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Mr. Biden appeared content to keep North Korea on the back burner, even though President Barack Obama told Mr. Trump in November 2016 that North Korea should be Washington’s top national security priority. Mr. Biden has yet to name a candidate to be ambassador to South Korea. The special envoy for North Korea, Sung Kim, is a veteran diplomat who has dealt with these issues before, but he is doing the job part-time — he is also ambassador to Indonesia.

North Korean scientists have obviously been working on the weapons program, which is central to Pyongyang’s propaganda and Mr. Kim’s main leverage in negotiations with the United States and other nations. The more weapons Mr. Kim has and the more powerful they are, the greater his stature both inside and outside North Korea.

Siegfried Hecker, a nuclear scientist at Stanford University who has visited North Korea, estimated the country very likely has enough nuclear material for about 45 warheads, an increase of about 20 since the end of the Obama administration. He also gave an upper-end number of 60.

But the leaders of those two East Asian nations are divided in their approach and remain embroiled in bitter disputes over separate issues of history and war. Japanese officials are critical of Mr. Moon’s North Korea policy. In November, Wendy Sherman, the deputy secretary of state and an experienced negotiator on North Korea and Iran, hosted a meeting with her South Korean and Japanese counterparts in Washington, but long-running hostilities resulted in an awkward news conference.

One of the biggest dilemmas is how to work with China to curb North Korea’s weapons program. The Chinese leader, Xi Jinping, and his colleagues are balancing various goals: They want to end the disruption caused by Mr. Kim’s weapons while also seeking to avoid a failed state on their border or Pyongyang growing close to Washington or Seoul.

China is by far North Korea’s biggest trading partner. Although it has approved of U.N. sanctions on occasion, it and Russia began asking in 2019 for partial relief of the Obama- and Trump-era sanctions. For a period, it was enforcing those sanctions, but then it began helping North Korea circumvent them as Beijing-Washington relations deteriorated.

A handful of financial institutions produced them when Rio de Janeiro hosted in 2016, using a mixture of macroeconomic indicators and performances at previous Olympics to forecast total medal hauls for each country.

Gracenote’s distinguishing feature is the ability to produce quantitative analysis for each event.

Gracenote still uses the old system to produce its public medal table, which also deals in absolute forecasts, rather than fractional ones. If a French athlete, say, is the most likely to win an event, France gets awarded one gold medal in the table, even though the true probability of the athlete winning gold is less than 100% and his chances of claiming silver and bronze are greater than 0%.

the Elo rating system, which was developed for chess by Arpad Elo, a Hungarian physicist. The formula exchanges ranking points from the loser to the winner, with greater rewards for beating stronger opponents. The difference in ratings points between two rivals can be easily used to calculate the probability that one will beat the other.

Yet only two events on the winter Olympics programme, curling and ice hockey, involve head-to-head contests.

Those that compete in teams have their scores blended with their compatriots. And for those that participate in a number of events, such as Ms Dahlmeier, results in related disciplines affect multiple ratings. A strong performance in the biathlon sprint, a group race, would boost her ranking in the pursuit, a staggered race, for example.

The best way to answer that question is to take every previous contest in the sport and analyse how past results correlate with future success.

The bans have benefited Norway most, as the country will likely gain of the five of the 12 foregone medals—enough to nudge it ahead of Germany into first place in terms of total medals won.

Mr Gleave notes that the favourite only wins about 30% of the time, a lower share than in any other winter sport. Ms Dahlmeier’s rating has dwindled a little, but not by enough to suggest that last year’s record breaker has become this year’s flop.

Gracenote’s research into age curves for each sport shows that the best biathletes can maintain their peak performance into their early 30s (see chart). Expect to see more event-by-event forecasting at future Olympics, too.

economic output must flow either to owners of capital, in the form of profits, dividends and rents, or to labour, as wages, salaries and perks. Economists refer to this as the “capital” or “labour” share of GDP. Who has the upper hand in the post-lockdown economy?

First we calculate a high-frequency measure of the capital-labour share across 30 mostly rich countries.

In 2020 the aggregate labour share across this group soared (see chart 1). This was largely because firms continued to pay people’s wages—helped, in large part, by government-stimulus programmes—even as GDP collapsed. Advantage, labour.

More recently, however, the battle seems to have shifted in favour of capital.

most economists anyway argue that labour’s share is not a perfect gauge of economic fairness, since it is so hard to measure.

In the first camp is Britain. There, underlying wage growth is in the region of 5% a year, unusually fast by rich-world standards.

But corporations seem not to have much pricing power, meaning that they are struggling to fully offset higher costs in the form of higher prices.

Labour seems to be winning out at the expense of capital.

The second group consists of most other rich countries outside America.

There, neither labour nor capital seems able to triumph. After correcting for pandemic-related distortions Japan’s pay growth appears to be slowing to below 1% a year

Pay settlements in Italy and Spain are treading water, while wage growth in Australia, France and Germany remains well below where it was before the pandemic. Workers in these places are not really joining in with the inflationary party.

