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“So far we’re seeing basic agreement with our best model of the universe, but we’re also seeing some potentially interesting differences that could indicate that dark energy is evolving with time,”

When the scientists combined their map with other cosmological data, they were surprised to find that it did not quite agree with the otherwise reliable standard model of the universe, which assumes that dark energy is constant and unchanging. A varying dark energy fit the data points better.

“It’s certainly more than a curiosity,” Dr. Palanque-Delabrouille said. “I would call it a hint. Yeah, it’s not yet evidence, but it’s interesting.”

But this version of dark energy is merely the simplest one. “With DESI we now have achieved a precision that allows us to go beyond that simple model,” Dr. Palanque-Delabrouille said, “to see if the density of dark energy is constant over time, or if it has some fluctuations and evolution with time.”

“While combining data sets is tricky, and these are early results from DESI, the possible evidence that dark energy is not constant is the best news I have heard since cosmic acceleration was firmly established 20-plus years ago.”

praised the new survey as “superb data.” The results, she said, “open the potential for a new window into understanding dark energy, the dominant component of the universe, which remains the biggest mystery in cosmology. Pretty exciting.”

what if dark energy were not constant as the cosmological model assumed?

At issue is a parameter called w, which is a measure of the density, or vehemence, of the dark energy. In Einstein’s version of dark energy, this number remains constant, with a value of –1, throughout the life of the universe. Cosmologists have been using this value in their models for the past 25 years.

Dark energy took its place in the standard model of the universe known as L.C.D.M., composed of 70 percent dark energy (Lambda), 25 percent cold dark matter (an assortment of slow-moving exotic particles) and 5 percent atomic matter. So far that model has been bruised but not broken by the new James Webb Space Telescope

As a measure of distance, the researchers used bumps in the cosmic distribution of galaxies, known as baryon acoustic oscillations. These bumps were imprinted on the cosmos by sound waves in the hot plasma that filled the universe when it was just 380,000 years old. Back then, the bumps were a half-million light-years across. Now, 13.5 billion years later, the universe has expanded a thousandfold, and the bumps — which are now 500 million light-years across — serve as convenient cosmic measuring sticks.

The DESI scientists divided the past 11 billion years of cosmic history into seven spans of time. (The universe is 13.8 billion years old.) For each, they measured the size of these bumps and how fast the galaxies in them were speeding away from us and from each other.

When the researchers put it all together, they found that the usual assumption — a constant dark energy — didn’t work to describe the expansion of the universe. Galaxies in the three most recent epochs appeared closer than they should have been, suggesting that dark energy could be evolving with time.

Dr. Riess of Johns Hopkins, who had an early look at the DESI results, noted that the “hint,” if validated, could pull the rug out from other cosmological measurements, such as the age or size of the universe. “This result is very interesting and we should take it seriously,” he wrote in his email. “Otherwise why else do we do these experiments?”

Kulkarni likened the rise of hate against Asian Americans since the pandemic began to the 19th century era of "yellow peril," during which racist laws as well as stereotypes of East Asian immigrants as a threat to society proliferated in the US.

From then through the end of 2020, the organization received more than 2,800 firsthand reports of anti-Asian hate across 47 states and Washington, DC, according to data released this week.

The majority of those incidents -- about 71% -- were cases of verbal harassment, while shunning or avoidance made up about 21%. About 9% of the incidents involved physical assaults, and 6% included being purposely coughed or spit on, according to a Stop AAPI Hate news release.

A report published Wednesday by the Asian American Bar Association of New York noted that from January 1 to November 1, 2020, the New York Police Department saw an eight-fold increase in reported anti-Asian hate crimes compared to the same period in 2019.

From 2017 to 2019, the organization received less than 500 reported instances of hate against Asian Americans. But from February to December last year, they said they estimate there have been 3,000 incidents of hate cataloged by their group and others.

Yang attributes the rise of anti-Asian hate in the US partially to former President Donald Trump, who repeatedly referred to the coronavirus as the "China virus" in the early days of the pandemic.

Experts also blame the insecurity and fear brought on by the pandemic. People may respond to threats of disease or other crises by scapegoating another group perceived as falling outside the cultural norms -- in this case Asian Americans, the authors of the Asian American Bar Association report wrote.

Asian Americans are seen as easy targets for crime, perhaps because of language and cultural barriers that might prevent them from reporting incidents, according to Yang. And the elderly are particularly vulnerable, with concerns that they could be targeted for robberies as they are out shopping for the Lunar New Year.

But community leaders say that more needs to be done.Both Kulkarni and Yang are calling on community solutions to help address the problem. Yang called for bystander intervention training and local efforts such as neighborhood walk services and shopping services for the elderly. Kulkarni has called for more support and resources for Asian Americans to help them address incidents of assault and harassment.

The cost: The participating counties and municipalities are contributing to a $4bn statewide spend, including Miami Beach’s $400m Forever Bond, a $1bn stormwater plan and $250m of improvements to Broward county’s sewage systems to protect against flooding and seawater seepage. In the Keys, many consider the estimated $60m a mile cost of raising roads too expensive.

The threat: Saltwater from sea level rise is seeping further inland through Florida’s porous limestone bedrock and contaminating underground freshwater supplies, notably in the Biscayne aquifer, the 4,000-sq mile shallow limestone basin that provides drinking water to millions in southern Florida. Years of over-pumping and toxic runoff from farming and the sugar industry in central Florida and the Everglades have worsened the situation. The Florida department of environmental protection warned in March that “existing sources of water will not adequately meet the reasonable beneficial needs for the next 20 years”. A rising water table, meanwhile, has exacerbated problems with south Florida’s ageing sewage systems. Since December, millions of gallons of toxic, raw sewage have spilled on to Fort Lauderdale’s streets from a series of pipe failures.

The cost: The Everglades restoration plan was originally priced at $7.8bn, rose to $10.5bn, and has since ballooned to $16.4bn. Donald Trump’s proposed 2021 federal budget includes $250m for Everglades restoration. The estimated $1.8bn cost of the reservoir will be split between federal and state budgets.

Possible solutions

The cost: With homeowners and businesses largely bearing their own costs, the specific amount spent on “hurricane-proofing” in Florida is impossible to know. A 2018 Pew research study documented $1.3bn in hazard mitigation grants from federal and state funding in 2017, along with a further $8bn in post-disaster grants. Florida is spending another $633m from the US Department of Housing and Urban Development on resiliency planning.

Wildlife and habitat loss The threat: Florida’s native flora and fauna are being devastated by climate change, with the Florida Natural Areas Inventory warning that a quarter of the 1,200 species it tracks is set to lose more than half their existing habitat, and the state’s beloved manatees and Key deer are at risk of extinction. Warmer and more acidic seas reduce other species’ food stocks and exacerbate the deadly red-tide algal blooms that have killed incalculable numbers of fish, turtles, dolphins and other marine life. Bleaching and stony coral tissue disease linked to the climate crisis threaten to hasten the demise of the Great Florida Reef, the only living coral reef in the continental US. Encroaching saltwater has turned Big Pine Key, a crucial deer habitat, into a ghost forest.

As for the Key deer, of which fewer than 1,000 remain, volunteers leave clean drinking water to replace salt-contaminated watering holes as herds retreat to higher ground. A longer-term debate is under way on the merits and ethics of relocating the species to other areas of Florida or the US.

Coastal erosion The threat: Tourist brochures showcase miles of golden, sandy beaches in South Florida, but the reality is somewhat different. The Florida department of environmental protection deems the entire coastline from Miami to Cape Canaveral “critically eroded”, the result of sea level rise, historically high tides and especially storm surges from a succession of powerful hurricanes. In south-eastern Florida’s Palm Beach, Broward, Miami-Dade and Monroe counties, authorities are waging a continuous war on sand loss, eager to maintain their picture-perfect image and protect two of their biggest sources of income, tourism dollars and lucrative property taxes from waterfront homes and businesses.

In the devastating hurricane season just one year before, major storms named Harvey, Maria and Irma combined to cause damage estimated at $265bn. Scientists have evidence the climate crisis is causing cyclones to be more powerful, and intensify more quickly, and Florida’s position at the end of the Atlantic Ocean’s “hurricane alley” makes it twice as vulnerable as any other state.

With the other option abandoning beaches to the elements, city and county commissions have little choice but costly replenishment projects with sand replacement and jetty construction. Federal law prohibits the importation of cheaper foreign sand, so the municipalities must source a more expensive alternative from US markets, often creating friction with residents who don’t want to part with their sand. Supplementary to sand replenishment, the Nature Conservancy is a partner in a number of nature-based coastal defense projects from West Palm Beach to Miami.

benefited from 61,000 cubic yards of new sand this year at a cost of $16m. Statewide, Florida spends an average $50m annually on beach erosion.

The threat: “Climate gentrification” is a buzzword around south Florida, a region barely 6ft above sea level where land has become increasingly valuable in elevated areas. Speculators and developers are eyeing historically black, working-class and poorer areas, pushing out long-term residents and replacing affordable housing with upscale developments and luxury accommodations that only the wealthy can afford.

No study has yet calculated the overall cost of affordable housing lost to the climate crisis. Private developers will bear the expense of mitigating the impact on the neighborhood – $31m in Magic City’s case over 15 years to the Little Haiti Revitalization Trust, largely for new “green” affordable housing. The University of Miami’s housing solutions lab has a $300,000 grant from JPMorgan to report on the impact of rising seas to South Florida’s affordable housing stocks and recommend modifications to prevent it from flooding and other climate events. A collaboration of not-for-profit groups is chasing $75m in corporate funding for affordable housing along the 70-mile south Florida rail trail from Miami to West Palm Beach, with the first stage, a $5m project under way to identify, build and renovate 300 units.

