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An icon of the Industrial Revolution broke onto the scene in the early 1700s, when Thomas Newcomen designed the prototype for the first modern steam engine. Called the “atmospheric steam engine,” Newcomen’s invention was originally applied to power the machines used to pump water out of mine shafts. 

Just as steam engines needed coal, steam power allowed miners to go deeper and extract more of this relatively cheap energy source. The demand for coal skyrocketed throughout the Industrial Revolution and beyond, as it would be needed to run not only the factories used to produce manufactured goods, but also the railroads and steamships used for transporting them.

In the early 1800s, Richard Trevithick debuted a steam-powered locomotive, and in 1830 similar locomotives started transporting freight (and passengers) between the industrial hubs of Manchester and Liverpool. By that time, steam-powered boats and ships were already in wide use, carrying goods along Britain’s rivers and canals as well as across the Atlantic.

The latter part of the Industrial Revolution also saw key advances in communication methods, as people increasingly saw the need to communicate efficiently over long distances. In 1837, British inventors William Cooke and Charles Wheatstone patented the first commercial telegraphy system, even as Samuel Morse and other inventors worked on their own versions in the United States. Cooke and Wheatstone’s system would be used for railroad signalling, as the speed of the new trains had created a need for more sophisticated means of communication.

Though many people in Britain had begun moving to the cities from rural areas before the Industrial Revolution, this process accelerated dramatically with industrialization, as the rise of large factories turned smaller towns into major cities over the span of decades. This rapid urbanization brought significant challenges, as overcrowded cities suffered from pollution, inadequate sanitation and a lack of clean drinking water.

The beginning of industrialization in the United States is usually pegged to the opening of a textile mill in Pawtucket, Rhode Island, in 1793 by the recent English immigrant Samuel Slater. Slater had worked at one of the mills opened by Richard Arkwright (inventor of the water frame) mills, and despite laws prohibiting the emigration of textile workers, he brought Arkwright’s designs across the Atlantic. He later built several other cotton mills in New England, and became known as the “Father of the American Industrial Revolution.”

By the end of the 19th century, with the so-called Second Industrial Revolution underway, the United States would also transition from a largely agrarian society to an increasingly urbanized one, with all the attendant problems. By the mid-19th century, industrialization was well-established throughout the western part of Europe and America’s northeastern region. By the early 20th century, the U.S. had become the world’s leading industrial nation.

About all this there is no essential disagreement. The most hideous enemy of native Americans was not the white man and his weaponry, concludes Alfred Crosby,"but the invisible killers which those men brought in their blood and breath." It is thought that between 75 to 90 percent of all Indian deaths resulted from these killers.

As an example of actual genocidal conditions, Stannard points to Franciscan missions in California as"furnaces of death."

The missionaries had a poor understanding of the causes of the diseases that afflicted their charges, and medically there was little they could do for them. By contrast, the Nazis knew exactly what was happening in the ghettos, and quite deliberately deprived the inmates of both food and medicine; unlike in Stannard’s"furnaces of death," the deaths that occurred there were meant to occur.

True, too, some colonists later welcomed the high mortality among Indians, seeing it as a sign of divine providence; that, however, does not alter the basic fact that Europeans did not come to the New World in order to infect the natives with deadly diseases.

But Chardon's journal manifestly does not suggest that the U.S. Army distributed infected blankets, instead blaming the epidemic on the inadvertent spread of disease by a ship's passenger. And as for the"100,000 fatalities," not only does Thornton fail to allege such obviously absurd numbers, but he too points to infected passengers on the steamboat St. Peter's as the cause. Another scholar, drawing on newly discovered source material, has also refuted the idea of a conspiracy to harm the Indians.

Similarly at odds with any such idea is the effort of the United States government at this time to vaccinate the native population. Smallpox vaccination, a procedure developed by the English country doctor Edward Jenner in 1796, was first ordered in 1801 by President Jefferson; the program continued in force for three decades, though its implementation was slowed both by the resistance of the Indians, who suspected a trick, and by lack of interest on the part of some officials. Still, as Thornton writes:"Vaccination of American Indians did eventually succeed in reducing mortality from smallpox."

