just how fast is Greenland’s ice melting right now? Is this an emergency for our time, or is it a problem for the future?

His pitch was simple: The coastline we have taken for granted for thousands of years of human history changed rapidly in the past on account of natural forces — and would soon be changing rapidly and disastrously by man-made ones. A trip to Greenland, which holds one-eighth of the world’s ice on land (most of the rest is in Antarctica) would show me just how drastic those changes have been. Would I join him?

Greenland is about the size of Alaska and California combined and, except at its coasts, is covered by ice that in places is nearly two miles thick. Even that’s only a fraction of the ice in Antarctica, which is more than six times as large

Greenland’s ice also poses a nearer-term risk because it is melting faster. If all its ice were to melt, global sea levels would rise by some 24 feet. That would be more than enough to inundate hundreds of coastal cities in scores of nations, from Jakarta and Bangkok to Copenhagen and Amsterdam to Miami and New Orleans.

There was also a millenarian fervor that bothered me about climate activism, with its apocalyptic imagery (the Statue of Liberty underwater) and threats of doom unless we were willing to live far more frugally.

“We haven’t had a good positive mass balance year since the late 1990s,” he told me in a follow-on email when I asked him to explain the data for me. The losses can vary sharply by year. The annualized average over the past 30 years, he added, is 170 gigatons per year. That’s the equivalent of about 5,400 tons of ice loss per second. That “suggests that Greenland ice loss has been tracking the I.P.P.C. worse-case, highest-carbon-emission scenario.

The data shows unmistakably that Greenland’s ice is not in balance. It is losing far more than it is gaining.

scientists have been drilling ice-core samples from Greenland for decades, giving them a very good idea of climatic changes stretching back thousands of years. Better yet, a pair of satellites that detect anomalies in Earth’s gravity fields have been taking measurements of the sheet regularly for nearly 20 years, giving scientists a much more precise idea of what is happening.

it’s hard to forecast with any precision what that means. “Anyone who says they know what the sea level is going to be in 2100 is giving you an educated guess,” said NASA’s Willis. “The fact is, we’re seeing these big ice sheets melt for the first time in history, and we don’t really know how fast they can go.”

His own educated guess: “By 2100, we are probably looking at more than a foot or two and hopefully less than seven or eight feet. But we are struggling to figure out just how fast the ice sheets can melt. So the upper end of range is still not well known.”

On the face of it, that sounds manageable. Even if sea levels rise by eight feet, won’t the world have nearly 80 years to come to grips with the problem, during which technologies that help us mitigate the effects of climate change while adapting to its consequences are likely to make dramatic advances?

Won’t the world — including countries that today are poor — become far richer and thus more capable of weathering the floods, surges and superstorms?

The average rate at which sea level is rising around the world, he estimates, has more than tripled over the past three decades, to five millimeters a year from 1.5 millimeters. That may still seem minute, yet as the world learned during the pandemic, exponential increases have a way of hitting hard.

“When something is on a straight line or a smooth curve, you can plot its trajectory,” Englander said. “But sea level, like earthquakes and mudslides, is something that happens irregularly and can change rather quickly and surprise us. The point is, you can no longer predict the future by the recent past.”

In The Wall Street Journal’s editorial pages, where I used to work, the theoretical physicist Steven Koonin, a former under secretary for science in the Obama administration’s Energy Department, cast doubt on the threat from Thwaites in a voice that could have once been mine. He also thinks the risks associated with Greenland’s melting are less a product of human-induced global warming than of natural cycles in North Atlantic currents and temperatures, which over time have a way of regressing to the mean.

Even the poorest countries, while still unacceptably vulnerable, are suffering far fewer human and economic losses to climate-related disasters.

Another climate nonalarmist is Roger Pielke Jr., a professor of environmental studies at the University of Colorado Boulder. I call Pielke a nonalarmist rather than a skeptic because he readily acknowledges that the challenges associated with climate change, including sea-level rise, are real, serious and probably unstoppable, at least for many decades.

“If we have to have a problem,” he told me when I reached him by phone, “we probably want one with a slow onset that we can see coming. It’s not like an asteroid coming from space.”

“Since the 1940s, the impact of floods as a proportion of U.S. gross domestic product has dropped by 70 percent-plus,” Pielke said. “We see this around the world, across phenomena. The story is that fewer people are dying and we are having less damage proportional to G.D.P.”

“Much climate reporting today highlights short-term changes when they fit the narrative of a broken climate but then ignores or plays down changes when they don’t, often dismissing them as ‘just weather,’” he wrote in February.

Global warming is real and getting worse, Pielke said, yet still it’s possible that humanity will be able to adapt to, and compensate for, its effects.

A few years ago, I would have found voices like Koonin’s and Pielke’s persuasive. Now I’m less sure. What intervened was a pandemic.

That’s what I thought until the spring of 2020, when, along with everyone else, I experienced how swiftly and implacably nature can overwhelm even the richest and most technologically advanced societies. It was a lesson in the sort of intellectual humility I recommended for others

It was also a lesson in thinking about risk, especially those in the category known as high-impact, low-probability events that seem to be hitting us with such regularity in this century: the attacks of Sept. 11, 2001; the tsunamis of 2004 and 2011, the mass upheavals in the Arab world

What if the past does nothing to predict the future? What if climate risks do not evolve gradually and relatively predictably but instead suddenly soar uncontrollably? How much lead time is required to deal with something like sea-level rise? How do we weigh the risks of underreacting to climate change against the risks of overreacting to it?