Florida has long been plagued by political leadership more in thrall to the interests of big industry than the environment. As governor from 2011 to 2019, Rick Scott, now a US senator, slashed $700m from Florida’s water management budget, rolled back environmental regulations and enforcement, gave a free ride to polluters, and flip-flopped over expanding offshore oil drilling. The politician who came to be known as “Red Tide Rick”, for his perceived inaction over 2018’s toxic algae bloom outbreaks, reportedly banned the words “climate change” and “global warming” from state documents.

Last month, state legislators approved the first dedicated climate bill. It appears a promising start for a new administration, but activists say more needs to be done. In January, the Sierra Club awarded DeSantis failing grades in an environmental report card, saying he failed to protect Florida’s springs and rivers and approved new roads that threatened protected wildlife.

The cost: Florida’s spending on the environment is increasing. The state budget passed last month included $650m for Everglades restoration and water management projects (an instalment of DeSantis’s $2.5bn four-year pledge) and $100m for Florida Forever. A $100m bridge project jointly funded by the state and federal governments will allow the free flow of water under the Tamiami Trail for the first time in decades.

Florida has woken up to the threat of climate change but it is not yet clear how effective the response will be. The challenges are innumerable, the costs immense and the political will to fix or minimize the issues remains questionable, despite recent progress. At stake is the very future of one of the largest and most diverse states in the nation, in terms of both its population and its environment. Action taken now will determine its survival.

To achieve this goal, countries that signed on to the agreement promised that they would focus on cultivating clean, renewable energy sources and shift from the use of fossil fuels. They will also be required to report on their progress in reducing greenhouse gas emissions every five years.

The deal also commits countries to deliver $100 billion a year in aid for developing countries by 2020, with a promise to increase financing in the future.

In a preamble, the deal doubles down on a pledge made six years ago, that richer, industrialized countries will contribute at least $100 billion of aid a year to poorer nations to help them battle the effects of climate change by 2020. It also promises that countries will consider increases to that amount in the future.

So there may be many vested parties with a stake in the climate change deal -- but there are also a few key winners and losers. We take a look at them here:

According to the Internal Displacement Monitoring Centre's (IDMC) 2015 Global Estimates report, "an average of 26.4 million people per year have been displaced from their homes by disasters brought on by natural hazards" since 2008. These threatened populations are largely found in developing countries, which tend to be more vulnerable to rises in sea level, droughts, and floods.

The climate accord in Paris, however, have many in the developing world cheering.

According to President Obama, the targets are bold, but they also empower "businesses, scientists, engineers, workers, and the private sector -- investors -- to work together."

In fact, the aid money already seems to be flowing in light of the Paris negotiations: early this week, the U.S. promised to double its own aid to affected countries to $861 million as part of last-ditch efforts to push the climate deal through.

Some nations were not entirely satisfied with the final language -- there is still, after all, no legally binding provision that holds industrialized countries to this pledge for "adaptation" funds -- but nonetheless, Adow said, it gives significant hope to those countries hit especially hard with the threat of displaced citizens.

Mohamed Adow, senior climate change adviser from the disaster relief agency Christian Aid, told CBS News that this is one of the most important aspects of the COP21 accord: the promise provides poorer nations with the "assurance that the international community will not leave developing countries to deal with climate impact."

The effects of climate change in poor and developing nations also pose an increasing terror threat to the United States -- a connection that President Obama has made in the past, when he called global warming "an economic and security imperative" just weeks after the Nov. 13 attacks in Paris.

As Democratic presidential candidate Bernie Sanders explained it on CBS' "Face the Nation" in November: "If we are going to see an increase in drought, in flood, and extreme weather disturbances as a result of climate change, what that means is that people all over the world are going to be fighting over limited natural resources... When people migrate into cities and they don't have jobs, there's going to be a lot more instability, a lot more unemployment, and people will be subject to the types of propaganda that al Qaeda and ISIS are using right now."

Military reports have also viewed climate change as a "catalyst for conflict," and the Pentagon's Quadrennial Defense Review last year dubbed its effects as "threat multipliers" that ultimately lead to "conditions that can enable terrorist activity and other forms of violence."

But the climate change deal seeks to mitigate these possible conflict catalysts so that "countries that don't have the resources to address these problems head on, now will," Jon Powers, who served the Federal Chief Sustainability Officer and Special Advisor on Energy to the U.S. Army in the Obama Administration, told CBS News.

One important target put forth by the deal was to ensure that parties would "undertake rapid reductions thereafter in accordance with best available science, so as to achieve a balance between anthropogenic emissions by sources and removals by sinks of greenhouse gases in the second half of this century."

Here, the deal aims to strangle heavy carbon-emitting industries -- the "anthropogenic emissions" -- and cut down on total fossil fuels burned worldwide. Importantly, it's also a nod to investment in and development of new technologies that would remove carbon dioxide from the air.

U.S. Energy Secretary Ernest Moniz told CNBC in an interview, "We recognize fossil fuels will continue to be a part of the portfolio for quite a long time," but that the popularity of other power sources are on the rise.

"Wind energy has gone up by several fold just in the last five to six years," Moniz said, "and now (wind) provides about 4.5 percent of our electricity. You add that with solar, we're talking 5 percent."

Kathleen McLaughlin, the chief sustainability officer for Walmart, said in a statement that the company would "support the U.N.'s call for the U.S. corporate sector to commit to science-based targets to reduce emissions."

Ahead of the Paris summit, China -- the world's biggest coal consumer -- said it would aim to cut its greenhouse gas emissions by nearly two-thirds of its 2005 levels. In the past, international monitoring of those numbers would have been difficult to do, but the COP21 deal changes that.

The agreement holds nations accountable for reporting their progress on their climate goals in a global "stocktake" every five years starting in 2023. It also means countries will be monitoring, verifying and reporting their greenhouse gas emissions in a single accounting system.

According to one report released last month by the carbon investment think tank Carbon Tracker, fossil fuel companies could risk over $2 trillion dollars of current and future projects being left valueless as the market for fossil fuels narrows with recent global climate change action.

Mark Osler, a former federal prosecutor and now a professor at the University of St. Thomas School of Law, said it's not unusual for attorneys to make these kinds of requests as a sort of "opening offer." He said there is zero chance that Chauvin will get probation, and prosecutors are also unlikely to get the 30 years they are requesting.

Chauvin was convicted in April of second-degree unintentional murder, third-degree murder and second-degree manslaughter for pressing his knee against Floyd's neck for about 9 1/2 minutes as the Black man said he couldn't breathe and went motionless. Floyd's death, captured on widely seen bystander video, set off demonstrations around the United States and beyond as protesters demanded changes in policing.

Even though Chauvin was found guilty of three counts, he'll only be sentenced on the most serious one — second-degree murder. Under Minnesota sentencing guidelines, with no criminal record he faces a presumptive sentence of 12 1/2 years on that count. Cahill can sentence him to as little as 10 years and eight months or as much as 15 years and stay within the guideline range.

Prosecutors said that even one of those factors would warrant the higher sentence.

"In spite of the notoriety surrounding this case, the Court must look to the facts. They all point to the single most important fact: Mr. Chauvin did not intend to cause George Floyd's death. He believed he was doing his job," he wrote.

Nelson is also seeking a new trial for Chauvin — which is a fairly routine request after a conviction. He argued extensive pretrial publicity tainted the jury pool and denied Chauvin his right to a fair trial. He also said Cahill also abused his authority when he declined defense requests to move the trial out of Minneapolis and sequester the jury.

Nelson is also asking for a hearing to investigate whether there was juror misconduct. Nelson alleged that an alternate juror who made public comments indicated she felt pressured to render a guilty verdict, and another juror who deliberated did not follow jury instructions and was not candid during jury selection. That juror, Brandon Mitchell, did not mention that he had participated in an Aug. 28 march in Washington, D.C., to honor Martin Luther King Jr.

Chauvin has also been indicted on federal charges alleging he violated Floyd's civil rights, as well as the civil rights of a 14-year-old he restrained in a 2017 arrest. The three other former officers involved in Floyd's death were also charged with federal civil rights violations; they await trial in state court on aiding and abetting counts.A federal trial date has not been set. Federal prosecutors are asking for more time to prepare for trial, saying the case is complex because of the sheer volume of evidence and the separate but coordinated state and federal investigations.

Rather than provide housing for the homeless, cities offer showers, day care centers and bag checks.

We have decided to live with the fact that some of our fellow Americans will die on the streets.

“There’s a cruelty here that I don’t think I’ve seen,” Leilani Farha, then the United Nations special rapporteur on adequate housing, said after a 2018 visit to Northern California.

“I’ve never seen anything like it, and I’ve done outreach on every continent,” Dame Louise Casey, who directed homeless policy for several British prime ministers, said after touring homeless encampments in San Francisco, Los Angeles and other American cities.

almost 40 percent of workers in households making less than $40,000 a year have lost work. Women in Need NYC, which runs shelters, warned this week that New York faces a “mass increase” in homelessness

Countries confronting homelessness with greater success than the United States, including Finland and Japan, begin by treating housing as a human right

the first law of real estate applies to homelessness, too: Location, location, location. The nation’s homeless population is concentrated in New York, the cities of coastal California and a few other islands of prosperity.