In Europe pre-tax profit margins, as measured in the national accounts, have risen in recent months but remain below where they were just before the pandemic.

In Japan the “recurring” profits before tax of large and medium-sized firms recently returned to pre-pandemic levels. The profits of smaller firms remain well below, however.

A series of unusually large stimulus payments may mean that households are able to absorb the higher prices that companies impose.

Wages are rising, but nonetheless markups are responsible for more than 70% of inflation since late 2019,

In a recent report, analysts at Bank of America argue that greater pricing power helps explain why American equities have a higher price-earnings ratio than European ones.

Some economists wonder if workers will before long demand even higher wages to compensate for higher shop prices.

The COVID vaccines are, without exaggeration, among the safest and most effective therapies in all of modern medicine. An unvaccinated adult is an astonishing 68 times more likely to die from COVID than a boosted one

Yet widespread vaccine hesitancy in the United States has caused more than 163,000 preventable deaths and counting

Even in absolute numbers, America’s unvaccinated and current-smoker populations seem to match up rather well: Right now, the CDC pegs them at 13 percent and 14 percent of all U.S. adults, respectively, and both groups are likely to be poorer and less educated.

Countries such as Denmark and Sweden have already declared themselves broken up with COVID. They are confidently doing so not because the virus is no longer circulating or because they’ve achieved mythical herd immunity from natural infection; they’ve simply inoculated enough people.

data suggest that most of the unvaccinated hold that status voluntarily at this point

The same arguments apply to tobacco: Smokers are 15 to 30 times more likely to develop lung cancer. Quitting the habit is akin to receiving a staggeringly powerful medicine, one that wipes out most of this excess risk.

If everyone who is eligible were triply vaccinated, our health-care system would be functioning normally again.

With a vaccination timeline that stretches over years, our patience for restrictions, especially on the already vaccinated, will be very limited. But there is middle ground. We haven’t banned tobacco outright—in fact, most states protect smokers from job discrimination—but we have embarked on a permanent, society-wide campaign of disincentivizing its use.

We should neither expect that every stubbornly unvaccinated person will get jabbed before next winter nor despair that none of them will ever change their mind. Let’s accept instead that we may make headway slowly, and with considerable effort

Long-term actions for COVID might include charging the unvaccinated a premium on their health insurance, just as we do for smokers, or distributing frightening health warnings about the perils of remaining uninoculated

And once the political furor dies down, COVID shots will probably be added to the lists of required vaccinations for many more schools and workplaces.

nother aspect of where we’re headed with COVID. Tobacco is lethal enough that we are willing to restrict smokers’ personal freedoms—but only to a degree. As deadly as COVID is, some people won’t get vaccinated, no matter what, and both the vaccinated and unvaccinated will spread disease to others.

anti-COVID actions, much like anti-smoking policies, will be limited not by their effectiveness but by the degree to which they are politically palatable.

Without greater vaccination, living with COVID could mean enduring a yearly death toll that is an order of magnitude higher than the one from flu.

this, too, might come to feel like its own sort of ending. Endemic tobacco use causes hundreds of thousands of casualties, year after year after year, while fierce public-health efforts to reduce its toll continue in the background. Yet tobacco doesn’t really feel like a catastrophe for the average person.

Losing a year or two from average life expectancy only bumps us back to where we were in … 2000.

We still care for smokers when they get sick, of course, and we reduce harm whenever possible. The health-care system makes $225 billion every year for doing so—paid out of all of our tax dollars and insurance premiums

Hospitals have a well-honed talent for transforming any terrible situation into a marketable “center of excellence.”

But we shouldn’t forget the most important reason that the coronavirus isn’t like the flu: We’ve never had vaccines this effective in the midst of prior influenza outbreaks, which means we didn’t have a simple, clear approach to saving quite so many lives. Compassionate conversations, community outreach, insurance surcharges, even mandates—I’ll take them all. Now is not the time to quit.

The two argued that democracy “can be realized in multiple ways” and isn’t the prerogative of any one country or group of countries. It called China “a whole-process, socialist democracy” and said democracy was the fundamental principle of Russia’s “democratic federative law-governed state.”

The Feb. 4 joint statement said both countries “have profound democratic traditions rooted in a thousand years of development,

It was Beijing that suggested including that the two countries’ friendship has “no limits”—wording read with apprehension in the West—according to the officials and advisers. The intention was less a declaration China would stand by Russia in case of war than a strong message to the U.S. about the resolve the two have in confronting what they see as increased American threats, the people said.

“China’s eagerness to present a strong alignment with Russia to counter the U.S. caused it to miss all the signs and to go in a dangerous direction,” said Yun Sun, director of the China program at the Stimson Center, a Washington think tank focused on promoting peace and security.

“It’s undeniable that right now, China is occupying an awkward nexus in which they’re trying to sustain their deep and fundamental relationship with Russia,”

“We believe they chose not to weigh in in advance.”

