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The new projection, released on Monday, was carried out by the Earth4All collective of leading environmental science and economic institutions, including the Potsdam Institute for Climate Impact Research, Stockholm Resilience Centre and the BI Norwegian Business School. They were commissioned by the Club of Rome for a followup to its seminal Limits to Growth study more than 50 years ago.

“This gives us evidence to believe the population bomb won’t go off, but we still face significant challenges from an environmental perspective. We need a lot of effort to address the current development paradigm of overconsumption and overproduction, which are bigger problems than population.”

Previous studies have painted a grimmer picture. Last year, the UN estimated the world population would hit 9.7 billion by the middle of the century and continue to rise for several decades afterwards.

But the authors caution that falling birthrates alone will not solve the planet’s environmental problems, which are already serious at the 7.8 billion level and are primarily caused by the excess consumption of a wealthy minority.

The report is based on a new methodology which incorporates social and economic factors that have a proven impact on birthrate, such as raising education levels, particularly for women, and improving income.

In the business-as-usual case, it foresees existing policies being enough to limit global population growth to below 9 billion in 2046 and then decline to 7.3 billion in 2100.

too little too late: “Although the scenario does not result in an overt ecological or total climate collapse, the likelihood of regional societal collapses nevertheless rises throughout the decades to 2050, as a result of deepening social divisions both internal to and between societies. The risk is particularly acute in the most vulnerable, badly governed and ecologically vulnerable economies.”

In the second, more optimistic scenario – with governments across the world raising taxes on the wealthy to invest in education, social services and improved equality – it estimates human numbers could hit a high of 8.5 billion as early as 2040 and then fall by more than a third to about 6 billion in 2100. Under this pathway, they foresee considerable gains by mid-century for human society and the natural environment.

“By 2050, greenhouse gas emissions are about 90% lower than they were in 2020 and are still falling,” according to the report. “Remaining atmospheric emissions of greenhouse gases from industrial processes are increasingly removed through carbon capture and storage. As the century progresses, more carbon is captured than stored, keeping the global temperature below 2C above pre-industrial levels. Wildlife is gradually recovering and starting to thrive once again in many places.”

what it would mean for the government to start treating money as a public good for us all

Even healthy and influential private companies can be ordered to undergo painful restructuring or curtail certain business operations

When nearly every renminbi borrowed is domestic — lent by a Chinese creditor to a Chinese borrower — it gives regulators a degree of control over debt problems that their Western counterparts can only dream of.

Even the makeup of China’s high debt levels has a silver lining for regulators. China’s aggregate ratio of debt to gross domestic product was almost 300 percent (or around $52 trillion) in September 2022, compared to 257 percent for the United States.

But less than 5 percent of China’s debt is external, amounting to $2.5 trillion, one-tenth of the U.S. level.

Ultimately, all of this serves the party’s absolute priority of maintaining social stability; there is zero tolerance for financial distress or major corporate failures that could trigger street demonstrations

instead of introducing reforms to establish a healthy market-based economy in which inefficient businesses are allowed to fail, China’s Evergrande-style fixes — while defusing short-term crises — reward irresponsible behavior and perpetuate the excessive borrowing and wasteful use of funding that leads to recurring financial distress.

Soft landings may become harder to achieve. China faces perhaps its greatest array of economic challenges since it began reopening to the outside world in the late 1970s: high debt, an ailing real estate sector, a long-term economic slowdown, rising unemployment, an aging and shrinking population and worsening trade and diplomatic relations with the United States.

There is a very real risk that China could suffer the same fate as Japan, which is still struggling to emerge from an extended period of economic stagnation that began in the 1990s. Japan’s troubles were caused, in part, by a burst real estate bubble and financial-sector problems similar to what China is now facing.

China’s regulatory troubleshooters have proven the financial doomsayers wrong again and again. But their biggest test may yet lie ahead.

in illustrating how far the politics of labor have changed in Washington in recent decades, there was perhaps no better bellwether than Senator John Hickenlooper of Colorado, a former business owner and self-described “extreme moderate.”

Mr. Hickenlooper conducted himself more respectfully and deferentially than most of his Democratic colleagues, applauding Mr. Schultz for “creating one of the most successful brands in American history” and declaring that “you know more about economics than I will ever know.” But in his questioning he aligned himself squarely with his party, pointing out that the rise of inequality in recent decades had coincided with the weakening of unions.

An aperiodic tiling displays no such “translational symmetry,” and mathematicians have long sought a single shape that could tile the plane in such a fashion. This is known as the einstein problem.

“I’m always messing about and experimenting with shapes,” said Mr. Smith, 64, who worked as a printing technician, among other jobs, and retired early. Although he enjoyed math in high school, he didn’t excel at it, he said. But he has long been “obsessively intrigued” by the einstein problem.

now a new paper — by Mr. Smith and three co-authors with mathematical and computational expertise — proves Mr. Smith’s discovery true. The researchers called their einstein “the hat,

“The most significant aspect for me is that the tiling does not clearly fall into any of the familiar classes of structures that we understand.”

black and white squares also can make weird nonperiodic patterns, in addition to the familiar, periodic checkerboard pattern. “It’s really pretty trivial to be able to make weird and interesting patterns,” he said. The magic of the two Penrose tiles is that they make only nonperiodic patterns — that’s all they can do.“But then the Holy Grail was, could you do with one — one tile?” Dr. Goodman-Strauss said.

Sir Roger found the proofs “very complicated.” Nonetheless, he was “extremely intrigued” by the einstein, he said: “It’s a really good shape, strikingly simple.”