Well-educated, well-paid professionals have flocked to those places, driving up housing prices. And crucially, those cities and their suburbs have made it virtually impossible to build enough housing to keep up.

The government calculates $600 is the most a family living at the poverty line can afford to pay in monthly rent while still having enough money for food, health care and other needs. From 1990 to 2017, the number of housing units available below that price shrank by four million.

While there are roughly 80,000 homeless people in New York on any given night, more than 800,000 New Yorkers — more than 10 times as many people — are scraping by, spending more than half their income on rent.

According to one analysis, a $100 increase in the average monthly rent in a large metro area is associated with a 15 percent increase in homelessness.

In 2018, eight out of every 10,000 Michigan residents were homeless. In California, it was 33 per 10,000. In New York, it was 46 per 10,000.

in recent decades, wealth and homelessness have both increased — a stark illustration of the inequalities that pervade American life.

Having failed to address homelessness during the longest economic expansion in American history, the nation now faces a greater challenge under more difficult circumstances

Reframing the debate — asking what is necessary to end homelessness — is an important first step for New York and for other places that are failing this basic test of civic responsibility.

The program costs about $19 billion a year. Vouchers for all eligible households would cost another $41 billion a year

Where to get the money? Well, the government annually provides more than $70 billion in tax breaks to homeowners, including a deduction for mortgage interest payments and a free pass on some capital gains from home sales. Let’s end homelessness instead of subsidizing mansions.

Without a significant expansion in the supply of housing, adding vouchers would be like adding players to a game of musical chairs without increasing the number of chairs.

Market-rate construction can help: More housing would slow the upward march of housing prices. New York and San Francisco are the nation’s most tightly regulated markets for housing construction,

Tokyo, often cited as an international model for its permissive development policies, has expanded its supply of homes by roughly 2 percent a year in recent years, while New York’s housing supply has expanded by roughly 0.5 percent a year. Over the last two decades, housing prices in Tokyo held steady as New York prices soared.

In California, for example, construction of a five-story apartment building that meets minimum standards costs an average of $425,000 per unit,

Without public aid, the apartments would need to be rented for several times more than the $600 a month affordable to a family living at the poverty line.

Proposals for a big increase in affordable housing construction inevitably call to mind the troubled public housing projects of the mid-20th century. They offer one clear lesson: Avoid housing that concentrates poverty

there is a solution — to build subsidized housing as part of mixed-income developments and to spread the developments out, putting them not just in cities but also in the surrounding suburbs.

Helsinki, Finland, a city of just 600,000 people, builds about 7,000 units of mixed-income housing a year. That’s a big reason Finland is the rare European country where homelessness is in decline.

Extending this approach to the entire homeless population would be expensive. To take one example, King County, which encompasses Seattle, would need to increase annual spending on homelessness to roughly $410 million from $196 million to help each of the county’s 22,000 homeless families, according to a study by McKinsey. That’s about $19,000 per family.

Even if the cost per person were twice as high, the nation’s homeless population could be housed for $10 billion a year — less than the price of one aircraft carrier.

there is worse to come. Homelessness rises during recessions, the federal funding is temporary and state and local governments face huge drops in tax revenue.

The federal government already provides housing vouchers to help some lower-income families. The families pay 30 percent of their monthly income toward rent; the government pays the rest. But instead of giving vouchers to every needy family, the government imposes an arbitrary cap. Three in four eligible families don’t get vouchers.

Americans must decide whether we are willing to let elementary school students spend nights in guarded parking lots

We must decide whether it’s worth spending just a little of this nation’s vast wealth to ensure that no 60-year-old woman needs to sleep on the same bench in downtown Santa Monica

In War and Peace and War (2006), his most accessible book, he likens himself to Hari Seldon, the “maverick mathematician” of Isaac Asimov’s Foundation series, who can foretell the rise and fall of empires. In those 10,000 years’ worth of data, Turchin believes he has found iron laws that dictate the fates of human societies.

The fate of our own society, he says, is not going to be pretty, at least in the near term. “It’s too late,”

The problems are deep and structural—not the type that the tedious process of demo­cratic change can fix in time to forestall mayhem.

Turchin likens America to a huge ship headed directly for an iceberg: “If you have a discussion among the crew about which way to turn, you will not turn in time, and you hit the iceberg directly.” The past 10 years or so have been discussion. That sickening crunch you now hear—steel twisting, rivets popping—­­is the sound of the ship hitting the iceberg.

Of the three factors driving social violence, Turchin stresses most heavily “elite overproduction”—­the tendency of a society’s ruling classes to grow faster than the number of positions for their members to fill.

Don’t we want everyone to be rich and educated? The problems begin when money and Harvard degrees become like royal titles in Saudi Arabia. If lots of people have them, but only some have real power, the ones who don’t have power eventually turn on the ones who do.

“You have a situation now where there are many more elites fighting for the same position, and some portion of them will convert to counter-elites,” Turchin said.

Elite jobs do not multiply as fast as elites do. There are still only 100 Senate seats, but more people than ever have enough money or degrees to think they should be running the country

Turchin noted that a person can be part of an ideological elite rather than an economic one.

Elite overproduction creates counter-elites, and counter-elites look for allies among the commoners. If commoners’ living standards slip—not relative to the elites, but relative to what they had before—they accept the overtures of the counter-elites and start oiling the axles of their tumbrels

Commoners’ lives grow worse, and the few who try to pull themselves onto the elite lifeboat are pushed back into the water by those already aboard.

The final trigger of impending collapse, Turchin says, tends to be state insolvency. At some point rising in­security becomes expensive. The elites have to pacify unhappy citizens with handouts and freebies—and when these run out, they have to police dissent and oppress people.

Eventually the state exhausts all short-term solutions, and what was heretofore a coherent civilization disintegrates.

“I gave up because I solved the problem.” Turchin published one final monograph, Complex Population Dynamics: A Theoretical / Empirical Synthesis (2003), then broke the news to his UConn colleagues that he would be saying a permanent sayonara to the field

“Does population ecology have general laws?” Turchin asked. Most ecologists said no: Populations have their own dynamics, and each situation is different.

All sciences go through this transition to mathematization,” Turchin told me. “When I had my midlife crisis, I was looking for a subject where I could help with this transition to a mathematized science. There was only one left, and that was history.”

After its long adolescence of collecting and cataloging, ecology had enough data to describe these universal laws—and to stop pretending that every species had its own idiosyncrasies. “Ecologists know these laws and should call them laws,” he said.

The laws Turchin applied to ecology—and his insistence on calling them laws—­generated respectful controversy at the time. Now they are cited in textbooks.

Having left ecology, Turchin began similar research that attempted to formulate general laws for a different animal species: human beings.

Turchin suggested that “there are several very general law-like propositions” that could be applied to ecology.

If the historians weren’t going to usher in a mathematical revolution themselves, he would storm their departments and do it for them.

“There is a longstanding debate among scientists and philosophers as to whether history has general laws,” he and a co-author wrote in Secular Cycles (2009). “A basic premise of our study is that historical societies can be studied with the same methods physicists and biologists used to study natural systems.”

he likened historians reluctant to build general principles to his colleagues in biology “who care most for the private life of warblers.” “Let history continue to focus on the particular,” he wrote. Cliodynamics would be a new science

To seed the journal’s research, Turchin masterminded a digital archive of historical and archaeological data.

The coding of its records requires finesse, he told me, because (for example) the method of determining the size of the elite-aspirant class of medieval France might differ from the measure of the same class in the present-day United States. (For medieval France, a proxy is the membership in its noble class, which became glutted with second and third sons who had no castles or manors to rule over. One American proxy, Turchin says, is the number of lawyers.)

Historians of religion have long pondered the relationship between the rise of complex civilization and the belief in gods—especially “moralizing gods,” the kind who scold you for sinning. Last year, Turchin and a dozen co-authors mined the database (“records from 414 societies that span the past 10,000 years from 30 regions around the world, using 51 measures of social complexity and 4 measures of supernatural enforcement of morality”) to answer the question conclusively. They found that complex societies are more likely to have moralizing gods, but the gods tend to start their scolding after the societies get complex, not before

One of Turchin’s most unwelcome conclusions is that complex societies arise through war. The effect of war is to reward communities that organize themselves to fight and survive, and it tends to wipe out ones that are simple and small-scale

the data are clear: Darwinian processes select for complex socie­ties because they kill off simpler ones.

Certain aspects of this cyclical view require relearning portions of American history, with special attention paid to the numbers of elites. The industrialization of the North, starting in the mid-19th century, Turchin says, made huge numbers of people rich. The elite herd was culled during the Civil War, which killed off or impoverished the southern slaveholding class, and during Reconstruction, when America experienced a wave of assassinations of Republican politicians.

“There is a very close correlation between adopting democratic institutions and having to fight a war for survival.”

Also unwelcome: the conclusion that civil unrest might soon be upon us, and might reach the point of shattering the country. In 2012, Turchin published an analysis of political violence in the United States, again starting with a database. He classified 1,590 incidents—riots, lynchings, any political event that killed at least one person—from 1780 to 2010. Some periods were placid and others bloody, with peaks of brutality in 1870, 1920, and 1970, a 50-year cycle.

In 2010, when Nature surveyed scientists about their predictions for the coming decade, most took the survey as an invitation to self-promote and rhapsodize, dreamily, about coming advances in their fields. Turchin retorted with his prophecy of doom and said that nothing short of fundamental change would stop another violent turn.