Beijing has refrained from coming to Moscow’s aid in a significant way. China is taking steps to buy Russian farm and energy products. But it is complying with the more damaging financial sanctions the U.S. has imposed on Russia, for fear of losing access to the dollar-dominated global trading system, say some Chinese bankers. They say their default position is to comply with the sanctions unless higher-ups tell them otherwise.

China’s ambiguous stance on the Russia-Ukraine war will likely speed up moves by countries from the U.K. and Australia to Japan to guard against Beijing,

a planned summit between China and the EU for April, if it isn’t canceled, is now likely to be dominated by discussions of China’s position on Ukraine.

Beijing’s most difficult contortions are on territorial sovereignty. China has built its foreign policy around the principle that a country’s territory is inviolable and its internal affairs should be free from interference by others.

China’s commitment to that principle seemingly would force it to condemn Russia’s invasion of Ukraine, something it has refrained from doing. Its policy statements have called for dialogue to resolve the crisis, avoiding the word invasion. Meanwhile, Western officials worry that Russia’s actions based on the argument that Ukraine is historically a part of Russia could embolden China to step up its own long-stated goal to bring Taiwan into its fold.

Since rising to power in late 2012, Mr. Xi has made himself the dominant force in China’s foreign policy and put emphasis on what he calls “big-power diplomacy”—a marked change from the relatively unassuming foreign-policy agendas of previous Chinese leaders that featured compromise and focused on building up ties with the U.S.

Today, despite Chinese state media’s pro-Russia rhetoric, some advisers privately question whether the partnership could cut China off from Western technologies and other resources and hurt its development, according to the foreign-policy advisers. After all, they have noted in private discussions, it is China’s opening to the U.S. and its allies that has propelled enormous Chinese growth in the past four decades.

China and Russia’s shared interest in confronting the U.S. has helped drive their relationship to its closest point since early in the Cold War. Part of that is due to the personal ties between Messrs. Xi and Putin, authoritarians who have visions of restoring their countries to past glory, even if in China’s case that past was centuries ago.

Sergey Radchenko, an international-relations professor at Johns Hopkins School of Advanced International Studies, pointed to instances where Mr. Putin would be deliberately late for meetings with foreign dignitaries. On one occasion, he brought out his dog to a meeting with then-German Chancellor Angela Merkel who, Mr. Putin knew, was terrified of dogs.

“He would never let himself do anything like that to Xi,” Mr. Radchenko said. “He’s extremely respectful to Xi because he sees a close relationship with China as one of Russia’s most valuable political assets.”

The implications for China extend beyond Ukraine, and even Europe.

“He’s damned if he did know, and damned if he didn’t,” Paul Haenle, a former director for China on the National Security Council, said of whether Mr. Xi had been aware of Russia’s plans to invade. “If he did know and he didn’t tell people, he’s complicit; if he wasn’t told by Putin, it’s an affront.”

In any case, the invasion evidently surprised many in Beijing’s establishment

Mr. Xi’s statement with Mr. Putin on Feb. 4 endorsed a Russian security proposal that would exclude Ukraine from joining the North Atlantic Treaty Organization.

Even so, as Mr. Putin became determined to reverse Ukraine’s turn to Western security protections, Chinese officials began to echo Russian arguments. Beijing also saw a growing threat from American-led military blocs.

“Putin may have done this anyway, but also it was unquestionably an enabling backdrop that was provided by the joint statement, the visit and Xi’s association with all of these things,”

“He owns that relationship with Putin,” Mr. Haenle said. “If you’re suggesting in the Chinese system right now that it was not smart to get that close to Russia, you’re in effect criticizing the leader.”

For decades it sought to build ties with Russia while also keeping Ukraine close.

Over the past years, as growing numbers of Ukrainians supported joining NATO, Chinese diplomats did not raise objections with Kyiv, said Sergiy Gerasymchuk, an analyst with Ukrainian Prism, a foreign policy research organization in Kyiv.

For both leaders, their partnership was an answer to Mr. Biden’s effort to forge an “alliance of democracies.”

Before and shortly after the invasion, Beijing sounded sympathetic to Moscow’s security demands, mocking Western warnings of war and accusing the United States of goading Russia. Over the past two weeks, though, China has sought to edge slightly away from Russia. It has softened its tone, expressing grief over civilian casualties. It has cast itself as an impartial party, calling for peace talks and for the war to stop as soon as possible.

Beijing had its own complaints with NATO, rooted in the bombing of the Chinese Embassy in Belgrade, Serbia, during NATO’s war in 1999 to protect a breakaway region, Kosovo. Those suspicions deepened when NATO in 2021 began to describe China as an emerging challenge to the alliance.

n Feb. 23, a foreign ministry spokeswoman, Hua Chunying, accused Washington of “manufacturing panic.”