When in November he found a tile that seemed to fill the plane without a repeating pattern, he emailed Craig Kaplan, a co-author and a computer scientist at the University of Waterloo.

The simplicity came honestly. Mr. Smith’s investigations were mostly by hand; one of his co-authors described him as an “imaginative tinkerer.”

“It was clear that something unusual was happening with this shape,” Dr. Kaplan said. Taking a computational approach that built on previous research, his algorithm generated larger and larger swaths of hat tiles. “There didn’t seem to be any limit to how large a blob of tiles the software could construct,”

The first step, Dr. Kaplan said, was to “define a set of four ‘metatiles,’ simple shapes that stand in for small groupings of one, two, or four hats.” The metatiles assemble into four larger shapes that behave similarly. This assembly, from metatiles to supertiles to supersupertiles, ad infinitum, covered “larger and larger mathematical ‘floors’ with copies of the hat,” Dr. Kaplan said. “We then show that this sort of hierarchical assembly is essentially the only way to tile the plane with hats, which turns out to be enough to show that it can never tile periodically.”

some might wonder whether this is a two-tile, not one-tile, set of aperiodic monotiles.

Dr. Goodman-Strauss had raised this subtlety on a tiling listserv: “Is there one hat or two?” The consensus was that a monotile counts as such even using its reflection. That leaves an open question, Dr. Berger said: Is there an einstein that will do the job without reflection?

“the hat” was not a new geometric invention. It is a polykite — it consists of eight kites. (Take a hexagon and draw three lines, connecting the center of each side to the center of its opposite side; the six shapes that result are kites.)

“It’s likely that others have contemplated this hat shape in the past, just not in a context where they proceeded to investigate its tiling properties,” Dr. Kaplan said. “I like to think that it was hiding in plain sight.”

Incredibly, Mr. Smith later found a second einstein. He called it “the turtle” — a polykite made of not eight kites but 10. It was “uncanny,” Dr. Kaplan said. He recalled feeling panicked; he was already “neck deep in the hat.”

Dr. Myers, who had done similar computations, promptly discovered a profound connection between the hat and the turtle. And he discerned that, in fact, there was an entire family of related einsteins — a continuous, uncountable infinity of shapes that morph one to the next.

this einstein family motivated the second proof, which offers a new tool for proving aperiodicity. The math seemed “too good to be true,” Dr. Myers said in an email. “I wasn’t expecting such a different approach to proving aperiodicity — but everything seemed to hold together as I wrote up the details.”

Mr. Smith was amazed to see the research paper come together. “I was no help, to be honest.” He appreciated the illustrations, he said: “I’m more of a pictures person.”

What specific things, besides stopping industrial espionage, could China do to increase trust? Giving American companies, financial institutions, more opportunities to make money, opening up its various sectors more aggressively — that will allow more dialogue, more cooperation

That’s one thing. Second, it’s understandable for the United States to push back on some of the industrial espionage.

What are the biggest blind spots the Chinese leadership has when it comes to understanding American policies toward the country? I think the Chinese leaders have this notion that the United States is doing everything it can to try to stop China from growing. Or they believe that whatever China does is not going to elicit more trust.

the leadership is convinced that there’s no way out of this. I’m not sure that is the case. And then also, the United States thinks that China wants to displace it.

That “despite” is doing a lot of work. It reminds me of that line, “Other than that, how was the play, Mrs. Lincoln?” I was trying to say that those are all things that we believe to be essential for sustained economic growth. I was saying that despite all that, China still performed well.

you also write about in the book: “Despite the limits China imposes on free-market forces, the absence of a free press, independent judicial system and the individual right to vote, we see there are other mechanisms in place to respond to the needs of its citizens and to address the threats posed by inequality.”

The spirit of Barabbas — the desire to seize or retain power, through violence if necessary — has been at war with the spirit of Christ ever since. Two millenniums of church history demonstrate a terrible truth: There was nothing uniquely evil about that ancient crowd. Instead it held up a mirror to our own nature, one that is all too eager to wield the sword, to believe that our own power is a prerequisite to justice.

Easter weekend contains more than one example of the spirit of Barabbas. When Christ was arrested, the Apostle Peter — a man who had been by his side for much of his ministry — still could not see the truth. He drew his sword, struck the high priest’s servant, and cut off his ear.

Though he was in the midst of an unjust arrest that would prove prelude to an unjust execution, Christ rebuked Peter, saying, “Put your sword back in its place, because all who take up the sword will perish by the sword.” As he reminded Peter, Jesus had the power to call on “legions of angels” to stop the arrest, but he chose not to. His purpose was to go to the cross, and as Jesus told us, that’s our purpose as well.

There is a difference between the quest for power and the quest for justice. Believers are required to “act justly.” We should not stand idly by in the face of exploitation or oppression. We do not retreat from the public square. But Christian engagement must be distinctive. It cannot emulate the world’s methods or morality.

the example of Jesus dominated the minds of civil rights leaders. “We discussed and debated the teachings of the great teacher, and we would ask questions about what would Jesus do,” said Lewis. “In preparing for the sit-ins, we felt that the message was one of love — the message of love in action: Don’t hate. If someone hits you, don’t strike back. Just turn the other side. Be prepared to forgive.”

The spirit of Barabbas was alive and well in the men who trained their fire hoses on peaceful protesters, who loosed dogs on the Black children of Birmingham. They weren’t trying to seize power, but they were trying to maintain it, through violent, lawless means. Their will to power collided with the quest for justice. It is only through God’s grace and the unimaginable courage and persistence of peaceful protesters that justice prevailed, and Jim Crow laws were overturned.