It wasn’t until the Progressive reforms of the 1920s, and later the New Deal, that elite overproduction actually slowed, at least for a time.

This oscillation between violence and peace, with elite over­production as the first horseman of the recurring American apocalypse, inspired Turchin’s 2020 prediction

The notion that democracy finds its strength in its essential goodness and moral improvement over its rival systems is likewise fanciful. Instead, democratic societies flourish because they have a memory of being nearly obliterated by an external enemy. They avoided extinction only through collective action, and the memory of that collective action makes democratic politics easier to conduct in the present,

Some sound like ideas that might have come from Senator Elizabeth Warren—tax the elites until there are fewer of them

others, such as a call to reduce immigration to keep wages high for American workers, resemble Trumpian protectionism.

He opposes credential-­oriented higher education, for example, which he says is a way of mass-producing elites without also mass-­producing elite jobs for them to occupy. Architects of such policies, he told me, are “creating surplus elites, and some become counter-elites.” A smarter approach would be to keep the elite numbers small, and the real wages of the general population on a constant rise.

We need to stop the runaway process of elite overproduction, but I don’t know what will work to do that, and nobody else does. Do you increase taxation? Raise the minimum wage? Universal basic income?” He conceded that each of these possibilities would have unpredictable effects

practice “adaptive management,” changing and modulating your approach as you go.

Eventually, Turchin hopes, our understanding of historical dynamics will mature to the point that no government will make policy without reflecting on whether it is hurtling toward a mathematically pre­ordained disaster.

He says he could imagine an Asimovian agency that keeps tabs on leading indicators and advises accordingly. It would be like the Federal Reserve, but instead of monitoring inflation and controlling monetary supply, it would be tasked with averting total civilizational collapse.

Since at least the 19th century, the discipline has embraced the idea that history is irreducibly complex, and by now most historians believe that the diversity of human activity will foil any attempt to come up with general laws, especially predictive ones.

The idea that one thing causes another, and that the causal pattern can tell you about sequences of events in another place or century, is foreign territory.

Turchin counters that he has heard claims of irreducible complexity before, and that steady application of the scientific method has succeeded in managing that complexity.

One social scientist who can speak to Turchin in his own mathematical argot is Dingxin Zhao, a sociology professor at the University of Chicago who is—incredibly—­also a former mathematical ecologist.

in a way I am sympathetic to Turchin. If you come to social science from natural sciences, you have a powerful way of looking at the world. But you may also make big mistakes.”

Turchin is nonetheless filling a historiographical niche left empty by academic historians with allergies not just to science but to a wide-angle view of the past.

humans are much wilier social creatures, Zhao said. A woodpecker will eat a termite, but it “will not explain that he is doing so because it is his divine right.” Humans pull ideological power moves like this all the time, Zhao said, and to understand “the decisions of a Donald Trump, or a Xi Jinping,” a natural scientist has to incorporate the myriad complexities of human strategy, emotion, and belief. “I made that change,” Zhao told me, “and Peter Turchin has not.”

Zhao said that human beings are just much more complicated than bugs.

He places himself in a Russian tradition prone to thinking sweeping, Tolstoyan thoughts about the path of history. By comparison, American historians mostly look like micro-historians.

Rather than bending toward progress, the arc in his view bends all the way back on itself, in a never-­ending loop of boom and bust. This puts him at odds with American historians, many of whom harbor an unspoken faith that liberal democracy is the end state of all history.

Writing history in this sweeping, cyclical way is easier if you are trained outside the field. “If you look at who is doing these megahistories, more often than not, it’s not actual historians,”

The genre’s most famous book, Guns, Germs, and Steel (1997), beheld 13,000 years of human history in a single volume. Its author, Jared Diamond, spent the first half of his career as one of the world’s foremost experts on the physiology of the gall­bladder.

Steven Pinker, a cognitive psychologist who studies how children acquire parts of speech, has written a megahistory about the decline of violence across thousands of years, and about human flourishing since the Enlightenment

Most historians I asked about these men—and for some reason megahistory is nearly always a male pursuit—used terms like laughingstock and patently tendentious to describe them.

Pinker retorts that historians are resentful of the attention “disciplinary carpet­baggers” like himself have received for applying scientific methods to the humanities and coming up with conclusions that had eluded the old methods.

“Given the noisiness of human behavior and the prevalence of cognitive biases, it’s easy to delude oneself about a historical period or trend by picking whichever event suits one’s narrative,” he says. The only answer is to use large data sets.

“There’s no reason that traditional history and data science can’t merge into a cooperative enterprise,” Pinker wrote. “Knowing stuff is hard; we need to use every available tool.”

Turchin’s conclusions are only as good as his databases, she told me, and any database that tries to code something as complex as who constitutes a society’s elites—then tries to make like-to-like comparisons across millennia and oceans—will meet with skepticism from traditional historians

Turchin’s data are also limited to big-­picture characteristics observed over 10,000 years, or about 200 lifetimes. By scientific standards, a sample size of 200 is small, even if it is all humanity has.

Privately, some historians have told me they consider the tools he uses powerful, if a little crude. Clio­dynamics is now on a long list of methods that arrived on the scene promising to revolutionize history. Many were fads, but some survived that stage to take their rightful place in an expanding historiographical tool kit

Turchin’s methods have already shown their power. Cliodynamics offers scientific hypotheses, and human history will give us more and more opportunities to check its predictions—­revealing whether Peter Turchin is a Hari Seldon or a mere Nostradamus.

The president’s allies are newly optimistic the brightening economic mood will further discredit the notion that a recession is necessary to tame inflation.

Despite the disagreement, senior White House aides still talk to Summers frequently and routinely seek his input. Summers has been to the White House several times this year alone, even as he continues to publicly hammer Biden’s industrial policy, student loan forgiveness and other economic programs.

Along with other centrist economists, Summers says inflation remains dangerously high, warning it could reaccelerate. The latest inflation report shows prices rising by 3.2 percent in July relative to one year ago, but a less volatile measure of price increases is still at 4.7 percent. The labor market remains strong not because Biden has defied the laws of economic reality, according to Summers, but because the battle against inflation is still far from won. Summers maintains the rescue plan sparked inflation that is at risk of becoming “entrenched” — a long-term problem for consumers and businesses.

“I don’t think anybody should reach any definitive judgments until we see how things play out,” Summers said in an interview. Summers said his predictions were based on standard macroeconomic models, and not meant to be interpreted as precise estimates. “The idea that bringing down inflation has nothing to do with increasing unemployment runs different from all conventional macroeconomic assessments.”

“The Democratic Party is currently split between people who thought the American Rescue Plan was appropriately sized and absolutely necessary — and those who think it was too big and had collateral effects that were quite damaging,” said Bill Galston, a policy analyst at the D.C.-based Brookings Institution who served in the Clinton administration. “This is a moral question, but it’s also a political question. If Joe Biden loses the election principally because of economic discontent over inflation and high prices, then a lot of Democrats will conclude it was not worth it.”

Summers has also made predictions that still do not appear to have been borne out, at least not yet. In a June 2022 speech at the London School of Economics, when inflation was at its 9.1 percent peak, Summers said the nation would “need” substantially higher levels of unemployment for inflation to come down.

“We need five years of unemployment above 5 percent to contain inflation — in other words, we need two years of 7.5 percent unemployment or five years of 6 percent unemployment or one year of 10 percent unemployment,

That same month, Summers and a co-author wrote that reducing job vacancies by 20 percent “requires, on average” a three percentage point increase in the unemployment rate. The number of job openings has fallen about 16 percent with no discernible jump in unemployment

In September 2022, Summers reiterated the point to Fortune: “I’m not sure you’re restraining inflation until you get the unemployment rate close to 5 percent, and to significantly restrain inflation you’re likely to need unemployment for some period at 6 percent.” The unemployment rate was 3.5 percent then and is the same level now.

In more recent interviews, Summers has defended his estimates by pointing out that inflation remains above the Fed’s 2 percent target. In particular, Summers emphasizes that it was always the case that transitory factors — such as soaring gas prices — pushed inflation up higher, to closer to 8 percent, but that the more stable “underlying” inflation was closer to 4.5 percent.

Even with lower overall inflation, Summers argues, underlying inflation remains largely unchanged — though the decline in transitory prices makes the problem appear to be going away.

“I think it’s fair to say — given how hot the economy is — the inflation performance at this point is better than I think many standard models would have predicted,” Summers said. “But I don’t think that all establishes we’re on a confident glide path to 2 percent with current rates of unemployment.”

More liberal economists argued that Summers misdiagnosed the cause of higher inflation, and therefore missed the cure. These economists contend that price spikes were overwhelmingly caused by supply chain disruptions, including lingering shocks from the pandemic and Russia’s invasion of Ukraine, not by too much government stimulus. As supply chains have normalized, so too has inflation.

Skanda Amarnath, executive director of the left-leaning think tank Employ America, emphasized that inflation is “now broadly decelerating,” not just in some idiosyncratic or transitory factors such as energy and used cars but across a large range of categories — household furnishings, technological equipment, wages, legal and professional services, and more.

“Remember when the experts said that to get inflation under control we needed to lower wages, and drive up unemployment? I never bought that,” Biden tweeted on July 20. “Instead, I focused on getting more Americans into the workforce, fixing our broken supply chains, and lowering costs.

Summers remains unconvinced about the rescue plan, pointing to substantial “unhappiness in the middle class about the state of the economy” over the last two years, mostly driven by inflation.

Based on the current trajectory, war between the United States and China in the decades ahead is not just possible, but much more likely than recognized at the moment. Indeed, judging by the historical record, war is more likely than not.