Chinese officials tweaked their calls to heed Russia’s security, stressing that “any country’s legitimate security concerns should be respected.” They still did not use the word “invasion,” but have acknowledged a “conflict between Ukraine and Russia.”

“Many decision makers in China began to perceive relations in black and white: either you are a Chinese ally or an American one,”

“They still want to remain sort of neutral, but they bitterly failed.”

While sex is a category that refers broadly to physiology, a person's gender is an innate sense of identity. The factors that go into determining the sex listed on a birth certificate may include anatomy, genetics and hormones, and there is broad natural variation in each of these categories. For this reason, critics have said the language of "biological sex," as used in DeSantis' proclamation, is overly simplistic and misleading.A 2017 report in the journal Sports Medicine that reviewed several related studies found "no direct or consistent research" on trans people having an athletic advantage over their cisgender peers, at any state of their transition, and critics say postures like DeSantis' will only add to the discrimination that trans people face, particularly trans youth.

So far this year, Iowa and South Dakota have approved legislation banning transgender women and girls from participating on sports teams consistent with their gender at accredited schools and colleges. And last year, Alabama, Arkansas, Florida, Mississippi, Montana, Tennessee, Texas and West Virginia enacted similar sports bans, infuriating LGBTQ advocates, who argue conservatives are creating an issue where there isn't one.

"This package is also focused on protecting people from volatile gas prices, and advancing clean transportation," Newsom said.Rebates like the ones Newsom is proposing take time to deliver, with the governor's office saying people could see the money by July.Rising fuel prices are a tricky policy issue for Newsom, who is trying to wean the state off fossil fuels. He has signed executive orders aimed at banning the sale of new gas-powered cars in the state by 2035 and halting all oil extraction by 2045.He has proposed a total of $10 billion in funding over six years to boost zero-emission vehicle production and build charging stations.

Newsom's plan must be approved by the Legislature, where Democrats dominate both the Assembly and the Senate. Democratic leaders, however, don't like the idea of giving money to rich people.They have been discussing their own rebate proposal, one that would give $200 rebates to every taxpayer and their children with taxable income less than $125,000 for single filers and $250,000 for joint filers. That means a family of five would get $1,000 while a single parent with two children would get $600.

A spokesperson for Democratic Assembly Speaker Anthony Rendon called Newsom's idea "consistent with the Speaker's goal of providing targeted financial relief to Californians most in need" but stressed the idea is "in the very early stages."Newsom's plan is similar to a separate proposal floated last week by more moderate Democrats in the state Assembly that would give every taxpayer $400, regardless of income.

"People need relief now," said Assembly Republican Leader James Gallagher. "We've got now, like, four different competing plans amongst the Democrats. These guys are going to negotiate against themselves for weeks to months and who knows what we're going to get."

“He was asked what he thought. He said they are very good people on both sides. And that’s when I decided I wasn’t going to be quiet any longer,” Biden said of Trump’s response to the violence in Charlottesville. The president, eschewing the historical norm of avoiding domestic political commentary while traveling abroad, proceeded to claim that even US news outlets that oppose him know of his commitment to do “the right thing.”

The president added, “The first G7 meeting I attended, like the one I did today, was in Great Britain. And I sat down and I said, ‘America’s back.’ And one of my counterparts, colleagues, who is a head of state, said, ‘For how long? For how long?’ And so I don’t blame, I don’t criticize anybody for asking that question.”

Leaders in the deeply conservative Utah say they need the law to protect women's sports. As cultural shifts raise LGBTQ visibility, the lawmakers argue that, without their intervention, more transgender athletes with apparent physical advantages could eventually dominate the field and change the nature of women's sports.

he team is also partially owned by NBA all-star Dwyane Wade, who has a transgender daughter.

The looming threat of a lawsuit worries school districts and the Utah High School Athletic Association, which has said it lacks the funds to defend the policy in court. Later Friday, lawmakers are expected to change the bill so state money would cover legal fees.

The group Visit Salt Lake, which hosts conferences, shows and events, said the override could cost the state $50 million in lost revenue. The Utah-based DNA-testing genealogy giant Ancestry.com also urged the Legislature to find another way. The American Principles Project is confident that states with bans won't face boycotts like North Carolina did after limiting public restrooms transgender people could use. It focused on legislation in populous, economic juggernaut states like Texas and Florida that would be harder to boycott, Schilling said.

Friday's deliberations came after more than a year of debate and negotiation between social conservatives and LGBTQ advocates. Republican sponsor Rep. Kera Birkeland worked with Cox and civil rights activists at Equality Utah before introducing legislation that would require transgender student-athletes to go before a government-appointed commission.

The proposal, although framed as a compromise, failed to gain traction on either side. LGBTQ advocates took issue with Republican politicians appointing commission members and evaluation criteria that included body measurements such as hip-to-knee ratio.

But the ban won support from a vocal conservative base that has particular sway in Utah's state primary season. Even with primaries looming, however, some Republicans stood with Cox to reject the ban.