The spirit of Barabbas tempts Christians even today. You see it when armed Christians idolize their guns, when angry Christians threaten and attempt to intimidate their political opponents, when fearful Christians adopt the tactics and ethos of Trumpism to preserve their power. The spirit of Barabbas most clearly captured the mob on Jan. 6, when praying Americans participated in an insurrection based on a lie.

Christ did not reject earthly rule so that his flawed followers could seize the world’s thrones. His ethos was clear: “You know that the rulers of the gentiles lord it over them, and those in high positions act as tyrants over them. It must not be like that among you. On the contrary, whoever wants to become great among you must be your servant.”

Among many progressive leaders, though, it’s been received eagerly and gratefully. It “helped to put language to tensions and trends facing our movement organizations,” Christopher Torres, an executive director of the Leadership for Democracy and Social Justice institute, said at a Tuesday webinar devoted to the article.

Mitchell’s piece systematically lays out some of the assertions and assumptions that have paralyzed progressive outfits.

Among them are maximalism, or “considering anything less than the most idealistic position” a betrayal; a refusal to distinguish between discomfort and oppression; and reflexive hostility to hierarchy.

He criticizes the insistence “that change on an interpersonal or organizational level must occur before it is sought or practiced on a larger scale,” an approach that keeps activists turned inward, along with the idea that progressive organizations should be places of therapeutic healing.

All the problems Mitchell elucidates have been endemic to the left for a long time. Destructive left-wing purity spirals are at least as old as the French Revolution.

It’s not surprising that such counterproductive tendencies became particularly acute during the pandemic, when people were terrified, isolated and, crucially, very online

“On balance, I think social media has been bad for democracy,” Mitchell told me.

as Mitchell wrote in his essay, social media platforms reward shallow polemics, “self-aggrandizement, competition and conflict.” These platforms can give power to the powerless, but they also bestow it on the most disruptive and self-interested people in any group, those likely to take their complaints to Twitter rather than to their supervisors or colleagues.

The gamification of discourse through likes and retweets, he said, “flies in the face of building solidarity, of being serious about difference, of engaging in meaningful debate and struggle around complex ideas.”

The publication of “Building Resilient Organizations” and the conversation around it are signs that the fever Mitchell describes is beginning to break.

that doesn’t mean the dysfunctions Mitchell identified will go away on their own once people start spending more time together. He puts much of the onus on leaders to be clear with employees about the missions of their organizations and their decision-making processes and to take emotional maturity into account in hiring decisions.

the ultimate aim of social justice work should not be the refinement of one’s own environment. “Building resilient and strong organizations is not the end goal,” said Mitchell. “It’s a means to building power so we can defeat an authoritarian movement that wants to take away democracy.” Here’s to remembering that in 2023.

But to understand why Republicans have died at higher rates, you can’t look at vaccine status alone. Congressional districts controlled by a trifecta of Republican leaders—state governor, Senate, and House—had an 11 percent higher death rate, according to the Lancet study. A likely explanation, the authors write, could be that in the post-vaccine era, those leaders chose policies and conveyed public-health messages that made their constituents more likely to die. Although we still can’t say these decisions led to higher death rates, the association alone is jarring.

One of the most compelling studies comes from researchers at Yale, who published their findings as a working paper in November. They link political party and excess-death rate—the percent increase in deaths above pre-COVID levels—among those registered as either Democrats or Republicans, providing a more granular view. They chose to analyze data from Florida and Ohio from before and after vaccines were available. Looking at the period before the vaccine,  researchers found a 1.6 percentage-point difference in excess death rate among Republicans and Democrats, with a higher rate among Republicans. But after vaccines became available, that gap widened dramatically to 10.4 percentage points, again with a higher Republican excess death rate. “When we compare individuals who are of the same age, who live in the same county in the same month of the pandemic, there are differences correlated with your political-party affiliation that emerge after vaccines are available,”

What’s most concerning about all of this is that partisan disparities in death rates were also apparent before COVID. People living in Republican jurisdictions have been at a health disadvantage for more than 20 years. From 2001 to 2019, the death rate in Democratic counties decreased by 22 percent, according to a recent study; in Republican counties, it declined by only 11 percent. In the same time period, the political gap in death rates increased sixfold.

over the decades, state policy decisions on health issues such as Medicaid, gun legislation, tobacco taxes, and, indeed, vaccines have likely had a stronger impact on state health trajectories than other factors

the long-term decline of health in red states indicates that there is an ongoing problem at a high level in Republican-led places, and that something has gone awry. “If you happen to live in certain states, your chances for living a long life are going to be much higher than if you’re an American living in a different state,”

o acknowledge how many Republicans didn’t have to die would mean giving credence to scientific and medical expertise. So long as America remains locked in a poisonous partisan battle in which science is wrongly dismissed as being associated with the left, the death toll will only rise.

Karahan Tepe, and its penis chamber, and everything that inexplicably surrounds the chamber – shrines, cells, altars, megaliths, audience halls et al – is vastly older than anything comparable, and plumbs quite unimaginable depths of time, back before agriculture, probably back before normal pottery, right back to a time when we once thought human ‘civilisation’ was simply impossible.

After all, hunter gatherers – cavemen with flint arrowheads – without regular supplies of grain, without the regular meat and milk of domesticated animals, do not build temple-towns with water systems.

Taken together with its age, complexity, sophistication, and its deep, resonant mysteriousness, and its many sister sites now being unearthed across the Harran Plains – collectively known as the Tas Tepeler, or the ‘stone hills’ – these carved, ochre-red rocks, so silent, brooding, and watchful in the hard whirring breezes of the semi-desert, constitute what might just be the greatest archaeological revelation in the history of humankind.