A risk associated with Thucydides’s Trap is that business as usual—not just an unexpected, extraordinary event—can trigger large-scale conflict. When a rising power is threatening to displace a ruling power, standard crises that would otherwise be contained, like the assassination of an archduke in 1914, can initiate a cascade of reactions that, in turn, produce outcomes none of the parties would otherwise have chosen.

The preeminent geostrategic challenge of this era is not violent Islamic extremists or a resurgent Russia. It is the impact that China’s ascendance will have on the U.S.-led international order, which has provided unprecedented great-power peace and prosperity for the past 70 years. As Singapore’s late leader, Lee Kuan Yew, observed, “the size of China’s displacement of the world balance is such that the world must find a new balance. It is not possible to pretend that this is just another big player. This is the biggest player in the history of the world.”

More than 2,400 years ago, the Athenian historian Thucydides offered a powerful insight: “It was the rise of Athens, and the fear that this inspired in Sparta, that made war inevitable.

Note that Thucydides identified two key drivers of this dynamic: the rising power’s growing entitlement, sense of its importance, and demand for greater say and sway, on the one hand, and the fear, insecurity, and determination to defend the status quo this engenders in the established power, on the other.

However unimaginable conflict seems, however catastrophic the potential consequences for all actors, however deep the cultural empathy among leaders, even blood relatives, and however economically interdependent states may be—none of these factors is sufficient to prevent war, in 1914 or today.

Four of the 16 cases in our review did not end in bloodshed. Those successes, as well as the failures, offer pertinent lessons for today’s world leaders. Escaping the Trap requires tremendous effort

In 1980, China had 10 percent of America’s GDP as measured by purchasing power parity; 7 percent of its GDP at current U.S.-dollar exchange rates; and 6 percent of its exports. The foreign currency held by China, meanwhile, was just one-sixth the size of America’s reserves. The answers for the second column: By 2014, those figures were 101 percent of GDP; 60 percent at U.S.-dollar exchange rates; and 106 percent of exports. China’s reserves today are 28 times larger than America’s.

Could China become #1? In what year could China overtake the United States to become, say, the largest economy in the world, or primary engine of global growth, or biggest market for luxury goods?

Could China Become #1? Manufacturer: Exporter: Trading nation: Saver: Holder of U.S. debt: Foreign-direct-investment destination: Energy consumer: Oil importer: Carbon emitter: Steel producer: Auto market: Smartphone market: E-commerce market: Luxury-goods market:   Internet user: Fastest supercomputer: Holder of foreign reserves: Source of initial public offerings: Primary engine of global growth: Economy: Most are stunned to learn that on each of these 20 indicators, China has already surpassed the U.S.

Lee Kuan Yew, the world’s premier China watcher and a mentor to Chinese leaders since Deng Xiaoping. Before his death in March, the founder of Singapore put the odds of China continuing to grow at several times U.S. rates for the next decade and beyond as “four chances in five.

On whether China’s leaders are serious about displacing the United States as the top power in Asia in the foreseeable future, Lee answered directly: “Of course. Why not … how could they not aspire to be number one in Asia and in time the world?” And about accepting its place in an international order designed and led by America, he said absolutely not: “China wants to be China and accepted as such—not as an honorary member of the West.”

As the United States emerged as the dominant power in the Western hemisphere in the 1890s, how did it behave? Future President Theodore Roosevelt personified a nation supremely confident that the 100 years ahead would be an American century. Over a decade that began in 1895 with the U.S. secretary of state declaring the United States “sovereign on this continent,” America liberated Cuba; threatened Britain and Germany with war to force them to accept American positions on disputes in Venezuela and Canada; backed an insurrection that split Colombia to create a new state of Panama (which immediately gave the U.S. concessions to build the Panama Canal); and attempted to overthrow the government of Mexico, which was supported by the United Kingdom and financed by London bankers. In the half century that followed, U.S. military forces intervened in “our hemisphere” on more than 30 separate occasions to settle economic or territorial disputes in terms favorable to Americans, or oust leaders they judged unacceptable

When Deng Xiaoping initiated China’s fast march to the market in 1978, he announced a policy known as “hide and bide.” What China needed most abroad was stability and access to markets. The Chinese would thus “bide our time and hide our capabilities,” which Chinese military officers sometimes paraphrased as getting strong before getting even.

With the arrival of China’s new paramount leader, Xi Jinping, the era of “hide and bide” is over

Many observers outside China have missed the great divergence between China’s economic performance and that of its competitors over the seven years since the financial crisis of 2008 and Great Recession. That shock caused virtually all other major economies to falter and decline. China never missed a year of growth, sustaining an average growth rate exceeding 8 percent. Indeed, since the financial crisis, nearly 40 percent of all growth in the global economy has occurred in just one country: China

What Xi Jinping calls the “China Dream” expresses the deepest aspirations of hundreds of millions of Chinese, who wish to be not only rich but also powerful. At the core of China’s civilizational creed is the belief—or conceit—that China is the center of the universe. In the oft-repeated narrative, a century of Chinese weakness led to exploitation and national humiliation by Western colonialists and Japan. In Beijing’s view, China is now being restored to its rightful place, where its power commands recognition of and respect for China’s core interests.

Last November, in a seminal meeting of the entire Chinese political and foreign-policy establishment, including the leadership of the People’s Liberation Army, Xi provided a comprehensive overview of his vision of China’s role in the world. The display of self-confidence bordered on hubris. Xi began by offering an essentially Hegelian conception of the major historical trends toward multipolarity (i.e. not U.S. unipolarity) and the transformation of the international system (i.e. not the current U.S.-led system). In his words, a rejuvenated Chinese nation will build a “new type of international relations” through a “protracted” struggle over the nature of the international order. In the end, he assured his audience that “the growing trend toward a multipolar world will not change.”

Given objective trends, realists see an irresistible force approaching an immovable object. They ask which is less likely: China demanding a lesser role in the East and South China Seas than the United States did in the Caribbean or Atlantic in the early 20th century, or the U.S. sharing with China the predominance in the Western Pacific that America has enjoyed since World War II?

At this point, the established script for discussion of policy challenges calls for a pivot to a new strategy (or at least slogan), with a short to-do list that promises peaceful and prosperous relations with China. Shoehorning this challenge into that template would demonstrate only one thing: a failure to understand the central point I’m trying to make

What strategists need most at the moment is not a new strategy, but a long pause for reflection. If the tectonic shift caused by China’s rise poses a challenge of genuinely Thucydidean proportions, declarations about “rebalancing,” or revitalizing “engage and hedge,” or presidential hopefuls’ calls for more “muscular” or “robust” variants of the same, amount to little more than aspirin treating cancer. Future historians will compare such assertions to the reveries of British, German, and Russian leaders as they sleepwalked into 1914

The rise of a 5,000-year-old civilization with 1.3 billion people is not a problem to be fixed. It is a condition—a chronic condition that will have to be managed over a generation

Success will require not just a new slogan, more frequent summits of presidents, and additional meetings of departmental working groups. Managing this relationship without war will demand sustained attention, week by week, at the highest level in both countries. It will entail a depth of mutual understanding not seen since the Henry Kissinger-Zhou Enlai conversations in the 1970s. Most significantly, it will mean more radical changes in attitudes and actions, by leaders and publics alike, than anyone has yet imagined.

Dr. Shi’s group was fascinated by how coronaviruses jump from species to species. To find viruses, they took samples from bats and other animals, as well as from sick people living near animals carrying these viruses or associated with the wildlife trade. Much of this work was conducted in partnership with the EcoHealth Alliance, a U.S.-based scientific organization that, since 2002, has been awarded over $80 million in federal funding to research the risks of emerging infectious diseases.

Their research showed that the viruses most similar to SARS‑CoV‑2, the virus that caused the pandemic, circulate in bats that live roughly 1,000 miles away from Wuhan. Scientists from Dr. Shi’s team traveled repeatedly to Yunnan province to collect these viruses and had expanded their search to Southeast Asia. Bats in other parts of China have not been found to carry viruses that are as closely related to SARS-CoV-2.

When the Covid-19 outbreak was detected, Dr. Shi initially wondered if the novel coronavirus had come from her laboratory, saying she had never expected such an outbreak to occur in Wuhan.

The SARS‑CoV‑2 virus is exceptionally contagious and can jump from species to species like wildfire. Yet it left no known trace of infection at its source or anywhere along what would have been a thousand-mile journey before emerging in Wuhan.

The year before the outbreak, the Wuhan institute, working with U.S. partners, had proposed creating viruses with SARS‑CoV‑2’s defining feature

The laboratory pursued risky research that resulted in viruses becoming more infectious: Coronaviruses were grown from samples from infected animals and genetically reconstructed and recombined to create new viruses unknown in nature. These new viruses were passed through cells from bats, pigs, primates and humans and were used to infect civets and humanized mice (mice modified with human genes). In essence, this process forced these viruses to adapt to new host species, and the viruses with mutations that allowed them to thrive emerged as victors.

Worse still, as the pandemic raged, their American collaborators failed to publicly reveal the existence of the Defuse proposal. The president of EcoHealth, Peter Daszak, recently admitted to Congress that he doesn’t know about virus samples collected by the Wuhan institute after 2015 and never asked the lab’s scientists if they had started the work described in Defuse.