Ready for more bad infectious diseases news? There's an outbreak of bird flu making its way into U.S. poultry flocks. If the virus continues to spread, it could affect poultry prices — already higher amid widespread inflation. The price of chicken breasts this week averaged $3.63 per pound at U.S. supermarkets — up from $3.01 a week earlier and $2.42 at this time last year, the Agriculture Department says.

The latest data from the USDA show 59 confirmed sites of avian flu across commercial and backyard flocks in 17 states since the start of the year. That figure includes chickens, turkey and other poultry. The USDA identified a case of avian flu in a wild bird in mid-January, the first detection of the virus in wild birds in the U.S. since 2016. Wild birds can spread the virus to commercial and backyard flocks. By Feb. 9, the virus had been identified in a commercial flock in Indiana.

The last major avian flu outbreak in the U.S. was from December 2014 to June 2015, when more than 50 million chickens and turkeys either died from highly pathogenic avian influenza (HPAI) or were destroyed to stop its spread.

Whether the 2022 avian flu will affect the price of eggs and poultry depends on how widespread it becomes, says Ron Kean, a poultry science expert at the University of Wisconsin-Madison Department of Animal and Dairy Sciences. "In 2015, we did see quite an increase in egg prices," Kean told Wisconsin Public Radio. "The chicken meat wasn't severely affected at that time. We did see quite a loss in turkeys, so turkey prices went up. So, we'll see. If a lot of farms contract this, then we could see some real increases in price."

For producers who suspect their flock may be affected by avian flu, the USDA has a guide to the warning signs, including a sudden increase in bird deaths, lack of energy and appetite, and a decrease in egg production. If a flock is found to be infected by bird flu, the USDA moves quickly — within 24 hours — to assist producers to destroy the flock and prevent the virus from spreading.

A new Virginia state law prohibiting mask mandates in public schools does not apply to 12 students with disabilities whose parents challenged the law, a federal judge has ruled. Last month, the parents of 12 students across Virginia asked the court to halt enforcement of the law, saying it violated their rights under the federal American with Disabilities Act. The law, signed by newly elected Republican Gov. Glenn Youngkin, went into effect March 1; it gives parents a say over whether their children should wear masks in school.

The group of parents have children whose health conditions range from cystic fibrosis to asthma that put them at heightened risk for COVID-19.

The American Civil Liberties Union, which was one of several legal organizations that filed on behalf of the plaintiffs, said the injunction served as a "blueprint."

In a statement, Virginia Attorney General Jason Miyares said the ruling affirms that "parents have the right to make choices for their children."

When Judge Katanji Brown Jackson entered the Senate chamber this week to face questions on her readiness to join the Supreme Court, she did so as the first Black woman in the nation's history to be nominated to that position. For many Black law students and professionals, including a group of 150 who traveled from across the country to watch the historic hearing, Jackson's rise to likely associate justice gives a message of profound hope for what they too might one day be able to accomplish.

Dudley was one of 100 law students selected nationwide to attend a series of events and watch parties for Jackson's nomination, hosted by the progressive organization, Demand Justice. The group also included 50 public defenders — a nod to Jackson's own background in that field. "I see a lot of myself in her. I see a lot of my friends in her, and I wanted to be there to support," Dudley said, calling Jackson "overly qualified to sit on the Supreme Court."

The cohort of legal professionals cheered on Jackson as she faced questions from Republicans about her past cases, particularly those relating to child sex abuse, and on what school of thought she would bring to determining the constitutionality of high-profile cases. Republicans had vowed to oppose President Joe Biden's nominees to the court, and when news of Justice Stephen Breyer's imminent retirement broke, the GOP quickly mobilized to attack potential nominees who might replace the longtime liberal justice on the bench.

Particularly, some sentencing decisions in child pornography cases drew GOP fire. But Jackson's measured responses throughout the three days of questioning solidified the support of many onlookers, who reveled in what it would mean to have a Black woman sit on the bench for the first time in the court's 233-year history. "The fact of the matter is that I'm the father of three black girls, right? And to be able to tell them that finally, someone who is Black — female nonetheless — is finally on the precipice of a mountain that has never been climbed before by any other Black woman, is huge," said Edrius Stagg, a third-year law student at Southern University Law Center in Baton Rouge.

Sen. Joe Manchin of West Virginia — whose break from Democrats on a number of politically fraught votes had worried some as to whether he would support Biden's nominee — announced on Friday he would vote in favor of Jackson's confirmation, all but assuring her path to join the bench.

For some, the optics of seeing Jackson — a Black woman — defend her credentials to a group of largely white, predominantly male detractors, was a familiar scene. It has played out, students said, in workplaces the world over and across the socioeconomic spectrum.

Booker called the attacks on Jackson's record "dangerous" and "disingenuous," noting the complexities of cases that had been boiled down to their basest points in order to damage Jackson's image.