The solitary Kurdish man, on that summer’s day in 1994, had made an irreversibly profound discovery – which would eventually lead to the penis pillars of Karahan Tepe, and an archaeological anomaly which challenges, time and again, everything we know of human prehistory.

in late 1994 the German archaeologist Klaus Schmidt came to the site of Gobekli Tepe to begin his slow, diligent excavations of its multiple, peculiar, enormous T-stones, which are generally arranged in circles – like the standing stones of Avebury or Stonehenge. Unlike European standing stones, however, the older Turkish megaliths are often intricately carved: with images of local fauna. Sometimes the stones depict cranes, boars, or wildfowl: creatures of the hunt. There are also plenty of leopards, foxes, and vultures. Occasionally these animals are depicted next to human heads.

over time archaeological experts began to accept the significance. Ian Hodden, of Stanford University, declared that: ‘Gobekli Tepe changes everything.’ David Lewis-Williams, the revered professor of archaeology at Witwatersrand University in Johannesburg, said, at the time: ‘Gobekli Tepe is the most important archaeological site in the world.’

Urfa man now has a silent hall of his own in one of Turkey’s greatest archaeological galleries. More importantly, we can now see that Urfa man has the same body stance of the T-shaped man-pillars at Gobekli (and in many of the Tas Tepeler): his arms are in front of him, protecting his penis

‘Gobekli Tepe upends our view of human history. We always thought that agriculture came first, then civilisation: farming, pottery, social hierarchies. But here it is reversed, it seems the ritual centre came first, then when enough hunter gathering people collected to worship – or so I believe – they realised they had to feed people. Which means farming.’ He waved at the surrounding hills, ‘It is no coincidence that in these same hills in the Fertile Crescent men and women first domesticated the local wild einkorn grass, becoming wheat, and they also first domesticated pigs, cows and sheep. This is the place where Homo sapiens went from plucking the fruit from the tree, to toiling and sowing the ground.’

People were already speculating that – if you see the Garden of Eden mythos as an allegory of the Neolithic Revolution: i.e. our fall from the relative ease of hunter-gathering to the relative hardships of farming (and life did get harder when we first started farming, as we worked longer hours, and caught diseases from domesticated animals), then Gobekli Tepe and its environs is probably the place where this happened

‘I believe Gobekli Tepe is a temple in Eden’. It’s a quote I reused, to some controversy, because people took Klaus literally. But he did not mean it literally. He meant it allegorically.

‘We have found no homes, no human remains. Where is everyone, did they gather for festivals, then disperse? As for their religion, I have no real idea, perhaps Gobekli Tepe was a place of excarnation, for exposing the bones of the dead to be consumed by vultures, so the bodies have all gone

I do definitely know this: some time in 8000 BC the creators of Gobekli Tepe buried their great structures under tons of rubble. They entombed it. We can speculate why. Did they feel guilt? Did they need to propitiate an angry God? Or just want to hide it?’ Klaus was also fairly sure on one other thing. ‘Gobekli Tepe is unique.’

These days Gobekli Tepe is not just a famous archaeological site, it is a Unesco World-Heritage-listed tourist honeypot which can generate a million visitors a year. It is all enclosed by a futuristic hi-tech steel-and-plastic marquee (no casual wandering around taking photos of the stones and workers

Necmi shows me the gleaming museum built to house the greatest finds from the region: including a 11,000 year old statue, retrieved from beneath the centre of Sanliurfa itself, and perhaps the world’s oldest life size carved human figure

This number is so large it is hard to take in. For comparison the Great Pyramid at Giza is 4,500 years old. Stonehenge is 5,000 years old. The Cairn de Barnenez tomb-complex in Brittany, perhaps the oldest standing structure in Europe, could be up to 7,000 years old.

Aslan tells me how archaeologists at Gobekli have also, more recently, found tantalising evidence of alcohol: huge troughs with the chemical residue of fermentation, indicating mighty ritual feasts, maybe.

he explains how scientists at Karahan Tepe, as well as Gobekli Tepe, have now found evidence of homes.

The builders lived here. They ate their roasted game here. They slept here. And they used, it seems, a primitive but poetic form of pottery, shaped from polished stone. They possibly did elaborate manhood rituals in the Karahan Tepe penis chambe

Yet still we have no sign at all of contemporary agriculture; they were, it still appears, hunter gatherers, but of unnerving sophistication.

Another unnerving oddity is the curious number of carvings which show people with six fingers. Is this symbolic, or an actual deformity? Perhaps the mark of a strange tribe?

Karahan Tepe is stupefyingly big. ‘So far,’ he says, ‘We have dug up maybe 1 per cent of the site’ – and it is already impressive. I ask him how many pillars – T stones – might be buried here. He casually points at a rectangular rock peering above the dry grass. ‘That’s probably another megalith right there, waiting to be excavated. I reckon there are probably thousands more of them, all around us. We are only at the beginning. And there could be dozens more Tas Tepeler we have not yet found, spread over hundreds of kilometres.’

Karahan too was definitely and purposely buried. That is the reason Necmi and his team were able to unearth the penis pillars so quickly, all they had to do was scoop away the backfill, exposing the phallic pillars, sculpted from living rock.

the most remarkable answer of all, and it is this: archaeologists in southeastern Turkey are, at this moment, digging up a wild, grand, artistically coherent, implausibly strange, hitherto-unknown-to-us religious civilisation, which has been buried in Mesopotamia for ten thousand years. And it was all buried deliberately.