The disparity in estimates is enormous. In 1928, the ethnologist James Mooney proposed a total count of 1,152,950 Indians in all tribal areas north of Mexico at the time of the European arrival. By 1987, in American Indian Holocaust and Survival, Russell Thornton was giving a figure of well over 5 million, nearly five times as high as Mooney’s, while Lenore Stiffarm and Phil Lane, Jr. suggested a total of 12 million. That figure rested in turn on the work of the anthropologist Henry Dobyns, who in 1983 had estimated the aboriginal population of North America as a whole at 18 million and of the present territory of the United States at about 10 million.

Still, even if up to 90 percent of the reduction in Indian population was the result of disease, that leaves a sizable death toll caused by mistreatment and violence. Should some or all of these deaths be considered instances of genocide?

Despite the colonists' own resort to torture in order to extract confessions, the cruelty of these practices strengthened the belief that the natives were savages who deserved no quarter

A second famous example from the colonial period is King Philip’s War (1675-76).

The war was also merciless, on both sides. At its outset, a colonial council in Boston had declared"that none be Killed or Wounded that are Willing to surrender themselves into Custody."

But these rules were soon abandoned on the grounds that the Indians themselves, failing to adhere either to the laws of war or to the law of nature, would"skulk" behind trees, rocks, and bushes rather than appear openly to do" civilized" battle. Similarly creating a desire for retribution were the cruelties perpetrated by Indians when ambushing English troops or overrunning strongholds housing women and children.

Before long, both colonists and Indians were dismembering corpses and displaying body parts and heads on poles. (Nevertheless, Indians could not be killed with impunity. In the summer of 1676, four men were tried in Boston for the brutal murder of three squaws and three Indian children; all were found guilty and two were executed.)

In 1704, this was amended in the direction of"Christian practice" by means of a scale of rewards graduated by age and sex; bounty was proscribed in the case of children under the age of ten, subsequently raised to twelve (sixteen in Connecticut, fifteen in New Jersey). Here, too, genocidal intent was far from evident; the practices were justified on grounds of self-preservation and revenge, and in reprisal for the extensive scalping carried out by Indians.

To force the natives into submission, Generals Sherman and Sheridan, who for two decades after the Civil War commanded the Indian-fighting army units on the Plains, applied the same strategy they had used so successfully in their marches across Georgia and in the Shenandoah Valley. Unable to defeat the Indians on the open prairie, they pursued them to their winter camps, where numbing cold and heavy snows limited their mobility. There they destroyed the lodges and stores of food, a tactic that inevitably resulted in the deaths of women and children.

As the United States expanded westward, such conflicts multiplied. So far had things progressed by 1784 that, according to one British traveler,"white Americans have the most rancorous antipathy to the whole race of Indians; and nothing is more common than to hear them talk of extirpating them totally from the face of the earth, men, women, and children."

To understand all is hardly to forgive all, but historical judgment, as the scholar Gordon Leff has correctly stressed,"must always be contextual: it is no more reprehensible for an age to have lacked our values than to have lacked forks."

According to Article II of the convention, the crime of genocide consists of a series of acts" committed with intent to destroy, in whole or in part, a national, ethnical, racial, or religious group as such" (emphases added). Practically all legal scholars accept the centrality of this clause.

During the deliberations over the convention, some argued for a clear specification of the reasons, or motives, for the destruction of a group. In the end, instead of a list of such motives, the issue was resolved by adding the words"as such"—i.e., the motive or reason for the destruction must be the ending of the group as a national, ethnic, racial, or religious entity. Evidence of such a motive, as one legal scholar put it,"will constitute an integral part of the proof of a genocidal plan, and therefore of genocidal intent."

The crucial role played by intentionality in the Genocide Convention means that under its terms the huge number of Indian deaths from epidemics cannot be considered genocide.

y contrast, some of the massacres in California, where both the perpetrators and their supporters openly acknowledged a desire to destroy the Indians as an ethnic entity, might indeed be regarded under the terms of the convention as exhibiting genocidal intent.

the convention does not address the question of what percentage of a group must be affected in order to qualify as genocide. As a benchmark, the prosecutor of the International Criminal Tribunal for the Former Yugoslavia has suggested"a reasonably significant number, relative to the total of the group as a whole," adding that the actual or attempted destruction should also relate to"the factual opportunity of the accused to destroy a group in a specific geographic area within the sphere of his control, and not in relation to the entire population of the group in a wider geographic sense."

If this principle were adopted, an atrocity like the Sand Creek massacre, limited to one group in a specific single locality, might also be considered an act of genocide.