"I'm not gonna let my joy be stolen," he continued. "Because I know, you and I, we appreciate something that we get that a lot of my colleagues don't." And while Jackson's opponents peppered her with politically polarizing questions, her supporters grew even more convinced that Jackson was qualified for the job. "To see her hold her composure and just answer the questions just to the best of her capabilities was just really great to see," said Jasmine McMillion, a third-year law student at Florida Agricultural and Mechanical University College of Law.

grants membership only by unanimous consent.

Mr. Putin is trying to distract from more urgent matters.

Mr. Biden successfully urged NATO to accept Poland, Hungary and the Czech Republic as member states in the late 1990s. The top Democrat on the Senate Foreign Relations Committee at the time, Mr. Biden said that turning the former Cold War adversaries into allies would mark the “beginning of another 50 years of peace” for Europe.

we support Ukraine membership in NATO.

Officials in European nations with stronger liberal governance — notably in Sweden and Finland — have also floated the possibility of joining NATO

After annexing Crimea, Mr. Putin invaded eastern Ukraine and gave military aid to a separatist insurgency there. He did something similar in Georgia in 2008.

Mr. Biden blew past those comments without responding.

Putin’s behavior shocked many people because they bought into his image as a grand master of intricate policy maneuvers, which assumes intentionality, adroitness, and cunning. A more accurate judgment followed from saying to oneself: This is an aging dictator, who after 20 years of absolute power gets no pushback; who is paranoid, dismissive, and brutal

, he is someone who has deteriorated both physically and—as seen in his delivery of rambling, querulous speeches—mentally.

The personality of the Ukrainian president has made all the difference. Volodymyr Zelensky is an Everyman hero: reluctant, initially unsure, but patriotic and courageous.

A second explanation is narrower. It has to do with military analysts’ focus on technology at the expense of the human element in war.

War is a contest of wills; it is unpredictable; it is the domain of accident and contingency; nothing goes as planned; and events are smothered in a fog created by misinformation and fear.

less international-relations theory and more Carl von Clausewitz would have helped

Finally, the democratic pessimism of the past two decades has obscured from many the extraordinary power of freedom, and the innate resilience of liberal-democratic countries and institutions.

A culture of lies is corrosive, breeding cynicism and eventually self-doubt. Truth is not only more powerful but open to all of us, hence Václav Havel’s dictum that the way to resist tyranny is to live in truth.

the Telluride workshops were being organized by two college-age students, filled with the spirit of the times

From what I gleaned, they involved crudely conveying certain dogmatic assertions, no matter what topic the workshops were ostensibly about:Experiencing hardship conveys authority. There is no hierarchy of oppressions—except for anti-black oppression, which is in a class of its own. Trust black women.Prison is never the answer.Black people need black space.Allyship is usually performative.All non-black people, and many black people, are guilty of anti-blackness.There is no way out of anti-blackness.

It is tempting to add: Such is life. Such is democratic life. We each have different, partial knowledge. We each get things wrong, over and over. At our best, we enter the fray by listening to each other and complementing and challenging the insights of our fellows. In the process, over years, decades, we are oriented toward justice and truth.

Specific words, phrases, arguments, and images from a text offer essential friction for conversation, holding seminar participants accountable to something concrete.

The seminar assumes that each student has innate intelligence, even as we come from different backgrounds, have different amounts and sorts of knowledge, and different skills. We can each be formed best if we take advantage of our differing insights to push each other, over time, again and again. When this practice is occasioned by carefully curated texts—not exclusively “great books,” but texts that challenge each other and us as they probe issues of essential importance—a seminar succeeds.

Each intervention in a seminar is incomplete, and gets things wrong. Each subsequent intervention is also incomplete, and also gets things wrong. But there are plenty of insights and surprises, for each participant looks at a text with different eyes

By its nature, a seminar requires patience. Day by day, one intervention builds on another, as one student notices what another student overlooked, and as the professor guides the discussion toward the most important questions

The effects on the seminar were quick and dramatic. During the first week, participation was as you would expect: There were two or three shy students who only spoke in partner or small-group work, two or three outspoken students, and the rest in the middle. One of the black students was outspoken, one was in the middle, and one was shy. By the second week of the seminar, the two white students were effectively silent. Two of the Asian-American students remained active (the ones who would soon be expelled), but the vast majority of interventions were from the three black students. The two queer students, one Asian and one white, were entirely silent

“Two of the Asian-American students would be expelled from the program.”In the 2022 anti-racism workshops, the non-black students learned that they needed to center black voices—and to shut up.

If the seminar is slow food, the anti-racist workshop put on by college-age students is a sugar rush. All the hashtags are there, condensed, packaged, and delivered from a place of authority. The worst sort of anti-racist workshop simply offers a new language for participants to echo—to retweet out loud.

In their “transformative-justice” workshop, my students learned to name “harms.”