Authoritarian governments have created seemingly realistic news broadcasters to advance their political goals

Getty’s lawsuit reflects concerns raised by many individual artists — that A.I. companies are becoming a competitive threat by copying content they do not have permission to use.

“The tools are going to get better, they’re going to get cheaper, and there will come a day when nothing you see on the internet can be believed,” said Wasim Khaled, chief executive of Blackbird.AI, a company that helps clients fight disinformation.

Artificial intelligence allows virtually anyone to create complex artworks, like those now on exhibit at the Gagosian art gallery in New York, or lifelike images that blur the line between what is real and what is fiction. Plug in a text description, and the technology can produce a related image — no special skills required.

Midjourney’s images, he said, were able to pass muster in facial-recognition programs that Bellingcat uses to verify identities, typically of Russians who have committed crimes or other abuses. It’s not hard to imagine governments or other nefarious actors manufacturing images to harass or discredit their enemies.

In February, Getty accused Stability AI of illegally copying more than 12 million Getty photos, along with captions and metadata, to train the software behind its Stable Diffusion tool. In its lawsuit, Getty argued that Stable Diffusion diluted the value of the Getty watermark by incorporating it into images that ranged “from the bizarre to the grotesque.”

Experts fear the technology could hasten an erosion of trust in media, in government and in society. If any image can be manufactured — and manipulated — how can we believe anything we see?

Trademark violations have also become a concern: Artificially generated images have replicated NBC’s peacock logo, though with unintelligible letters, and shown Coca-Cola’s familiar curvy logo with extra O’s looped into the name.

The threat to photographers is fast outpacing the development of legal protections, said Mickey H. Osterreicher, general counsel for the National Press Photographers Association

Newsrooms will increasingly struggle to authenticate conten

Social media users are ignoring labels that clearly identify images as artificially generated, choosing to believe they are real photographs, he said.

The video explained that the deepfake had been created, with Ms. Schick’s consent, by the Dutch company Revel.ai and Truepic, a California company that is exploring broader digital content verification

The companies described their video, which features a stamp identifying it as computer-generated, as the “first digitally transparent deepfake.” The data is cryptographically sealed into the file; tampering with the image breaks the digital signature and prevents the credentials from appearing when using trusted software.

The companies hope the badge, which will come with a fee for commercial clients, will be adopted by other content creators to help create a standard of trust involving A.I. images.

“The scale of this problem is going to accelerate so rapidly that it’s going to drive consumer education very quickly,” said Jeff McGregor, chief executive of Truepic

Adobe unveiled its own image-generating product, Firefly, which will be trained using only images that were licensed or from its own stock or no longer under copyright. Dana Rao, the company’s chief trust officer, said on its website that the tool would automatically add content credentials — “like a nutrition label for imaging” — that identified how an image had been made. Adobe said it also planned to compensate contributors.

Dr. Monteiro and his colleagues developed a food classification system called Nova, named after the Portuguese and Latin words for “new.” It has since been adopted by researchers across the world.

Unprocessed or minimally processed foods, like fresh or frozen fruits and vegetables, beans, lentils, meat, poultry, fish, eggs, milk, plain yogurt, rice, pasta, corn meal, flour, coffee, tea and herbs and spices.

Processed culinary ingredients, such as cooking oils, butter, sugar, honey, vinegar and salt.

If you look at the ingredient list and you see things that you wouldn’t use in home cooking, then that’s probably an ultraprocessed food,”

his group includes freshly baked bread, most cheeses and canned vegetables, beans and fish. These foods may contain preservatives that extend shelf life.

Ultraprocessed foods made using industrial methods and ingredients you wouldn’t typically find in grocery stores — like high-fructose corn syrup, hydrogenated oils and concentrated proteins like soy isolate.

They often contain additives like flavorings, colorings or emulsifiers to make them appear more attractive and palatable.

Think sodas and energy drinks, chips, candies, flavored yogurts, margarine, chicken nuggets, hot dogs, sausages, lunch meats, boxed macaroni and cheese, infant formulas and most packaged breads, plant milks, meat substitutes and breakfast cereals.

Processed foods made by combining foods from Category 1 with the ingredients of Category 2 and preserving or modifying them with relatively simple methods like canning, bottling, fermentation and baking

That has led to debate among nutrition experts about whether it’s useful for describing the healthfulness of a food, partly since many UPFs — like whole grain breads, flavored yogurts and infant formulas — can provide valuable nutrients

Most research linking UPFs to poor health is based on observational studies, in which researchers ask people about their diets and then track their health over many years.

Why might UPFs be harmful?

In a large review of studies that was published in 2024, scientists reported that consuming UPFs was associated with 32 health problems, with the most convincing evidence for heart disease-related deaths, Type 2 diabetes and common mental health issues like anxiety and depression.

Such studies are valuable, because they can look at large groups of people — the 2024 review included results from nearly 10 million — over the many years it can take for chronic health conditions to develop

She added that the consistency of the link between UPFs and health issues increased her confidence that there was a real problem with the foods.

But the observational studies also have limitations,

It’s true that there is a correlation between these foods and chronic diseases, she said, but that doesn’t mean that UPFs directly cause poor health.

Dr. O’Connor questioned whether it’s helpful to group such “starkly different” foods — like Twinkies and breakfast cereals — into one category. Certain types of ultraprocessed foods, like sodas and processed meats, are more clearly harmful than others

UPFs like flavored yogurts and whole grain breads, on the other hand, have been associated with a reduced risk of developing Type 2 diabetes.