I called Seth Klarman, one of the world’s most successful hedge-fund managers, to think through questions of risk. While he’s not an expert on climate change, he has spent decades thinking deeply about every manner of risk

And we will almost certainly have to do it from sources other than Russia, China, the Democratic Republic of Congo and other places that pose unacceptable strategic, environmental or humanitarian risks

“If you face something that is potentially existential,” he explained, “existential for nations, even for life as we know it, even if you thought the risk is, say, 5 percent, you’d want to hedge against it.”

“One thing we try to do,” he said, “is we buy protection when it’s really inexpensive, even when we think we may well not need it.” The forces contributing to climate change, he noted, echoing Englander, “might be irreversible sooner than the damage from climate change has become fully apparent. You can’t say it’s far off and wait when, if you had acted sooner, you might have dealt with it better and at less cost. We have to act now.”

In other words, an ounce of prevention is worth a pound of cure. That’s particularly true if climate change is akin to cancer — manageable or curable in its earlier stages, disastrous in its later ones.

As I’ve always believed, knowing there is grave risk to future generations — and expecting current ones to make immediate sacrifices for it — defies most of what we know about human nature. So I began to think more deeply about that challenge, and others.

For the world to achieve the net-zero goal for carbon dioxide emissions by 2050, according to the International Energy Agency, we will have to mine, by 2040, six times the current amounts of critical minerals — nickel, cobalt, copper, lithium, manganese, graphite, chromium, rare earths and other minerals and elements — needed for electric vehicles, wind turbines and solar panels.

The poster child for this kind of magical thinking is Germany, which undertook a historic Energiewende — “energy revolution” — only to come up short. At the turn of the century, Germany got about 85 percent of its primary energy from fossil fuels. Now it gets about 78 percent, a puny reduction, considering that the country has spent massive sums on renewables to increase the share of electricity it generates from them.

As in everything else in life, so too with the environment: There is no such thing as a free lunch. Whether it’s nuclear, biofuels, natural gas, hydroelectric or, yes, wind and solar, there will always be serious environmental downsides to any form of energy when used on a massive scale. A single industrial-size wind turbine, for instance, typically requires about a ton of rare earth metals as well as three metric tons of copper, which is notoriously destructive and dirty to mine.

no “clean energy” solution will easily liberate us from our overwhelming and, for now, inescapable dependence on fossil fuels.

Nobody brings the point home better than Vaclav Smil, the Canadian polymath whose most recent book, “How the World Really Works,” should be required reading for policymakers and anyone else interested in a serious discussion about potential climate solutions.

“I’ve talked to so many experts and seen so much evidence,” he told me over Zoom, “I’m convinced the climate is changing, and addressing climate change has become a philanthropic priority of mine.”

Things could turn a corner once scientists finally figure out a technical solution to the energy storage problem. Or when governments and local actors get over their NIMBYism when it comes to permitting and building a large energy grid to move electricity from Germany’s windy north to its energy-hungry south. Or when thoughtful environmental activists finally come to grips with the necessity of nuclear energy

Till then, even as I’ve come to accept the danger we face, I think it’s worth extending the cancer metaphor a little further: Just as cancer treatments, when they work at all, can have terrible side effects, much the same can be said of climate treatments: The gap between an accurate diagnosis and effective treatment remains dismayingly wide

Only when countries like Vietnam and China turned to a different model, of largely bottom-up, market-driven development, did hundreds of millions of people get lifted out of destitution.

the most important transformation has come in agriculture, which uses about 70 percent of the world’s freshwater supply.

Farmers gradually adopted sprinkler and drip irrigation systems, rather than more wasteful flood irrigation, not to conserve water but because the technology provided higher crop yields and larger profit margins.

Water shortages “will spur a revolutionary, aggressive approach to getting rid of flood irrigation,” said Seth Siegel, the chief sustainability officer of the Israeli AgTech company N-Drip. “Most of this innovation will be driven by free-market capitalism, with important incentives from government and NGOs.

meaningful environmental progress has been made through market forces. In this century, America’s carbon dioxide emissions across fuel types have fallen to well below 5,000 million metric tons per year, from a peak of about 6,000 million in 2007, even as our inflation-adjusted G.D.P. has grown by over 50 percent and total population by about 17 percent.

1) Engagement with critics is vital. Insults and stridency are never good tools of persuasion, and trying to cow or censor climate skeptics into silence rarely works

the biggest single driver in emissions reductions from 2005 to 2017 was the switch from coal to natural gas for power generation, since gas produces roughly half the carbon dioxide as coal. This, in turn, was the result of a fracking revolution in the past decade, fiercely resisted by many environmental activists, that made the United States the world’s largest gas producer.

In the long run, we are likelier to make progress when we adopt partial solutions that work with the grain of human nature, not big ones that work against it

Renewables, particularly wind power, played a role. So did efficiency mandates.

The problem with our civilization isn’t overconfidence. It’s polarization, paralysis and a profound lack of trust in all institutions, including the scientific one

Devising effective climate policies begins with recognizing the reality of the social and political landscape in which all policy operates. Some thoughts on how we might do better:

They may not be directly related to climate change but can nonetheless have a positive impact on it. And they probably won’t come in the form of One Big Idea but in thousands of little ones whose cumulative impacts add up.