By 2019, Dr. Shi’s group had published a database describing more than 22,000 collected wildlife samples. But external access was shut off in the fall of 2019, and the database was not shared with American collaborators even after the pandemic started, when such a rich virus collection would have been most useful in tracking the origin of SARS‑CoV‑2. It remains unclear whether the Wuhan institute possessed a precursor of the pandemic virus.

In 2021, The Intercept published a leaked 2018 grant proposal for a research project named Defuse, which had been written as a collaboration between EcoHealth, the Wuhan institute and Ralph Baric at the University of North Carolina, who had been on the cutting edge of coronavirus research for years. The proposal described plans to create viruses strikingly similar to SARS‑CoV‑2.

Coronaviruses bear their name because their surface is studded with protein spikes, like a spiky crown, which they use to enter animal cells. The Defuse project proposed to search for and create SARS-like viruses carrying spikes with a unique feature: a furin cleavage site — the same feature that enhances SARS‑CoV‑2’s infectiousness in humans, making it capable of causing a pandemic. Defuse was never funded by the United States.

owever, in his testimony on Monday, Dr. Fauci explained that the Wuhan institute would not need to rely on U.S. funding to pursue research independently.

While it’s possible that the furin cleavage site could have evolved naturally (as seen in some distantly related coronaviruses), out of the hundreds of SARS-like viruses cataloged by scientists, SARS‑CoV‑2 is the only one known to possess a furin cleavage site in its spike. And the genetic data suggest that the virus had only recently gained the furin cleavage site before it started the pandemic.

Ultimately, a never-before-seen SARS-like virus with a newly introduced furin cleavage site, matching the description in the Wuhan institute’s Defuse proposal, caused an outbreak in Wuhan less than two years after the proposal was drafted.

When the Wuhan scientists published their seminal paper about Covid-19 as the pandemic roared to life in 2020, they did not mention the virus’s furin cleavage site — a feature they should have been on the lookout for, according to their own grant proposal, and a feature quickly recognized by other scientists.

At the Wuhan Institute of Virology, a team of scientists had been hunting for SARS-like viruses for over a decade, led by Shi Zhengl

In May, citing failures in EcoHealth’s monitoring of risky experiments conducted at the Wuhan lab, the Biden administration suspended all federal funding for the organization and Dr. Daszak, and initiated proceedings to bar them from receiving future grants. In his testimony on Monday, Dr. Fauci said that he supported the decision to suspend and bar EcoHealth.

Separately, Dr. Baric described the competitive dynamic between his research group and the institute when he told Congress that the Wuhan scientists would probably not have shared their most interesting newly discovered viruses with him. Documents and email correspondence between the institute and Dr. Baric are still being withheld from the public while their release is fiercely contested in litigation.

In the end, American partners very likely knew of only a fraction of the research done in Wuhan. According to U.S. intelligence sources, some of the institute’s virus research was classified or conducted with or on behalf of the Chinese military.

In the congressional hearing on Monday, Dr. Fauci repeatedly acknowledged the lack of visibility into experiments conducted at the Wuhan institute, saying, “None of us can know everything that’s going on in China, or in Wuhan, or what have you. And that’s the reason why — I say today, and I’ve said at the T.I.,” referring to his transcribed interview with the subcommittee, “I keep an open mind as to what the origin is.”

The Wuhan lab pursued this type of work under low biosafety conditions that could not have contained an airborne virus as infectious as SARS‑CoV‑2.

Labs working with live viruses generally operate at one of four biosafety levels (known in ascending order of stringency as BSL-1, 2, 3 and 4) that describe the work practices that are considered sufficiently safe depending on the characteristics of each pathogen. The Wuhan institute’s scientists worked with SARS-like viruses under inappropriately low biosafety conditions.

​​Biosafety levels are not internationally standardized, and some countries use more permissive protocols than others.

In one experiment, Dr. Shi’s group genetically engineered an unexpectedly deadly SARS-like virus (not closely related to SARS‑CoV‑2) that exhibited a 10,000-fold increase in the quantity of virus in the lungs and brains of humanized mice. Wuhan institute scientists handled these live viruses at low biosafety levels, including BSL-2.

Even the much more stringent containment at BSL-3 cannot fully prevent SARS‑CoV‑2 from escaping. Two years into the pandemic, the virus infected a scientist in a BSL-3 laboratory in Taiwan, which was, at the time, a zero-Covid country. The scientist had been vaccinated and was tested only after losing the sense of smell. By then, more than 100 close contacts had been exposed. Human error is a source of exposure even at the highest biosafety levels, and the risks are much greater for scientists working with infectious pathogens at low biosafety.

An early draft of the Defuse proposal stated that the Wuhan lab would do their virus work at BSL-2 to make it “highly cost-effective.” Dr. Baric added a note to the draft highlighting the importance of using BSL-3 to contain SARS-like viruses that could infect human cells, writing that “U.S. researchers will likely freak out.”

Years later, after SARS‑CoV‑2 had killed millions, Dr. Baric wrote to Dr. Daszak: “I have no doubt that they followed state determined rules and did the work under BSL-2. Yes China has the right to set their own policy. You believe this was appropriate containment if you want but don’t expect me to believe it. Moreover, don’t insult my intelligence by trying to feed me this load of BS.”

SARS‑CoV‑2 is a stealthy virus that transmits effectively through the air, causes a range of symptoms similar to those of other common respiratory diseases and can be spread by infected people before symptoms even appear. If the virus had escaped from a BSL-2 laboratory in 2019, the leak most likely would have gone undetected until too late.

One alarming detail — leaked to The Wall Street Journal and confirmed by current and former U.S. government officials — is that scientists on Dr. Shi’s team fell ill with Covid-like symptoms in the fall of 2019. One of the scientists had been named in the Defuse proposal as the person in charge of virus discovery work. The scientists denied having been sick.

The hypothesis that Covid-19 came from an animal at the Huanan Seafood Market in Wuhan is not supported by strong evidence.

In December 2019, Chinese investigators assumed the outbreak had started at a centrally located market frequented by thousands of visitors daily. This bias in their search for early cases meant that cases unlinked to or located far away from the market would very likely have been missed

To make things worse, the Chinese authorities blocked the reporting of early cases not linked to the market and, claiming biosafety precautions, ordered the destruction of patient samples on January 3, 2020, making it nearly impossible to see the complete picture of the earliest Covid-19 cases. Information about dozens of early cases from November and December 2019 remains inaccessible.

A pair of papers published in Science in 2022 made the best case for SARS‑CoV‑2 having emerged naturally from human-animal contact at the Wuhan market by focusing on a map of the early cases and asserting that the virus had jumped from animals into humans twice at the market in 2019

More recently, the two papers have been countered by other virologists and scientists who convincingly demonstrate that the available market evidence does not distinguish between a human superspreader event and a natural spillover at the market.

Furthermore, the existing genetic and early case data show that all known Covid-19 cases probably stem from a single introduction of SARS‑CoV‑2 into people, and the outbreak at the Wuhan market probably happened after the virus had already been circulating in humans.

Not a single infected animal has ever been confirmed at the market or in its supply chain. Without good evidence that the pandemic started at the Huanan Seafood Market, the fact that the virus emerged in Wuhan points squarely at its unique SARS-like virus laboratory.

With today’s technology, scientists can detect how respiratory viruses — including SARS, MERS and the flu — circulate in animals while making repeated attempts to jump across species. Thankfully, these variants usually fail to transmit well after crossing over to a new species and tend to die off after a small number of infections

investigators have not reported finding any animals infected with SARS‑CoV‑2 that had not been infected by humans. Yet, infected animal sources and other connective pieces of evidence were found for the earlier SARS and MERS outbreaks as quickly as within a few days, despite the less advanced viral forensic technologies of two decades ago.

Even though Wuhan is the home base of virus hunters with world-leading expertise in tracking novel SARS-like viruses, investigators have either failed to collect or report key evidence that would be expected if Covid-19 emerged from the wildlife trade. For example, investigators have not determined that the earliest known cases had exposure to intermediate host animals before falling ill.

No antibody evidence shows that animal traders in Wuhan are regularly exposed to SARS-like viruses, as would be expected in such situations.

In previous outbreaks of coronaviruses, scientists were able to demonstrate natural origin by collecting multiple pieces of evidence linking infected humans to infected animals

In contrast, virologists and other scientists agree that SARS‑CoV‑2 required little to no adaptation to spread rapidly in humans and other animals. The virus appears to have succeeded in causing a pandemic upon its only detected jump into humans.

it was a SARS-like coronavirus with a unique furin cleavage site that emerged in Wuhan, less than two years after scientists, sometimes working under inadequate biosafety conditions, proposed collecting and creating viruses of that same design.

a laboratory accident is the most parsimonious explanation of how the pandemic began.

Given what we now know, investigators should follow their strongest leads and subpoena all exchanges between the Wuhan scientists and their international partners, including unpublished research proposals, manuscripts, data and commercial orders. In particular, exchanges from 2018 and 2019 — the critical two years before the emergence of Covid-19 — are very likely to be illuminating (and require no cooperation from the Chinese government to acquire), yet they remain beyond the public’s view more than four years after the pandemic began.

it is undeniable that U.S. federal funding helped to build an unprecedented collection of SARS-like viruses at the Wuhan institute, as well as contributing to research that enhanced them.

Advocates and funders of the institute’s research, including Dr. Fauci, should cooperate with the investigation to help identify and close the loopholes that allowed such dangerous work to occur. The world must not continue to bear the intolerable risks of research with the potential to cause pandemics.