In the language of the anti-racism workshop, a harm becomes anything that makes you feel not quite right. For a 17-year-old at a highly selective, all-expenses-paid summer program, newly empowered with the language of harm, there are relatively few sites at which to use this framework. My seminar became the site at which to try out—and weaponize—this language.

John McWhorter asserts that anti-racism is a new religion. It was an idea I quickly dismissed. Last summer, I found anti-racism to be a perversion of religion: I found a cult

the features of cults have become familiar in popular culture. There is sleep deprivation. Ties to the outside world are severed. The sense of time collapses, with everything cult-related feeling extremely urgent. Participants are emotionally battered. In this weakened state, participants learn about and cling to dogmatic beliefs. Any outsider becomes a threat.

The feature of a cult that seems to be missing from this story is a charismatic leader, enforcing the separation of followers from the world, creating emotional vulnerability, and implanting dogma. Enter Keisha

Pushing anti-racism to its limits, what we reach isn’t just hollow doctrine, but abuse: Pathological relationships that cut us off from the world, from the give-and-take of reasons and feelings unfolding over time that makes up life in the world.

We see this crystal clear in the paradoxes that I encountered

The experience was supposed to be organized around a “transformative justice,” rather than a punitive model, yet the community managed to expel two of its members.

Students continually voiced their desire to find practical actions to help change the world, but after four weeks, they had learned to say that anti-blackness is so foundational, the world could never change

The students wanted freedom, for themselves and for all, but they started to say that the only route to freedom is indoctrination: having me tell them what to think.

Saddest of all, for me, was hearing what the black students said. They needed extra help, they were struggling to understand anything from the readings, and they couldn’t even know what questions to ask unless they had guidance—first Keisha said this, then the black students said it, then their “allies” repeated it in solidarity with them

“No one believed me that working for Elon was the way it was until they saw how he operated Twitter,” Bernal said, calling Twitter “just the tip of the iceberg on how he operates Tesla.”

In April 2019, at a showcase dubbed “Autonomy Investor Day,” Musk made perhaps his boldest prediction as Tesla’s chief executive. “By the middle of next year, we’ll have over a million Tesla cars on the road with full self-driving hardware,” Musk told a roomful of investors. The software updates automatically over the air, and Full Self-Driving would be so reliable, he said, the driver “could go to sleep.”

Investors were sold. The following year, Tesla’s stock price soared, making it the most valuable automaker and helping Musk become the world’s richest person

To deliver on his promise, Musk assembled a star team of engineers willing to work long hours and problem solve deep into the night. Musk would test the latest software on his own car, then he and other executives would compile “fix-it” requests for their engineers.

Those patchwork fixes gave the illusion of relentless progress but masked the lack of a coherent development strategy, former employees said. While competitors such as Alphabet-owned Waymo adopted strict testing protocols that limited where self-driving software could operate, Tesla eventually pushed Full Self-Driving out to 360,000 owners — who paid up to $15,000 to be eligible for the features — and let them activate it at their own discretion.

Tesla’s philosophy is simple: The more data (in this case driving) the artificial intelligence guiding the car is exposed to, the faster it learns. But that crude model also means there is a lighter safety net. Tesla has chosen to effectively allow the software to learn on its own, developing sensibilities akin to a brain via technology dubbed “neural nets” with fewer rules, the former employees said. While this has the potential to speed the process, it boils down to essentially a trial and error method of training.

Radar originally played a major role in the design of the Tesla vehicles and software, supplementing the cameras by offering a reality check of what was around, particularly if vision might be obscured. Tesla also used ultrasonic sensors, shorter-range devices that detect obstructions within inches of the car. (The company announced last year it was eliminating those as well.)

Even with radar, Teslas were less sophisticated than the lidar and radar-equipped cars of competitors.“One of the key advantages of lidar is that it will never fail to see a train or truck, even if it doesn’t know what it is,” said Brad Templeton, a longtime self-driving car developer and consultant who worked on Google’s self-driving car. “It knows there is an object in front and the vehicle can stop without knowing more than that.”

Toward the end of 2020, Autopilot employees turned on their computers to find in-house workplace monitoring software installed, former employees said. It monitored keystrokes and mouse clicks, and kept track of their image labeling. If the mouse did not move for a period of time, a timer started — and employees could be reprimanded, up to being fired, for periods of inactivity, the former employees said.

Some of the people who spoke with The Post said that approach has introduced risks. “I just knew that putting that software out in the streets would not be safe,” said a former Tesla Autopilot engineer who spoke on the condition of anonymity for fear of retaliation. “You can’t predict what the car’s going to do.”

Some of the people who spoke with The Post attributed Tesla’s sudden uptick in “phantom braking” reports — where the cars aggressively slow down from high speeds — to the lack of radar. The Post analyzed data from the National Highway Traffic Safety Administration to show incidences surged last year, prompting a federal regulatory investigation.

The data showed reports of “phantom braking” rose to 107 complaints over three months, compared to only 34 in the preceding 22 months. After The Post highlighted the problem in a news report, NHTSA received about 250 complaints of the issue in a two-week period. The agency opened an investigation after, it said, it received 354 complaints of the problem spanning a period of nine months.