2) Separate facts from predictions and predictions from policy. Global warming is a fact. So is the human contribution to it. So are observed increases in temperature and sea levels. So are continued increases if we continue to do more of the same. But the rate of those increases is difficult to predict even with the most sophisticated computer modeling

3) Don’t allow climate to become a mainly left-of-center concern. One reason the topic of climate has become so anathema to many conservatives is that so many of the proposed solutions have the flavor, and often the price tag, of old-fashioned statism

4) Be honest about the nature of the challenge. Talk of an imminent climate catastrophe is probably misleading, at least in the way most people understand “imminent.”

A more accurate description of the challenge might be a “potentially imminent tipping point,” meaning the worst consequences of climate change can still be far off but our ability to reverse them is drawing near. Again, the metaphor of cancer — never safe to ignore and always better to deal with at Stage 2 than at Stage 4 — can be helpful.

5) Be humble about the nature of the solutions. The larger the political and financial investment in a “big fix” response to climate change on the scale of the Energiewende, the greater the loss in time, capital and (crucially) public trust when it doesn’t work as planned

6) Begin solving problems our great-grandchildren will face. Start with sea-level rise

We can also stop providing incentives for building in flood-prone areas by raising the price of federal flood insurance to reflect the increased risk more accurately.

7) Stop viewing economic growth as a problem. Industrialization may be the leading cause of climate change. But we cannot and will not reverse it through some form of deindustrialization, which would send the world into poverty and deprivation

8) Get serious about the environmental trade-offs that come with clean energy. You cannot support wind farms but hinder the transmission lines needed to bring their power to the markets where they are needed.

9) A problem for the future is, by its very nature, a moral one. A conservative movement that claims to care about what we owe the future has the twin responsibility of setting an example for its children and at the same time preparing for that future.

The coronavirus pandemic could also put more people at risk.“If this winter is anything like this summer was,” Dr. Sharma said, “a lot of people spent time in cottage country in Ontario because we just can’t go anywhere.”

The researchers found that more cold-weather drownings occur in spring, when daily low temperatures increase too much to support stable ice structures.

“Milder temperatures mean that the ice is not as thick, or not as solid as it would otherwise be,” said Robert McLeman, a professor of geography and environmental studies at Wilfrid Laurier University who was not involved in the study.

She said that ice with sitting water, slush or holes in the surface was generally unsafe. “Snow cover is when it gets tricky,” Dr. Sharma said. “People think there’s so much snow on the ice, the ice must be thick,” but snow can also act as insulation, melting the ice more quickly.

“It may not be as safe now as it was 30 years or 40 years ago.”

Even at the current concentration, the evidence suggests that increases in sea level of 25 feet or more may have already become inevitable, albeit over a long period.

They coexisted in Europe for thousands of years, apparently trading tools and sharing cultures. Some groups survived the Ice Age, while others vanished,

when farmers arrived in Europe about 8,000 years ago, they encountered the descendants of this long history, with light-skinned, dark-eyed people to the east, and possibly dark-skinned and blue-eyed people to the west.

“We lack still an understanding of why these movements were triggered. What happened here, why it happened — it’s strange.”

Modern humans arose in Africa and expanded to other continents about 60,000 years ago

These early Europeans have almost no genetic link to younger remains of hunter-gatherers. It appears that the first modern humans in Europe may have disappeared along with the Neanderthals

he oldest DNA of modern humans in Europe, dating back 45,000 years, undermines such a simple story. It comes from people who belonged to a lost branch of the human family tree. Their ancestors were part of the expansion out of Africa, but they split off on their own before the ancestors of living Europeans and Asians split apart.

About 33,000 years ago, as the climate turned cold, a new culture called the Gravettian arose across Europe. Gravettian hunters made spears to kill woolly mammoths and other big game. They also made so-called Venus figurines that might have represented fertility.

When the glaciers retreated, some descendants of the Fournol continued living in Iberia. But others expanded north as a new population, which Dr. Posth and his colleagues called GoyetQ2. “It really seems like a peopling of Europe after the last glacial maximum,

Dr. Posth and his colleagues found DNA in Gravettian remains scattered across Europe. The scientists had expected all of the individuals to have come from the same genetic population, but instead found two distinct groups: one in France and Spain, and another in Italy, the Czech Republic and Germany.

“They were very distinct, and this was a very big surprise to us because they practiced the same archaeological culture,”

Dr. Posth and his colleagues named the western population the Fournol people, and found a genetic link between this group and 35,000-year-old Aurignacian remains in Belgium.

They called the eastern group Vestonice, and discovered that they share an ancestry with 34,000-year-old hunter-gatherers who lived in Russia.

That genetic gulf led Dr. Posth and his colleagues to argue that the Fournol and Vestonice belonged to two waves that migrated into Europe separately. After they arrived, they lived for several thousand years sharing the Gravettian culture but remaining genetically distinct.

It’s clear from the new study that they were not isolated entirely from each other. In Belgium, the scientists found 30,000-year-old remains with a mix of Fournol and Vestonice ancestry.

About 26,000 years ago, the two groups faced a new threat to their survival: an advancing wall of glaciers. During the Ice Age, from 26,000 to 19,000 years ago, European hunter-gatherers were shut out of much of the continent, surviving only in southern refuges.

the refuge of the Iberian Peninsula, the region now occupied by Spain and Portugal, by studying DNA in the teeth of a 23,000-year-old man found in a cave in southern Spain. His DNA revealed that he belonged to the Fournol people who lived in Iberia before the Ice Age. The researchers also found genetic markers linking him to a 45,000-year-old skeleton discovered in Bulgaria.