A successful investigation of the pandemic’s root cause would have the power to break a decades-long scientific impasse on pathogen research safety, determining how governments will spend billions of dollars to prevent future pandemics. A credible investigation would also deter future acts of negligence and deceit by demonstrating that it is indeed possible to be held accountable for causing a viral pandemic

Last but not least, people of all nations need to see their leaders — and especially, their scientists — heading the charge to find out what caused this world-shaking event. Restoring public trust in science and government leadership requires it.

According to the World Health Organization, “lead affects children’s brain development resulting in reduced intelligence quotient (IQ), behavioral changes such as shortening of attention span and increased antisocial behavior, and reduced educational attainment. Lead exposure also causes anemia, hypertension, renal impairment, immunotoxicity and toxicity to the reproductive organs. The neurological and behavioral effects of lead are believed to be irreversible.”

The Hurley Medical Center, in Flint, released a study in September that confirmed what many Flint parents had feared for over a year: The proportion of infants and children with above-average levels of lead in their blood has nearly doubled since the city switched from the Detroit water system to using the Flint River as its water source, in 2014.

The crisis reached a nadir Monday night, when Flint Mayor Karen Weaver declared a state of emergency. “The City of Flint has experienced a Manmade disaster,” Weaver said in a declaratory statement. 1 of 11 Full Screen Autoplay Close Skip Ad × fa fa

The mayor — elected after her predecessor, Dayne Walling, experienced fallout from his administration’s handling of the water problems — said in the statement that she was seeking support from the federal government to deal with the “irreversible” effects of lead exposure on the city’s children. Weaver thinks that these health consequences will lead to a greater need for special education and mental health services, as well as developments in the juvenile justice system.

To those living in Flint, the announcement may feel as if it has been a long time coming. Almost immediately after the city started drawing from the Flint River in April 2014, residents began complaining about the water, which they said was cloudy in appearance and emitted a foul odor.

Since then, complications from the water coming from the Flint River have only piled up. Although city and state officials initially denied that the water was unsafe, the state issued a notice informing Flint residents that their water contained unlawful levels of trihalomethanes, a chlorine byproduct linked to cancer and other diseases.

Protesters marched to City Hall in the fierce Michigan cold, calling for officials to reconnect Flint’s water to the Detroit system. The use of the Flint River was supposed to be temporary, set to end in 2016 after a pipeline to Lake Huron’s Karegnondi Water Authority is finished.

Through continued demonstrations by Flint residents and mounting scientific evidence of the water’s toxins, city and state officials offered various solutions — from asking residents to boil their water to providing them with water filters — in an attempt to work around the need to reconnect to the Detroit system.

That call was finally made by Snyder (R) on Oct. 8. He announced that he had a plan for coming up with the $12 million to switch Flint back to the Detroit system. On Oct. 16, water started flowing again from Detroit to Flint.

Many Chinese tech companies are “at this critical size that the China market alone is not enough to support their business and valuation,

The surge also positions Asia’s investors to win stakes in markets that Western companies covet, or that have national security implications.

. “If you think that being the locus of invention gives you a boost to your GDP and so forth, that’s a deterioration of the U.S. competitive advantage.”

Although one of the biggest Asian investors is Japan’s SoftBank Group Corp. , which has tapped Middle Eastern money to create the world’s largest tech-investment fund, it is Chinese activity that is having the greatest impact.

China is creating unicorns—startups valued at a billion dollars or more—at much the same pace as the U.S., drawing on funding from internet giants like Alibaba Group Holding Ltd. and Tencent Holdings Ltd. as well as more than a thousand domestic venture-capital firms that have raised billions of dollars a year for the past few year

Chinese-led venture funding is about 15 times its size in 2013, outpacing growth in U.S.-led financing, which roughly doubled in that time period

Most Chinese-led investment so far has gone to the country’s own firms, the Journal analysis found. Many of them, like the Yelp equivalent Meituan-Dianping, are household names with millions of customers in China, yet virtually unknown elsewhere.

The rise of China’s venture market “signifies a shift from a single-epicenter view of the world to a duopoly,” he says.

Madhur Deora, chief financial officer for Paytm, one of India’s biggest e-payments firms, says the company approached Alibaba affiliate Ant Financial instead of U.S. backers for funding in 2015 because Chinese mobile-internet innovations are “way far ahead of anything that’s happened in the U.S.

One reason China’s push into new technologies worries many in the U.S. is that, unlike the hunt for good returns that underpins most Western venture finance, a lot of Chinese investment is driven by strategic interests, some carrying the specter of state influence.

China is pushing hard into semiconductors, for which the government has provided billions of dollars in public funding, and artificial intelligence, where Beijing in July set a goal of global leadership by 2030

Mr. Lee, the venture investor, predicts that in the next five to 10 years Chinese tech companies will become pacesetters for tech-related development, vying with the likes of Alphabet Inc.’s Google and Facebook for dominance in markets outside the English-speaking world and Western Europe.

“All the rest of the world will basically be a land grab between the U.S. and China,

“The U.S. approach is: We’ll build a better product and just win over all the countries,” says Mr. Lee. The Chinese approach is “we’ll fund the local partner to beat off the American companies.”

Asia’s rise as a startup financier is even starker in the biggest venture investments—those of $100 million or more. These megadeals have become an increasingly important part of venture finance as valuations have ballooned, with their proportion of deal volume growing from around 8% in 2007 to around half of the total last year.

In Southeast Asia, a flood of Chinese money into local startups—such as the $1.1 billion Alibaba-led investment into Indonesian online marketplace PT Tokopedia last year—is drawing the region closer to China

Chinese money is also playing a big role in India, which, with a population of 1.2 billion, has been described as the next big internet market. Chinese and Japanese investors each led nearly $3 billion in venture finance in India last year, ahead of the nearly $2 billion in deals led by U.S. investors

“Think of strategic investments and M&A as playing a game of go,” said Mr. Tsai, the Alibaba executive vice chairman, at the investor conference last year. “In a game of go the strategic objective is to put your pieces on the chessboard and surround your opponent.”

She has served four years and nine months of her sentence so far. Concerns about her health were raised after she was taken to a hospital in Seoul, the capital, for various illnesses last month.

Mr. Moon said that Ms. Park’s declining heath had also been a factor in his government’s decision to release her.

Ms. Park was pardoned under a broad amnesty that benefited 700 other prisoners, whose remaining prison terms will be eradicated or cut in half. The South Korean president has the power to grant amnesty to prisoners under the Constitution, and has often exercised it to mark major national holidays or the beginning of a new year.

Ms. Park, a daughter of the former military dictator Park Chung-hee, was in her fourth year in power in 2016 when hundreds of thousands of protesters began months of weekly rallies in central Seoul demanding that she be forced from office for corruption and incompetence.

In January this year, the Supreme Court approved a reduced 20-year prison term for Ms. Park and ordered her to pay 18 billion won ($15 million) in fines, saying that she and her longtime friend and confidante Choi Soon-sil had collected or demanded $19.3 million in bribes from three big businesses, including $7 million from Samsung, South Korea’s largest and most lucrative business group.

The younger Mr. Lee, who was sentenced to two and a half years in prison in the corruption scandal, was released on parole in August, when South Korea freed hundreds of prisoners to mark the Aug. 15 National Liberation Day, which commemorates the end of Japanese colonial rule of South Korea at the end of World War II.

Despite her conviction, Ms. Park still had a sizable following of die-hard supporters, mostly older conservative South Koreans, who have held rallies in downtown Seoul calling her innocent and demanding her release.

Those who have argued for her pardon have compared her case to those of the former military dictators Chun Doo-hwan and Roh Tae-woo.

Mr. Moon’s government granted a special amnesty to former Prime Minister Han Myeong-sook, one of the president’s former political allies. Ms. Han was sentenced to two years in prison in 2015 on charges of collecting illegal political donations. She finished her term in 2017.

The government also released Lee Seok-ki, a progressive politician, on parole on Friday. He was arrested by Ms. Park’s government in 2013 on charges of conspiring to start an armed revolt to overthrow the Seoul government in the event of war with North Korea. He has served all but nine months of his nine-year sentence.

calling him a victim of what they saw as a political witch hunt by Ms. Park to repress her political enemies.

Doctors in the top 10 percent averaged $1.3 million

And those in the top 1 percent averaged an astounding $4 million, though most of that (85 percent) came from business income or capital gains.

In certain specialties, doctors see substantially more in their peak earning years: Neurosurgeons (about $920,000), orthopedic surgeons ($789,000) and radiation oncologists ($709,000) all did especially well for themselves. Specialty incomes cover 2005 to 2017 and are expressed in 2017 dollars.

family-practice physicians made around $230,000 a year. General practice ($225,000) and preventive-medicine ($224,000) doctors earned even less — though that’s still enough to put them at the top of the heap among all U.S. earners.

“There is this sense of, well, if you show that physician incomes put them at the top of the income distribution, then you’re somehow implying that they’re instead going into medicine because they want to make money. And that narrative is uncomfortable to people.”

why did those figures ruffle so many physician feathers?

“You can want to help people and you can simultaneously want to earn money and have a nicer lifestyle and demand compensation for long hours and long training. That’s totally normal behavior in the labor market.”

Yale University economist Jason Abaluck notes that when he asks the doctors and future doctors in his health economics classes why they earn so much, answers revolve around the brutal training required to enter the profession. “Until they finish their residency, they’re working an enormous number of hours and their lifestyle is not the lifestyle of a rich person,” Abaluck told us.

why do physicians make that much?