Applying today’s standards to events of the past raises still other questions, legal and moral alike. While history has no statute of limitations, our legal system rejects the idea of retroactivity (ex post facto laws).

No doubt, the 19th-century idea of America’s"manifest destiny" was in part a rationalization for acquisitiveness, but the resulting dispossession of the Indians was as unstoppable as other great population movements of the past. The U.S. government could not have prevented the westward movement even if it had wanted to.

Morally, even if we accept the idea of universal principles transcending particular cultures and periods, we must exercise caution in condemning, say, the conduct of war during America’s colonial period, which for the most part conformed to thenprevailing notions of right and wrong.

The real task, then, is to ascertain the context of a specific situation and the options it presented. Given circumstances, and the moral standards of the day, did the people on whose conduct we are sitting in judgment have a choice to act differently?

Finally, even if some episodes can be considered genocidal—that is, tending toward genocide—they certainly do not justify condemning an entire society

Guilt is personal, and for good reason the Genocide Convention provides that only"persons" can be charged with the crime, probably even ruling out legal proceedings against governments.

noncombatants incidentally and accidentally, not purposefully." As for the larger society, even if some elements in the white population, mainly in the West, at times advocated extermination, no official of the U.S. government ever seriously proposed it. Genocide was never American policy, nor was it the result of policy.

The violent collision between whites and America's native population was probably unavoidable.

Genocide? These actions were almost certainly in conformity with the laws of war accepted at the time. The principles of limited war and of noncombatant immunity had been codified in Francis Lieber's General Order No. 100, issued for the Union Army on April 24, 1863. But the villages of warring Indians who refused to surrender were considered legitimate military objectives.

In the end, the sad fate of America's Indians represents not a crime but a tragedy, involving an irreconcilable collision of cultures and values.

efforts of well-meaning people in both camps, there existed no good solution to this clash. The Indians were not prepared to give up the nomadic life of the hunter for the sedentary life of the farmer. The new Americans, convinced of their cultural and racial superiority, were unwilling to grant the original inhabitants of the continent the vast preserve of land required by the Indians’ way of life.

To fling the charge of genocide at an entire society serves neither the interests of the Indians nor those of history.

In the bid to lock in new rules before Jan. 20, Mr. Trump’s team is limiting or sidestepping requirements for public comment on some of the changes and swatting aside critics who say the administration has failed to carry out sufficiently rigorous analysis.

Every administration pushes to complete as much of its agenda as possible when a president’s term is coming to an end, seeking not just to secure its own legacy but also to tie the hands of any successor who tries to undo its work.

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Two main hallmarks of a good regulation is sound analysis to support the alternatives chosen and extensive public comment to get broader opinion

Administration officials said they were simply completing work on issues they have targeted since Mr. Trump took office in 2017 promising to curtail the reach of federal regulation.

If Democrats take control of Congress, they will have the power to reconsider some of these last-minute regulations, through a law last used at the start of Mr. Trump’s tenure by Republicans to repeal certain rules enacted at the end of the Obama administration.

But the Trump administration is also working to fill key vacancies on scientific advisory boards with members who will hold their seats far into the next presidential term, committees that play an important role in shaping federal rule making

But it is nonetheless pushing to have the rule finished before the end of Mr. Trump’s first term, limiting the period of public comment to 30 days, half the amount of time that agencies are supposed to offer.

Workers across the country deserve a chance to fully examine and properly respond to these potentially radical changes,

The Departments of Labor and Homeland Security are using a tactic known as an interim final rule, more typically reserved for emergencies, to skip the public comment period entirely and to immediately enact two regulations that put much tougher restrictions on work visas for immigrants with special skills. The rule change is part of the administration’s longstanding goal of limiting immigration.

The Homeland Security Department is also moving, again with an unusually short 30-day comment period, to adopt a rule that will allow it to collect much more extensive biometric data from individuals applying for citizenship, including voice, iris and facial recognition scans, instead of just the traditional fingerprint scan.

A third proposed new Homeland Security rule would require sponsors of immigrants to do more to prove they have the financial means to support the individual they are backing, including three years’ worth of credit reports, credit scores, income tax returns and bank records.