When these groups arrived in Europe, Neanderthals had already been living across the continent for more than 100,000 years. The Neanderthals disappeared about 40,000 years ago, perhaps because modern humans outcompeted them with superior tools.

The Vestonice, by contrast, did not survive the Ice Age. When the glaciers were at their most expansive, the Vestonice may have endured for a time in Italy. But Dr. Posth and his colleagues found no Vestonice ancestry in Europeans after the Ice Age. Instead, they discovered a population of hunter-gatherers that appeared to have expanded from the Balkans, known as the Villabruna. They moved into Italy and replaced the Vestonice.

For several thousand years, the Villabruna were limited to southern Europe. Then, 14,000 years ago, they crossed the Alps and encountered the GoyetQ2 people to the north. A new population emerged, its ancestry three parts Villabruna to one part GoyetQ2.

This new people, which Dr. Posth and his colleagues called Oberkassel, expanded across much of Europe, replacing the old GoyetQ2 population.

another climate shift could explain this new wave. About 14,000 years ago, a pulse of strong warming produced forests across much of Europe. The Oberkassel people may have been better at hunting in forests, whereas the GoyetQ2 retreated with the shrinking steppes.

To the east, the Oberkassel ran into a new group of hunter-gatherers, who probably arrived from Russia. The scientists named this group’s descendants, who lived in Ukraine and surrounding regions, the Sidelkino.

in Iberia, there were no great sweeps of newcomers replacing older peoples. The Iberians after the Ice Age still carried a great deal of ancestry from the Fournol people who had arrived there thousands of years before the glaciers advanced. The Villabruna people moved into northern Spain, but added their DNA to the mix rather than replacing those who were there before.

When the first farmers arrived in Europe from Turkey about 8,000 years ago, three large groups of hunter-gatherers thrived across Europe: the Iberians, the Oberkassel and the Sidelkino. Living Europeans carry some of their gene

The Sidelkino people in the east had genes associated with dark eyes and light skin. The Oberkassel in the west, in contrast, probably had blue eyes and may have had dark skin

These three groups of hunter-gatherers remained isolated from each other for about 6,000 years, until the farmers from Turkey arrived. After this advent of agriculture, the three groups began mixing, the scientists found. It’s possible that the spread of farmland forced them to move to the margins of Europe to survive. But over time, they were absorbed into the agricultural communities that surrounded them.

every continent will likely have its own history of hunter-gatherer migrations.

it is now possible to extract human DNA from cave sediments rather than searching for bones and teeth.

In 1981, Huntington predicted that the next moral convulsion would hit America around the second or third decade of the 21st century—that is, right about now.

Trump is the final instrument of this crisis, but the conditions that brought him to power and make him so dangerous at this moment were decades in the making, and those conditions will not disappear if he is defeated.

Social trust is a measure of the moral quality of a society—of whether the people and institutions in it are trustworthy, whether they keep their promises and work for the common g

When people in a society lose faith or trust in their institutions and in each other, the nation collapses.

This is an account of how, over the past few decades, America became a more untrustworthy society

under the stresses of 2020, American institutions and the American social order crumbled and were revealed as more untrustworthy still

We had a chance, in crisis, to pull together as a nation and build trust. We did not. That has left us a broken, alienated society caught in a distrust doom loop.

The Baby Boomers grew up in the 1950s and ’60s, an era of family stability, widespread prosperity, and cultural cohesion. The mindset they embraced in the late ’60s and have embodied ever since was all about rebelling against authority, unshackling from institutions, and celebrating freedom, individualism, and liberation.

The emerging generations today enjoy none of that sense of security. They grew up in a world in which institutions failed, financial systems collapsed, and families were fragile. Children can now expect to have a lower quality of life than their parents, the pandemic rages, climate change looms, and social media is vicious. Their worldview is predicated on threat, not safety.

Thus the values of the Millennial and Gen Z generations that will dominate in the years ahead are the opposite of Boomer values: not liberation, but security; not freedom, but equality; not individualism, but the safety of the collective; not sink-or-swim meritocracy, but promotion on the basis of social justice

A new culture is dawning. The Age of Precarity is here.

I’ve spent my career rebutting the idea that America is in decline, but the events of these past six years, and especially of 2020, have made clear that we live in a broken nation. The cancer of distrust has spread to every vital organ.

Those were the days of triumphant globalization. Communism was falling. Apartheid was ending. The Arab-Israeli dispute was calming down. Europe was unifying. China was prospering. In the United States, a moderate Republican president, George H. W. Bush, gave way to the first Baby Boomer president, a moderate Democrat, Bill Clinton.

The stench of national decline is in the air. A political, social, and moral order is dissolving. America will only remain whole if we can build a new order in its place.

The American economy grew nicely. The racial wealth gap narrowed. All the great systems of society seemed to be working: capitalism, democracy, pluralism, diversity, globalization. It seemed, as Francis Fukuyama wrote in his famous “The End of History?” essay for The National Interest, “an unabashed victory for economic and political liberalism.”

Nations with low social trust—like Brazil, Morocco, and Zimbabwe—have struggling economies.

We think of the 1960s as the classic Boomer decade, but the false summer of the 1990s was the high-water mark of that ethos

The first great theme of that era was convergence. Walls were coming down. Everybody was coming together.

The second theme was the triumph of classical liberalism. Liberalism was not just a philosophy—it was a spirit and a zeitgeist, a faith that individual freedom would blossom in a loosely networked democratic capitalist world. Enterprise and creativity would be unleashed. America was the great embodiment and champion of this liberation.