On average, doctors — much like anyone else — behave in ways that just happen to drive up their income. For example, the economists found that graduates from the top medical schools, who can presumably write their own ticket to any field they want, tend to choose those that pay the most.

“Our analysis shows that certainly physicians respond to earnings when choosing specialties,” Polyakova told us. “And there’s nothing wrong with that, in my opinion.

“In general, U.S. physicians are making about 50 percent more than German physicians and about more than twice as much as U.K. physicians,

Grover said the widest gaps were “really driven by surgeons and a handful of procedural specialties,” doctors who perform procedures with clear outcomes, rather than preventing disease or treating chronic condition

“we’re not about prevention, you know?” he said, noting that his own PhD is in public health. “I wish it was different, but it ain’t!”

The United States has fewer doctors per person than 27 out of 31 member countries tracked by the Organization for Economic Cooperation and Development

In 1970, based on a slightly different measure that’s been tracked for longer, America had more licensed physicians per person than all but two of the 10 countries for which we have data. What caused the collapse?

the United States has far fewer residency slots than qualified med school graduates, which means thousands of qualified future physicians are annually shut out of the residency pipeline, denied their chosen career and stuck with no way to pay back those quarter-million-dollar loans.

“I’d like to see an in-depth analysis of the effect of the government capping the number of residency spots and how it’s created an artificial ‘physician shortage’ even though we have thousands of talented and graduated doctors that can’t practice due to not enough residency spots,”

Such an analysis would begin with a deeply influential 1980 report,

That report, by a federal advisory committee tasked with ensuring the nation had neither too few nor too many doctors, concluded that America was barreling toward a massive physician surplus. It came out just before President Ronald Reagan took office, and the new administration seemed only too eager to cut back on federal spending on doctor-training systems.

ssociation of American Medical Colleges (AAMC), a coalition of MD-granting medical schools and affiliated teaching hospitals, slammed the brakes on a long expansion. From 1980 to around 2004, the number of medical grads flatlined, even as the American population rose 29 percent.

Federal support for residencies was also ratcheted down, making it expensive or impossible for hospitals to provide enough slots for all the medical school graduates hitting the market each year. That effort peaked with the 1997 Balanced Budget Act which, among other things, froze funding for residencies — partially under the flawed assumption that HMOs would forever reduce the need for medical care in America, Orr writes. That freeze has yet to fully unwind.

or decades, many policymakers believed more doctors caused higher medical spending. Orr says that’s partly true, but “the early studies failed to differentiate between increased availability of valuable medical services and unnecessary treatment and services.”

“In reality, the greater utilization in places with more doctors represented greater availability, both in terms of expanded access to primary care and an ever-growing array of new and more advanced medical services,” he writes. “The impact of physician supply on levels of excessive treatment appears to be either small or nonexistent.”

“People have a narrative that physician earnings is one of the main drivers of high health-care costs in the U.S.,” Polyakova told us. “It is kind of hard to support this narrative if ultimately physicians earn less than 10 percent of national health-care expenditures.”

Polyakova and her collaborators find doctor pay consumes only 8.6 percent of overall health spending. It grew a bit faster than inflation over the time period studied, but much slower than overall health-care costs.

Regardless, the dramatic limits on medical school enrollment and residencies enjoyed strong support from the AAMC and the AMA. We were surprised to hear both organizations now sound the alarm about a doctor shortage. MD-granting medical schools started expanding again in 2005.

it’s because states have responded to the shortage by empowering nurse practitioners and physician assistants to perform tasks that once were the sole province of physicians. Over the past 20 years, the number of registered nurses grew almost twice as quickly as the number of doctors, and the number of physician assistants grew almost three times as rapidly, our analysis showed.

While there still aren’t enough residency positions, we’re getting more thanks in part to recent federal spending bills that will fund 1,200 more slots over the next few years.

The goal of the Paris climate accord is to keep the increase in global temperatures well below 2 degrees Celsius compared with pre-industrial levels, and ideally try to limit warming to 1.5 degrees Celsius. Those thresholds refer to temperature on Earth over multiple years. Exceeding 1.5 degrees Celsius of warming in a single year wouldn't breach the Paris Agreement. But with every passing year of rising greenhouse gas emissions, it becomes more and more likely that humans will cause catastrophic warming. The report estimates there's a 90% chance that one of the next five years will be the warmest year on record.

Growth in annual average economic output per capita has slowed from the century-long average of 2 percent, to 1.3 percent over the past 25 years, to a mere 0.7 percent over the past decade.

The gains in income since the 2007-9 Great Recession have flowed overwhelmingly to those at the top, as has been widely noted. Real median family income was lower last year than in 1998.

There are numerous causes of the less-than-satisfying economic growth in America: the retirement of the baby boomers, the withdrawal of working-age men from the labor force, the relentless rise in the inequality of the income distribution and, as I have written about elsewhere, a slowdown in technological innovation.

Education deserves particular focus because its effects are so long-lasting. Every high school dropout becomes a worker who likely won’t earn much more than minimum wage, at best, for the rest of his or her life.

The premium that employers pay to a college graduate compared with that to a high school graduate has soared since 1970, because of higher demand for technical and communication skills at the top of the scale and a collapse in demand for unskilled and semiskilled workers at the bottom.

research has shown that high-discipline, “no-excuses” charter schools, like those run by the Knowledge Is Power Program and the Harlem Children’s Zone, have erased racial achievement gaps. This model suggests that a complete departure from the traditional public school model, rather than pouring in more money per se, is needed.

For most of the postwar period, the G.I. Bill, public and land-grant universities and junior colleges made a low-cost education more accessible in the United States than anywhere in the world. But after leading the world in college completion, America has dropped to 16th.

The cost of a university education has risen faster than the rate of inflation for decades. Between 2008 and 2012 state financing for higher education declined by 28 percent

Two-year community colleges enroll 42 percent of American undergraduates. The Center on International Education Benchmarking reports that only 13 percent of students in two-year colleges graduate in two years; that figure rises to a still-dismal 28 percent after four year

Compared with other nations where students learn several languages and have math homework in elementary school, the American system expects too little. Parental expectations also matter: homework should be emphasized more, and sports less.

family breakdown is now biracial.” Among lower-income whites, the proportion of children living with both parents has plummeted over the past half-century

the holders of G.E.D.’s performed no better economically than high school dropouts and that the rising share of young people who are in prison rather than in school plays a small but important role in the drop in graduation rates.

Lacking in the American system is a well-organized funnel between community colleges and potential blue-collar employers, as in the renowned apprenticeship system in Germany.

In Canada, each province manages and finances education at the elementary, secondary and college levels, thus avoiding the inequality inherent in America’s system of local property-tax financing for public schools. Tuition at the University of Toronto was a mere $5,695 for Canadian arts and science undergraduates last year, compared with $37,576 at Harvard. It should not be surprising that the Canadian college completion rate is about 15 percentage points above the American rate.

In January, a 52-year-old Asian American woman was shot in the head with a flare gun, also in Chinatown.

84-year-old Vicha Ratanapakdee was going for a morning walk in his San Francisco neighborhood. Surveillance cameras captured a man running at him full speed and smashing his frail body to the pavement.

The Oakland Anti Police-Terror Project has asked people "to wear yellow to show you're in support of Chinatown seniors and businesses."

The more than two dozen recent assaults and robberies in the Bay Area mirror a national rise in hate crimes against older Asian Americans during the pandemic. From last March through the end of 2020, Kulkarni's group has documented nearly 3,000 incidents of anti-Asian hate across 47 states and the District of Columbia.

Despite arrests in some of the high-profile attacks, the violence has prompted many Chinatown businesses to reduce hours during a normally bustling shopping period ahead of Friday's Lunar New Year holiday.

Separately, more than 200 people across the area have volunteered to serve as "community strollers" in Chinatown starting next week.

"These attacks taking place in the Bay Area are part of a larger trend of anti-Asian American/Pacific Islander hate brought on in many ways by COVID-19, as well as some of the xenophobic policies and racist rhetoric that were pushed forward by the prior administration,"

"Racist rhetoric from the pandemic has targeted us as being the reason for the coronavirus," Wu says, singling out phrases used by former President Trump to describe the outbreak's origins.

Civil rights advocate Kulkarni also shared criticism of politically charged speech. "Oftentimes, perpetrators have used the exact language of the prior president, words like 'human virus, kung flu, China virus, China plague,' "Kulkarni says. "And sometimes they have even weaponized the former president himself saying 'Trump is going to get you, go back to your country.'

Across the bay in Oakland, Calif., police say they've added foot and car patrols and set up a mobile command post in Chinatown, measures the community welcomes.

"It's not unique to Chinatown or to the Asian community the increase in crime we've seen across the city and across the county, but we have seen in the last several weeks and month a very specific increase in crimes committed against Asians," O'Malley told a press conference in Chinatown.

"I believe there are some individuals in our community that have targeted people of different races," he says noting that some offenders may see Asian Americans as less likely report crimes to law enforcement.

The pandemic, chief Armstrong tells NPR, had certainly made it easier for criminals, with time on their hands, to mask up and often slip away unidentified. "That's why it's so important that businesses and others that have video that they share with us. The mask wearing, although it's required and I think very important for health reasons, it also is definitely a deterrence in identifying those that are responsible," he says.

President Biden, meantime, recently signed a memorandum pledging to combat anti-Asian and Pacific Islander discrimination. It was part of a series of racial equity-focused executive orders.

"What the incidents in the Bay Area remind us of is that action is needed now," Kulkarni says, "not a few months from now, not a few years from now."