Clinical trials are needed to test if UPFs directly cause health problems, Dr. O’Connor said. Only one such study, which was small and had some limitations, has been done, s

In that study, published in 2019, 20 adults with a range of body sizes lived in a research hospital at the National Institutes of Health for four weeks. For two weeks, they ate mainly unprocessed or minimally processed foods, and for another two weeks, they ate mainly UPFs. The diets had similar amounts of calories and nutrients, and the participants could eat as much as they wanted at each meal.

During their two weeks on the ultraprocessed diet, participants gained an average of two pounds and consumed about 500 calories more per day than they did on the unprocessed diet

During their time on the unprocessed diet, they lost about two pounds.

That finding might help explain the link between UPFs, obesity and other metabolic conditions

The Nova system notably doesn’t classify foods based on nutrients like fat, fiber, vitamins or minerals. It’s “agnostic to nutrition,”

There are many “strong opinions” about why ultraprocessed foods are unhealthy, Dr. Hall said. “But there’s actually not a lot of rigorous science” on what those mechanisms are

Because UPFs are often cheap, convenient and accessible, they’re probably displacing healthier foods from our diets

the foods could be having more direct effects on health. They can be easy to overeat — maybe because they contain hard-to-resist combinations of carbohydrates, sugars, fats and salt, are high-calorie and easy to chew

It’s also possible that resulting blood sugar spikes may damage arteries or ramp up inflammation, or that certain food additives or chemicals may interfere with hormones, cause a “leaky” intestine or disrupt the gut microbiome.

Researchers, including Dr. Hall and Dr. Davy, are beginning to conduct small clinical trials that will test some of these theories.

most researchers think there are various ways the foods are causing harm. “Rarely in nutrition is there a single factor that fully explains the relationship between foods and some health outcome,”

In 2014, Dr. Monteiro helped write new dietary guidelines for Brazil that advised people to avoid ultraprocessed foods.

Other countries like Mexico, Israel and Canada have also explicitly recommended avoiding or limiting UPFs or “highly processed foods.”

The U.S. dietary guidelines contain no such advice, but an advisory committee is currently looking into the evidence on how UPFs may affect weight gain, which could influence the 2025 guidelines.

It’s difficult to know what to do about UPFs in the United States, where so much food is already ultraprocessed and people with lower incomes can be especially dependent on them,

“At the end of the day, they are an important source of food, and food is food,” Dr. Mattei added. “We really cannot vilify them,”

While research continues, expert opinions differ on how people should approach UPFs.

the safest course is to avoid them altogether

to swap flavored yogurt for plain yogurt with fruit, for example, or to buy a fresh loaf from a local bakery instead of packaged bread, if you can afford to do so

Dr. Vadiveloo suggested a more moderate strategy, focusing on limiting UPFs that don’t provide valuable nutrients, like soda and cookies

She also recommended eating more fruits, vegetables, whole grains (ultraprocessed or not), legumes, nuts and seeds.

Cook at home as much as you can, using minimally processed foods

It’s why the “bad war” of Vietnam was only escaped at the cost of betraying the South Vietnamese and making a deal with yet another monster in Beijing.

The alternative is a form of argument in which essential aspects of the world, being inconvenient to moral absolutism, simply disappear.

A “realist” foreign policy can slide from describing power to excusing depredations.

But seeing statecraft as a tragic balancing of evils is still essential, especially amid the kind of moral fervor that attends a conflict like Israel’s war in Gaza.

But in active controversies the tragic vision can seem like a cold way of looking at the world. Lean into it too hard, and you get accused of ignoring injustice or recapitulating the indifference that gave cover to past atrocities.

The difficulty is that liberal “freedom” is on offer almost nowhere in the Middle East, certainly not in Gaza under Hamas’s rule, and the most challenging “otherness of beliefs” in this situation are the beliefs that motivated the massacres of Oct. 7.

a hype around Israeli moral failures — it's not enough for a war that yields so many casualties to be unjust, if it’s wrong it must be genocide — that ends up suppressing the harsh implications of a simple call for peace.

A representative passage, from Pankaj Mishra in The London Review of Books, describes many protesters as “motivated by the simple wish to uphold the ideals that seemed so universally desirable after 1945: respect for freedom, tolerance for the otherness of beliefs and ways of life; solidarity with human suffering; and a sense of moral responsibility for the weak and persecuted.”

No doubt many campus protesters have these motivations.

The alternative articulated by, for instance, Mitt Romney — “We stand by allies, we don’t second-guess them” — is not a serious policy for a hegemon balancing its global obligations

For example, reading the apologia for pro-Palestinian protests from certain left-wing intellectuals, you have a sense of both elision and exaggeration

seem untroubled by this fact, and perfectly comfortable with supporting not just peaceful negotiation but a revolutionary struggle led by Islamist fanatics.

Which yields the moral dilemma the protests don’t acknowledge: Ending the war on the terms they want could grant a major strategic victory to the regional alliance dedicated to the murder of Israelis and their expulsion from the Middle East.

Maybe the Gaza war is unjust enough, and Israeli goals unachievable enough, that there’s no alternative to vindicating Hamas’s blood-soaked strategy

you have to be honest about what you’re endorsing: a brutal weighing-out of evils, not any sort of triumph for “universally desirable” ideals.

Then a similar point applies to supporters of the Israeli war, for whom moral considerations — the evil of Hamas, the historical suffering of the Jewish people, the special American relationship with Israel — are invoked as an argument-ender in an inflexible way

We are constantly urged to “stand with Israel” when it’s unclear if Israel knows what it’s doing.