The third theme was individualism. Society flourished when individuals were liberated from the shackles of society and the state, when they had the freedom to be true to themselves.

For his 2001 book, Moral Freedom, the political scientist Alan Wolfe interviewed a wide array of Americans. The moral culture he described was no longer based on mainline Protestantism, as it had been for generations

Instead, Americans, from urban bobos to suburban evangelicals, were living in a state of what he called moral freedom: the belief that life is best when each individual finds his or her own morality—inevitable in a society that insists on individual freedom.

moral freedom, like the other dominant values of the time, contained within it a core assumption: If everybody does their own thing, then everything will work out for everybody.

This was an ideology of maximum freedom and minimum sacrifice.

It all looks naive now. We were naive about what the globalized economy would do to the working class, naive to think the internet would bring us together, naive to think the global mixing of people would breed harmony, naive to think the privileged wouldn’t pull up the ladders of opportunity behind them

Over the 20 years after I sat with Kosieva, it all began to unravel. The global financial crisis had hit, the Middle East was being ripped apart by fanatics. On May 15, 2011, street revolts broke out in Spain, led by the self-declared Indignados—“the outraged.” “They don’t represent us!” they railed as an insult to the Spanish establishment. It would turn out to be the cry of a decade.

Millennials and members of Gen Z have grown up in the age of that disappointment, knowing nothing else. In the U.S. and elsewhere, this has produced a crisis of faith, across society but especially among the young. It has produced a crisis of trust.

Social trust is a generalized faith in the people of your community. It consists of smaller faiths. It begins with the assumption that we are interdependent, our destinies linked. It continues with the assumption that we share the same moral values. We share a sense of what is the right thing to do in different situations

gh-trust societies have what Fukuyama calls spontaneous sociability. People are able to organize more quickly, initiate action, and sacrifice for the common good.

When you look at research on social trust, you find all sorts of virtuous feedback loops. Trust produces good outcomes, which then produce more trust. In high-trust societies, corruption is lower and entrepreneurship is catalyzed.

Higher-trust nations have lower economic inequality, because people feel connected to each other and are willing to support a more generous welfare state.

People in high-trust societies are more civically engaged. Nations that score high in social trust—like the Netherlands, Sweden, China, and Australia—have rapidly growing or developed economies.

Renewal is hard to imagine. Destruction is everywhere, and construction difficult to see.

As the ethicist Sissela Bok once put it, “Whatever matters to human beings, trust is the atmosphere in which it thrives.”

During most of the 20th century, through depression and wars, Americans expressed high faith in their institutions

In 1964, for example, 77 percent of Americans said they trusted the federal government to do the right thing most or all of the time.

By 1994, only one in five Americans said they trusted government to do the right thing.

Then came the Iraq War and the financial crisis and the election of Donald Trump. Institutional trust levels remained pathetically low. What changed was the rise of a large group of people who were actively and poi

sonously alienated—who were not only distrustful but explosively distrustful. Explosive distrust is not just an absence of trust or a sense of detached alienation—it is an aggressive animosity and an urge to destroy. Explosive distrust is the belief that those who disagree with you are not just wrong but illegitimate

In 1997, 64 percent of Americans had a great or good deal of trust in the political competence of their fellow citizens; today only a third of Americans feel that way.

In most societies, interpersonal trust is stable over the decades. But for some—like Denmark, where about 75 percent say the people around them are trustworthy, and the Netherlands, where two-thirds say so—the numbers have actually risen.

In America, interpersonal trust is in catastrophic decline. In 2014, according to the General Social Survey conducted by NORC at the University of Chicago, only 30.3 percent of Americans agreed that “most people can be trusted,”

Today, a majority of Americans say they don’t trust other people when they first meet them.

There’s evidence to suggest that marital infidelity, academic cheating, and animal cruelty are all on the rise in America, but it’s hard to directly measure the overall moral condition of society—how honest people are, and how faithful.

Trust is the ratio between the number of people who betray you and the number of people who remain faithful to you. It’s not clear that there is more betrayal in America than there used to be—but there are certainly fewer faithful supports around people than there used to be.

Hundreds of books and studies on declining social capital and collapsing family structure demonstrate this. In the age of disappointment, people are less likely to be surrounded by faithful networks of people they can trust.

Black Americans have high trust in other Black Americans; it’s the wider society they don’t trust, for good and obvious reasons

As Vallier puts it, trust levels are a reflection of the moral condition of a nation at any given time.

high national trust is a collective moral achievement.

High national distrust is a sign that people have earned the right to be suspicious. Trust isn’t a virtue—it’s a measure of other people’s virtue.

Unsurprisingly, the groups with the lowest social trust in America are among the most marginalized.

Black Americans have been one of the most ill-treated groups in American history; their distrust is earned distrust

In 2018, 37.3 percent of white Americans felt that most people can be trusted, according to the General Social Survey, but only 15.3 percent of Black Americans felt the same.

People become trusting when the world around them is trustworthy. When they are surrounded by people who live up to their commitments. When they experience their country as a fair place.

In 2002, 43 percent of Black Americans were very or somewhat satisfied with the way Black people are treated in the U.S. By 2018, only 18 percent felt that way, according to Gallup.

The second disenfranchised low-trust group includes the lower-middle class and the working poor.

this group makes up about 40 percent of the country.