“It’s not the sole reason they’re having [trouble] but it’s big a part of it,” said Missy Cummings, a former senior safety adviser for NHTSA, who has criticized the company’s approach and recused herself on matters related to Tesla. “The radar helped detect objects in the forward field. [For] computer vision which is rife with errors, it serves as a sensor fusion way to check if there is a problem.”

Musk, as the chief tester, also asked for frequent bug fixes to the software, requiring engineers to go in and adjust code. “Nobody comes up with a good idea while being chased by a tiger,” a former senior executive recalled an engineer on the project telling him

Musk’s resistance to suggestions led to a culture of deference, former employees said. Tesla fired employees who pushed back on his approach. The company was also pushing out so many updates to its software that in late 2021, NHTSA publicly admonished Tesla for issuing fixes without a formal recall notice.

Tesla engineers have been burning out, quitting and looking for opportunities elsewhere. Andrej Karpathy, Tesla’s director of artificial intelligence, took a months-long sabbatical last year before leaving Tesla and taking a position this year at OpenAI, the company behind language-modeling software ChatGPT.

One of the former employees said that he left for Waymo. “They weren’t really wondering if their car’s going to run the stop sign,” the engineer said. “They’re just focusing on making the whole thing achievable in the long term, as opposed to hurrying it up.”

they gave many explanations, but one of the most compelling—and depressing—is rooted in how our education system teaches kids to relate to books.

where I was in public elementary school in the early ’80s, we did have state assessments that tested reading level and comprehension, but the focus was on reading as many books as possible and engaging emotionally with them as a way to develop the requisite skills.

the focus on reading analytically seems to be squashing that organic enjoyment

By middle school, not only is there even less time for activities such as class read-alouds, but instruction also continues to center heavily on passage analysis

here’s how one educator experienced in writing Common Core–aligned curricula proposes this be taught: First, teachers introduce the concepts of nonliteral and figurative language. Then, kids read a single paragraph from Amelia Bedelia and answer written questions.

this hyperfocus on analysis comes at a steep price: The love of books and storytelling is being lost.

the advent of accountability laws and policies, starting with No Child Left Behind in 2001, and accompanying high-stakes assessments based on standards, be they Common Core or similar state alternatives, has put enormous pressure on instructors to teach to these tests at the expense of best practices.

“There’s a whole generation of kids who associate reading with assessment now,”

Jumping into a paragraph in the middle of a book is about as appealing for most kids as cleaning their room.

the idea that reading all kinds of books is enjoyable is not the one kids seem to be receiving.

Longer books, for example, are considered less “fun”; in addition, some librarians, teachers, and parents are noticing a decline in kids’ reading stamina after the disruption of the pandemic.

we need to get to the root of the problem, which is not about book lengths but the larger educational system. We can’t let tests control how teachers teach: Close reading may be easy to measure, but it’s not the way to get kids to fall in love with storytelling

Teachers need to be given the freedom to teach in developmentally appropriate ways, using books they know will excite and challenge kids.

Kids should be required to read more books, and instead of just analyzing passages, they should be encouraged to engage with these books the way they connect with “fun” series, video games, and TV shows.

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.

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

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

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.

“AI is the next revolution and there is no going back,”

that transformation is already taking shape, and workers can find ways to use the ChatGPT and other new technology to free them from boring work.

“Every month there are hundreds more job postings mentioning generative AI,”

“The way things have been done in the past aren’t necessarily the way they need to be done today,” he said, adding that workers and employers should invest in retraining and upskilling where possible.

“There is an enormous demand for people who are tech-savvy and who will be the first adopters, who will be the first to figure out what opportunities these technologies open up,”

The jobs of the future will require a mind-set shift for employees, several executives said. Rather than viewing generative AI and other machine-learning software as a threat, workers should embrace new technology as a way to free them from less-rewarding work and augment their strengths.

“This is a huge opportunity to advance a lot of professions—allow people to do work that’s, frankly, more stimulating.”

For the hotel chain, that could look like using AI to determine which brand of wine a guest likes, and adjusting recommendations accordingly.

United Airlines Holdings Inc., aims to use AI to do transactions that shouldn’t require a human, such as placing someone in an aisle or window seat depending on their preference, or suggesting a different flight for someone trying to book a tight connection, said Kate Gebo, executive vice president of human resources and labor relations. That leaves employees free to have more complex interactions with customers

services intended to help customers solve emotional problems require solutions a machine can’t provide.

“AI is not sentient. It can’t be emotional. And that is the kind of accountability and reciprocity that is needed…for people to have the outcomes that we’re hoping to provide,”

“Certain business processes could be enhanced,” said Carmen Orr, Yelp’s chief people officer, adding that there are plenty of concerns, too. “We don’t want it for high human-touch things.”

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.”

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

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.

“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.”