Joe Biden’s administration is chastised for betrayal when it tries to influence Israel’s warmaking, even though the Israeli government’s decisions before and since Oct. 7 do not inspire great confidence.

Biden’s specific attempts to micromanage the conflict may be misguided or hamfisted

But it’s not misguided for America, an imperium dealing with multiplying threats, to decline to write a blank check for a war being waged without a clear plan for victory or for peace.

Another difficulty is that some instigators of the protests

In each case, you have a desire that mirrors the impulse of the left-wing intellectuals — to make foreign policy easy by condensing everything to a single moral judgment. But the problems of the world cannot be so easily reduced.

Being cold-eyed and tragic-minded does not mean abandoning morality. But it means recognizing that often nobody is simply right, no single approach is morally obvious, and no strategy is clean.

It’s dropping in developing countries, too. India surpassed China as the most populous country last year, yet its fertility is now below replacement.

“The demographic winter is coming,”

Smaller populations come with diminished global clout, raising questions in the U.S., China and Russia about their long-term standings as superpowers.

Some demographers think the world’s population could start shrinking within four decades—one of the few times it’s happened in history.

A year ago Japanese Prime Minister Fumio Kishida declared that the collapse of the country’s birthrate left it “standing on the verge of whether we can continue to function as a society.”

Had fertility stayed near 2.1, where it stood in 2007, the U.S. would have welcomed an estimated 10.6 million more babies since

In 2017, when the global fertility rate—a snapshot of how many babies a woman is expected to have over her lifetime—was 2.5, the United Nations thought it would slip to 2.4 in the late 2020s. Yet by 2021, the U.N. concluded, it was already down to 2.3—close to what demographers consider the global replacement rate of about 2.2

He has found that national birth registries are typically reporting births 10% to 20% below what the U.N. projected.

China reported 9 million births last year, 16% less than projected in the U.N.’s central scenario. In the U.S., 3.59 million babies were born last year, 4% less than the U.N. projected. In other countries, the undershoot is even larger: Egypt reported 17% fewer births last year. In 2022, Kenya reported 18% fewer.

In 2017 the U.N. projected world population, then 7.6 billion, would keep climbing to 11.2 billion in 2100. By 2022 it had lowered and brought forward the peak to 10.4 billion in the 2080s. That, too, is likely out of date

the University of Washington now thinks it will peak around 9.5 billion in 2061 then start declining. 

The falling birthrates come with huge implications for the way people live, how economies grow and the standings of the world’s superpowers.

In the U.S., a short-lived pandemic baby boomlet has reversed. The total fertility rate fell to 1.62 last year, according to provisional government figures, the lowest on record.

In 2017, when the fertility rate was 1.8, the Census Bureau projected it would converge over the long run to 2.0. It has since revised that down to 1.5. “It has snuck up on us,”

Historians refer to the decline in fertility that began in the 18th century in industrializing countries as the demographic transition. As lifespans lengthened and more children survived to adulthood, the impetus for bearing more children declined. As women became better educated and joined the workforce, they delayed marriage and childbirth, resulting in fewer children. 

Some demographers see this as part of a “second demographic transition,” a societywide reorientation toward individualism that puts less emphasis on marriage and parenthood, and makes fewer or no children more acceptable. 

In research published in 2021, the University of Maryland’s Kearney and two co-authors looked for possible explanations for the continued drop. They found that state-level differences in parental abortion notification laws, unemployment, Medicaid availability, housing costs, contraceptive usage, religiosity, child-care costs and student debt could explain almost none of the decline

“We suspect that this shift reflects broad societal changes that are hard to measure or quantify,” they conclude.

while raising children is no more expensive than before, parents’ preferences and perceived constraints have changed

“If people have a preference for spending time building a career, on leisure, relationships outside the home, that’s more likely to come in conflict with childbearing.” 

Once a low fertility cycle kicks in, it effectively resets a society’s norms and is thus hard to break, said Jackson. “The fewer children you see your colleagues and peers and neighbors having, it changes the whole social climate,”

Fertility is below replacement in India even though the country is still poor and many women don’t work—factors that usually sustain fertility.

Urbanization and the internet have given even women in traditional male-dominated villages a glimpse of societies where fewer children and a higher quality of life are the norm. “People are plugged into the global culture,

mothers and fathers, especially those that are highly educated, spend more time with their children than in the past. “The intensity of parenting is a constraint,”

Sub-Saharan Africa once appeared resistant to the global slide in fertility, but that too is changing. The share of all women of reproductive age using modern contraception grew from 17% in 2012 to 23% in 2022

Jose Rimon, a professor of public health at Johns Hopkins University, credits that to a push by national leaders in Africa which, he predicted, would drive fertility down faster than the U.N. projects. 

Mae Mariyam Thomas, 38, who lives in Mumbai and runs an audio production company, said she’s opted against having children because she never felt the tug of motherhood. She sees peers struggling to meet the right person, getting married later and, in some instances, divorcing before they have kids. At least three of her friends have frozen their eggs,

Danielle Vermeer grew up third in a family of four children on Chicago’s North Side, where her neighborhood was filled with Catholics of Italian, Irish and Polish descent and half her close friends had as many siblings as her or more.

Her Italian-American father was one of four children who produced 14 grandchildren. Now her parents have five grandchildren, including Vermeer’s two children, ages 4 and 7.

The 35-year-old, who is the co-founder of a fashion thrifting app, said that before setting out to have children, she consulted dozens of other couples and her Catholic church and read at least eight books on the subject, including one by Pope Paul VI. She and her husband settled on two as the right number.“The act of bringing a child into this world is an incredible responsibility,” she said.