“They are driven by the insecurity of their place in society and in the economy,” he says. They are distrustful of technology and are much more likely to buy into conspiracy theories. “They’re often convinced by stories that someone is trying to trick them, that the world is against them,”

the third marginalized group that scores extremely high on social distrust: young adults. These are people who grew up in the age of disappointment. It’s the only world they know.

In 2012, 40 percent of Baby Boomers believed that most people can be trusted, as did 31 percent of members of Generation X. In contrast, only 19 percent of Millennials said most people can be trusted

Seventy-three percent of adults under 30 believe that “most of the time, people just look out for themselves,” according to a Pew survey from 2018. Seventy-one percent of those young adults say that most people “would try to take advantage of you if they got a chance.

A mere 10 percent of Gen Zers trust politicians to do the right thing.

Only 35 percent of young people, versus 67 percent of old people, believe that Americans respect the rights of people who are not like them.

Fewer than a third of Millennials say America is the greatest country in the world, compared to 64 percent of members of the Silent Generation.

“values and behavior are shaped by the degree to which survival is secure.” In the age of disappointment, our sense of safety went away

Some of this is physical insecurity: school shootings, terrorist attacks, police brutality, and overprotective parenting at home

the true insecurity is financial, social, and emotional.

By the time the Baby Boomers hit a median age of 35, their generation owned 21 percent of the nation’s wealth

First, financial insecurity

As of last year, Millennials—who will hit an average age of 35 in three years—owned just 3.2 percent of the nation’s wealth.

Next, emotional insecurity:

fewer children growing up in married two-parent households, more single-parent households, more depression, and higher suicide rates.

Then, identity insecurity.

All the traits that were once assigned to you by your community, you must now determine on your own: your identity, your morality, your gender, your vocation, your purpose, and the place of your belonging. Self-creation becomes a major anxiety-inducing act of young adulthood.

liquid modernity

Finally, social insecurity.

n the age of social media our “sociometers”—the antennae we use to measure how other people are seeing us—are up and on high alert all the time. Am I liked? Am I affirmed?

Danger is ever present. “For many people, it is impossible to think without simultaneously thinking about what other people would think about what you’re thinking,” the educator Fredrik deBoer has written. “This is exhausting and deeply unsatisfying. As long as your self-conception is tied up in your perception of other people’s conception of you, you will never be free to occupy a personality with confidence; you’re always at the mercy of the next person’s dim opinion of you and your whole deal.”

In this world, nothing seems safe; everything feels like chaos.

Distrust sows distrust. It produces the spiritual state that Emile Durkheim called anomie, a feeling of being disconnected from society, a feeling that the whole game is illegitimate, that you are invisible and not valued, a feeling that the only person you can really trust is yourself.

People plagued by distrust can start to see threats that aren’t there; they become risk averse

Americans take fewer risks and are much less entrepreneurial than they used to be. In 2014, the rate of business start-ups hit a nearly 40-year low. Since the early 1970s, the rate at which people move across state lines each year has dropped by 56 percent

People lose faith in experts. They lose faith in truth, in the flow of information that is the basis of modern society. “A world of truth is a world of trust, and vice versa,”

In periods of distrust, you get surges of populism; populism is the ideology of those who feel betrayed

People are drawn to leaders who use the language of menace and threat, who tell group-versus-group power narratives. You also get a lot more political extremism. People seek closed, rigid ideological systems that give them a sense of security.

fanaticism is a response to existential anxiety. When people feel naked and alone, they revert to tribe. Their radius of trust shrinks, and they only trust their own kind.

When many Americans see Trump’s distrust, they see a man who looks at the world as they do.

By February 2020, America was a land mired in distrust. Then the plague arrived.

From the start, the pandemic has hit the American mind with sledgehammer force. Anxiety and depression have spiked. In April, Gallup recorded a record drop in self-reported well-being, as the share of Americans who said they were thriving fell to the same low point as during the Great Recession

These kinds of drops tend to produce social upheavals. A similar drop was seen in Tunisian well-being just before the street protests that led to the Arab Spring.

The emotional crisis seems to have hit low-trust groups the hardest

“low trusters” were more nervous during the early months of the pandemic, more likely to have trouble sleeping, more likely to feel depressed, less likely to say the public authorities were responding well to the pandemic

Eighty-one percent of Americans under 30 reported feeling anxious, depressed, lonely, or hopeless at least one day in the previous week, compared to 48 percent of adults 60 and over.

Americans looked to their governing institutions to keep them safe. And nearly every one of their institutions betrayed them

The president downplayed the crisis, and his administration was a daily disaster area

The Centers for Disease Control and Prevention produced faulty tests, failed to provide up-to-date data on infections and deaths, and didn’t provide a trustworthy voice for a scared public.

The Food and Drug Administration wouldn’t allow private labs to produce their own tests without a lengthy approval process.

In nations that ranked high on the World Values Survey measure of interpersonal trust—like China, Australia, and most of the Nordic states—leaders were able to mobilize quickly, come up with a plan, and count on citizens to comply with the new rules.

In low-trust nations—like Mexico, Spain, and Brazil—there was less planning, less compliance, less collective action, and more death.

Countries that fell somewhere in the middle—including the U.S., Germany, and Japan—had a mixed record depending on the quality of their leadership.

South Korea, where more than 65 percent of people say they trust government when it comes to health care, was able to build a successful test-and-trace regime. In America, where only 31 percent of Republicans and 44 percent of Democrats say the government should be able to use cellphone data to track compliance with experts’ coronavirus social-contact guidelines, such a system was never really implemented.

For decades, researchers have been warning about institutional decay. Institutions get caught up in one of those negative feedback loops that are so common in a world of mistrust. They become ineffective and lose legitimacy. People who lose faith in them tend not to fund them. Talented people don’t go to work for them. They become more ineffective still.

On the right, this anti-institutional bias has manifested itself as hatred of government; an unwillingness to defer to expertise, authority, and basic science; and a reluctance to fund the civic infrastructure of society, such as a decent public health system

On the left, distrust of institutional authority has manifested as a series of checks on power that have given many small actors the power to stop common plans, producing what Fukuyama calls a vetocracy

In 2020, American institutions groaned and sputtered. Academics wrote up plan after plan and lobbed them onto the internet. Few of them went anywhere. America had lost the ability to build new civic structures to respond to ongoing crises like climate change, opioid addiction, and pandemics, or to reform existing ones.

In a lower-trust era like today, Levin told me, “there is a greater instinct to say, ‘They’re failing us.’ We see ourselves as outsiders to the systems—an outsider mentality that’s hard to get out of.”

Americans haven’t just lost faith in institutions; they’ve come to loathe them, even to think that they are evil

55 percent of Americans believe that the coronavirus that causes COVID-19 was created in a lab and 59 percent believe that the U.S. government is concealing the true number of deaths

Half of all Fox News viewers believe that Bill Gates is plotting a mass-vaccination campaign so he can track people.

This spring, nearly a third of Americans were convinced that it was probably or definitely true that a vaccine existed but was being withheld by the government.

institutions like the law, the government, the police, and even the family don’t merely serve social functions, Levin said; they form the individuals who work and live within them. The institutions provide rules to live by, standards of excellence to live up to, social roles to fulfill.

By 2020, people had stopped seeing institutions as places they entered to be morally formed,

Instead, they see institutions as stages on which they can perform, can display their splendid selves.

People run for Congress not so they can legislate, but so they can get on TV. People work in companies so they can build their personal brand.

The result is a world in which institutions not only fail to serve their social function and keep us safe, they also fail to form trustworthy people. The rot in our structures spreads to a rot in ourselves.

The Failure of Society

The coronavirus has confronted America with a social dilemma. A social dilemma, the University of Pennsylvania scholar Cristina Bicchieri notes, is “a situation in which each group member gets a higher outcome if she pursues her individual self-interest, but everyone in the group is better off if all group members further the common interest.”

Social distancing is a social dilemma. Many low-risk individuals have been asked to endure some large pain (unemployment, bankruptcy) and some small inconvenience (mask wearing) for the sake of the common good. If they could make and keep this moral commitment to each other in the short term, the curve would be crushed, and in the long run we’d all be better off. It is the ultimate test of American trustworthiness.

While pretending to be rigorous, people relaxed and started going out. It was like watching somebody gradually give up on a diet. There wasn’t a big moment of capitulation, just an extra chocolate bar here, a bagel there, a scoop of ice cream before bed

in reality this was a mass moral failure of Republicans and Democrats and independents alike. This was a failure of social solidarity, a failure to look out for each other.

Alexis de Tocqueville discussed a concept called the social body. Americans were clearly individualistic, he observed, but they shared common ideas and common values, and could, when needed, produce common action. They could form a social body.

Over time, those common values eroded, and were replaced by a value system that put personal freedom above every other value

When Americans were confronted with the extremely hard task of locking down for months without any of the collective resources that would have made it easier—habits of deference to group needs; a dense network of community bonds to help hold each other accountable; a history of trust that if you do the right thing, others will too; preexisting patterns of cooperation; a sense of shame if you deviate from the group—they couldn’t do it. America failed.

The Crack-up

This wasn’t just a political and social crisis, it was also an emotional trauma.

The week before George Floyd was killed, the National Center for Health Statistics released data showing that a third of all Americans were showing signs of clinical anxiety or depression. By early June, after Floyd’s death, the percentage of Black Americans showing clinical signs of depression and anxiety disorders had jumped from 36 to 41 percent

By late June, American national pride was lower than at any time since Gallup started measuring, in 2001

In another poll, 71 percent of Americans said they were angry about the state of the country, and just 17 percent said they were proud.

By late June, it was clear that America was enduring a full-bore crisis of legitimacy, an epidemic of alienation, and a loss of faith in the existing order.

The most alienated, anarchic actors in society—antifa, the Proud Boys, QAnon—seemed to be driving events. The distrust doom loop was now at hand.

The Age of Precarity

Cultures are collective responses to common problems. But when reality changes, culture takes a few years, and a moral convulsion, to completely shake off the old norms and values.

The culture that is emerging, and which will dominate American life over the next decades, is a response to a prevailing sense of threat.

This new culture values security over liberation, equality over freedom, the collective over the individual.

From risk to security.

we’ve entered an age of precarity in which every political or social movement has an opportunity pole and a risk pole. In the opportunity mentality, risk is embraced because of the upside possibilities. In the risk mindset, security is embraced because people need protection from downside dangers

In this period of convulsion, almost every party and movement has moved from its opportunity pole to its risk pole.

From achievement to equality

In the new culture we are entering, that meritocratic system looks more and more like a ruthless sorting system that excludes the vast majority of people, rendering their life precarious and second class, while pushing the “winners” into a relentless go-go lifestyle that leaves them exhausted and unhappy

Equality becomes the great social and political goal. Any disparity—racial, economic, meritocratic—comes to seem hateful.