Perhaps no country has been trying longer than Japan. After fertility fell to 1.5 in the early 1990s, the government rolled out a succession of plans that included parental leave and subsidized child care. Fertility kept falling.

In 2005, Kuniko Inoguchi was appointed the country’s first minister responsible for gender equality and birthrate. The main obstacle, she declared, was money: People couldn’t afford to get married or have children. Japan made hospital maternity care free and introduced a stipend paid upon birth of the child. 

Japan’s fertility rate climbed from 1.26 in 2005 to 1.45 in 2015. But then it started declining again, and in 2022 was back to 1.26.

This year, Prime Minister Fumio Kishida rolled out yet another program to increase births that extends monthly allowances to all children under 18 regardless of income, free college for families with three children, and fully paid parental leave.

noguchi, now a member of parliament’s upper house, said the constraint on would-be parents is no longer money, but time. She has pressed the government and businesses to adopt a four-day workweek

If you’re a government official or manager of a big corporation, you should not worry over questions of salary now, but that in 20 years time you will have no customers, no clients, no applicants to the Self-Defense Forces.”

Hungarian Prime Minister Viktor Orban has pushed one of Europe’s most ambitious natality agendas. Last year he expanded tax benefits for mothers so that women under the age of 30 who have a child are exempt from paying personal income tax for life. That’s on top of housing and child-care subsidies as well as generous maternity leaves. 

Hungary’s fertility rate, though still well below replacement, has risen since 2010. But the Vienna Institute of Demography attributed this primarily to women delaying childbirth because of a debt crisis that hit around 2010. Adjusted for that, fertility has risen only slightly, it concluded.

The usual prescription in advanced countries is more immigration, but that has two problems.

With no reversal in birthrates in sight, the attendant economic pressures are intensifying. Since the pandemic, labor shortages have become endemic throughout developed countries. That will only worsen in coming years as the postcrisis fall in birthrates yields an ever-shrinking inflow of young workers, placing more strain on healthcare and retirement systems.

worsening demographics could make this a second consecutive “lost decade” for global economic growth.

The Institute for Health Metrics and Evaluation found little evidence that pronatalist policies lead to sustained rebounds in fertility. A woman may get pregnant sooner to capture a baby bonus, researchers say, but likely won’t have more kids over the course of her lifetime.

As more countries confront stagnant population, immigration between them is a zero-sum gam

Historically, host countries have sought skilled migrants who enter through formal, legal channels, but recent inflows have been predominantly unskilled migrants often entering illegally and claiming asylum.

High levels of immigration have also historically aroused political resistance,

Many of the leaders keenest to raise birthrates are most resistant to immigratio

As birthrates fall, more regions and communities experience depopulation, with consequences ranging from closed schools to stagnant property values. Less selective colleges will soon struggle to fill classrooms because of the plunge in birthrates that began in 2007, said Fernández-Villaverde. Vance said rural hospitals can’t stay open because of the falling local population.

An economy with fewer children will struggle to finance pensions and healthcare for growing ranks of elderly. South Korea’s national pension fund, one of the world’s largest, is on track to be depleted by 2055

There’s been little public pressure to act, said Sok Chul Hong, an economist at Seoul National University. “The elderly are not very interested in pension reform, and the youth are apathetic towards politics,” he said. “It is truly an ironic situation.”

Berlin, like Washington, has tried to position itself as a concerned friend, intent on ensuring Israel’s long-term security by not allowing it to go so far that it loses even more international backing. But the stakes are high for Germany, too.

The country needs to maintain friendly relations around the world to pursue its own interests, whether Europe is cutting deals with Egypt to curb migration or seeking support for measures to back Ukraine against Russia

this week, Germany’s foreign minister, Annalena Baerbock, said she would be sending a delegation to Israel because as a signatory to the Geneva Conventions, her country “is obliged to remind all parties of their duty to abide by international humanitarian law.”

The sense of diminishing credibility on human rights is particularly strong in the set of developing or underdeveloped countries sometimes referred to as the Global South, a point brought home during a visit to Berlin this month by Malaysia’s prime minister, Anwar Ibrahim.

“We oppose colonialism, or apartheid, or ethnic cleansing, or dispossession of any country, be it in Ukraine, or in Gaza,” Mr. Ibrahim told journalists as he stood beside Mr. Scholz. “Where have we thrown our humanity? Why this hypocrisy?”

polls by public broadcasters in recent weeks show that nearly 70 percent of Germans surveyed felt Israel’s military actions were not justifiable; just a few weeks earlier, the number was around 50 percent.

On the one hand, she said, Germany was calling on Israel not to invade Rafah. On the other, Germany remained one of Israel’s biggest arms suppliers. “We have to really do something to protect these people.”

Anecdotally, it seems like everybody knows someone who has dropped out of the mainstream, vowing to vote for the AfD or talking about emigrating

What has started to dawn on us in recent months, and what the meeting in Potsdam laid bare, is that the far right is not about having horrific ideas — it is about enacting horrific ideas.

Germany’s far-right adherents really mean it. With funding, support and a very real chance of winning federal states this year, they are closer to power than they have ever been in the nearly 75-year history of post-Nazi Germany.

In his recent book “Triggerpunkte,” or “Trigger Points,” Steffen Mau, a sociologist at Humboldt University in Berlin, rejects the notion that German society is polarized neatly in two. In Germany, he argues, divisions instead run through several areas such as climate, migration and social justice. You can be moved by some issues, indifferent to others

In recent months, those motivated by their opposition to migration or climate policies were the most vocal and visible. Now those who care about democracy, minority rights and the rule of law have reached their trigger point, too.