From self to society

If we’ve lived through an age of the isolated self, people in the emerging culture see embedded selves. Socialists see individuals embedded in their class group. Right-wing populists see individuals as embedded pieces of a national identity group. Left-wing critical theorists see individuals embedded in their racial, ethnic, gender, or sexual-orientation identity group.

The cultural mantra shifts from “Don’t label me!” to “My label is who I am.”

From global to local

When there is massive distrust of central institutions, people shift power to local institutions, where trust is higher. Power flows away from Washington to cities and states.

From liberalism to activism

enlightenment liberalism, which was a long effort to reduce the role of passions in politics and increase the role of reason. Politics was seen as a competition between partial truths.

Liberalism is ill-suited for an age of precarity. It demands that we live with a lot of ambiguity, which is hard when the atmosphere already feels unsafe. Furthermore, it is thin. It offers an open-ended process of discovery when what people hunger for is justice and moral certainty.

liberalism’s niceties come to seem like a cover that oppressors use to mask and maintain their systems of oppression. Public life isn’t an exchange of ideas; it’s a conflict of groups engaged in a vicious death struggle

The cultural shifts we are witnessing offer more safety to the individual at the cost of clannishness within society. People are embedded more in communities and groups, but in an age of distrust, groups look at each other warily, angrily, viciously.

The shift toward a more communal viewpoint is potentially a wonderful thing, but it leads to cold civil war unless there is a renaissance of trust. There’s no avoiding the core problem. Unless we can find a way to rebuild trust, the nation does not function.

How to Rebuild Trust

Historians have more to offer, because they can cite examples of nations that have gone from pervasive social decay to relative social health. The two most germane to our situation are Great Britain between 1830 and 1848 and the United States between 1895 and 1914.

In both periods, a highly individualistic and amoral culture was replaced by a more communal and moralistic one.

But there was a crucial difference between those eras and our own, at least so far. In both cases, moral convulsion led to frenetic action.

As Robert Putnam and Shaylyn Romney Garrett note in their forthcoming book, The Upswing, the American civic revival that began in the 1870s produced a stunning array of new organizations: the United Way, the NAACP, the Boy Scouts, the Forest Service, the Federal Reserve System, 4-H clubs, the Sierra Club, the settlement-house movement, the compulsory-education movement, the American Bar Association, the American Legion, the ACLU, and on and on

After the civic revivals, both nations witnessed frenetic political reform. During the 1830s, Britain passed the Reform Act, which widened the franchise; the Factory Act, which regulated workplaces; and the Municipal Corporations Act, which reformed local government.

The Progressive Era in America saw an avalanche of reform: civil-service reform; food and drug regulation; the Sherman Act, which battled the trusts; the secret ballot; and so on. Civic life became profoundly moralistic, but political life became profoundly pragmatic and anti-ideological. Pragmatism and social-science expertise were valued.

Can America in the 2020s turn itself around the way the America of the 1890s, or the Britain of the 1830s, did? Can we create a civic renaissance and a legislative revolution?

I see no scenario in which we return to being the nation we were in 1965, with a cohesive national ethos, a clear national establishment, trusted central institutions, and a pop-culture landscape in which people overwhelmingly watch the same shows and talked about the same things.

The age of distrust has smashed the converging America and the converging globe—that great dream of the 1990s—and has left us with the reality that our only plausible future is decentralized pluralism.

The key to making decentralized pluralism work still comes down to one question: Do we have the energy to build new organizations that address our problems, the way the Brits did in the 1830s and Americans did in the 1890s?

social trust is built within organizations in which people are bound together to do joint work, in which they struggle together long enough for trust to gradually develop, in which they develop shared understandings of what is expected of each other, in which they are enmeshed in rules and standards of behavior that keep them trustworthy when their commitments might otherwise falter.

Over the past 60 years, we have given up on the Rotary Club and the American Legion and other civic organizations and replaced them with Twitter and Instagram. Ultimately, our ability to rebuild trust depends on our ability to join and stick to organizations.

Whether we emerge from this transition stronger depends on our ability, from the bottom up and the top down, to build organizations targeted at our many problems. If history is any guide, this will be the work not of months, but of one or two decades.

For centuries, America was the greatest success story on earth, a nation of steady progress, dazzling achievement, and growing international power. That story threatens to end on our watch, crushed by the collapse of our institutions and the implosion of social trust

But trust can be rebuilt through the accumulation of small heroic acts—by the outrageous gesture of extending vulnerability in a world that is mean, by proffering faith in other people when that faith may not be returned. Sometimes trust blooms when somebody holds you against all logic, when you expected to be dropped.

By David Brooks

Before this study, continuous temperature record reconstruction only went back about 2,000 years. The temperature trend produces a line shaped like a "hockey stick" with a sudden spike after what had been a fairly steady line. That data came from tree rings, ice cores and lake sediments.

the general downward trend of temperatures that reversed 100 years ago seemed to indicate the Earth was heading either toward another ice age or little ice age from about 1550 to 1850. Or it was continuing to cool naturally until greenhouse gases from the burning of fossil fuels changed everything.

"We have, through human emissions of carbon dioxide and other heat-trapping gases, indefinitely delayed the onset of the next ice age and are now heading into an unknown future where humans control the thermostat of the planet,

This research sheds interesting light on how humans have influenced and continue to influence the climate. It's a complicated relationship and our knowledge is always evolving.

He also suggests humans are more powerful than they realize. "The bottom line is that we are basically skipping a whole glacial cycle, which is unprecedented.

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.