Unlike most of the efforts the administration has pushed, the rules intended to tighten immigration standards would expand federal regulations, instead of narrowing them

The Environmental Protection Agency, which since the start of the Trump administration has been moving at a high speed to rewrite federal regulations, is expected to complete work in the weeks that remain in Mr. Trump’s term on two of the nation’s most important air pollution rules: standards that regulate particulates and ozone emitted by factories, power plants, car exhaust and other sources.

almost

Mr. Trump signed an executive order last year directing the Transportation Department to enact the rule within 13 months — even before it had been formally proposed.

The change was backed by the railroad and natural gas industry, which has donated millions of dollars to Mr. Trump, after construction of pipelines had been blocked or slowed after protests by environmentalists.

the proposal provoked an intense backlash from a diverse array of prominent public safety officials.

Any depolarizing event would need to be one where the causes are transparently external in a way that makes it hard for social groups to blame each other

Of the episodes since 1950 where democracies polarized, all of those aside from the United States involved less wealthy, less longstanding democracies, many of which had democratized quite recently.

A series of recent analyses reveals the destructive power of polarization across the American political system.

The United States is quite alone among the ranks of perniciously polarized democracies in terms of its wealth and democratic experience

It is increasingly hard to see what sort of event has that feature these days.

None of the wealthy, consolidated democracies of East Asia, Oceania or Western Europe, for example, have faced similar levels of polarization for such an extended period.

“the United States is the only advanced Western democracy to have faced such intense polarization for such an extended period. The United States is in uncharted and very dangerous territory.”

there are “a number of features that make the United States both especially susceptible to polarization and especially impervious to efforts to reduce it.”

The authors point to a number of causes, including “the durability of identity politics in a racially and ethnically diverse democracy.”

the United States has “a unique combination of a majoritarian electoral system with strong minoritarian institutions.”

An additional cause, the authors write, is thatbinary choice is deeply embedded in the U.S. electoral system, creating a rigid two-party system that facilitates binary divisions of society. For example, only five of twenty-six wealthy consolidated democracies elect representatives to their national legislatures in single-member districts.

The United States is perhaps alone in experiencing a demographic shift that poses a threat to the white population that has historically been the dominant group in all arenas of power, allowing political leaders to exploit insecurities surrounding this loss of status.

“The Senate is highly disproportionate in its representation,” they add, “with two senators per state regardless of population, from Wyoming’s 580,000 to California’s 39,500,000 persons,” which, in turn, “translates to disproportionality in the Electoral College — whose indirect election of the president is again exceptional among presidential democracies.”

finally, there is the three-decade trend of partisan sorting, in whichthe two parties reinforce urban-rural, religious-secular and racial-ethnic cleavages rather than promote crosscutting cleavages. With partisanship now increasingly tied to other kinds of social identity, affective polarization is on the rise, with voters perceiving the opposing party in negative terms and as a growing threat to the nation.

Two related studies — “Inequality, Identity and Partisanship: How Redistribution Can Stem the Tide of Mass Polarization” by Alexander J. Stewart, Joshua B. Plotkin and McCarty and “Polarization Under Rising Inequality and Economic Decline” by Stewart, McCarty and Joanna Bryson — argue that aggressive redistribution policies designed to lessen inequality must be initiated before polarization becomes further entrenched

“once polarization sets in, it typically remains stable under individual-level evolutionary dynamics, even when the economic environment improves or inequality is reversed.”

Interactions with more diverse out-group members pool greater knowledge, applicable to a wider variety of situations. These interactions, when successful, generate better solutions and greater benefits. However, we also assume that the risk of failure is higher for out-group interactions

At the same time, the spread of polarization goes far beyond politics, permeating the culture and economic structure of the broader society.

economic scarcity acts as a strong disincentive to cooperative relations between disparate racial and ethnic groups, in large part because such cooperation may produce more benefits but at higher risk:

In other words, a deeply polarized electorate is highly unlikely to support redistribution that would benefit their adversaries as well as themselves.

In times of prosperity, people are more willing to risk failure, they write, but that willingness disappears when populations arefaced with economic decline. We show that such group polarization can be contagious, and a subpopulation facing economic hardship in an otherwise strong economy can tip the whole population into a state of polarization.

A key finding in our studies is that it really matters when redistributive policies are put in place. Redistribution functions far better as a prevention than a cure for polarization in part for the reason your question suggests: If polarization is already high, redistribution itself becomes the target of polarized attitudes.

Using “data from Amazon, 82.5 million reviews of 9.5 million products and category metadata from 1996-2014,” the authors determined which “product categories are most politically relevant, aligned and polarized.”

While the processes Zmigrod describes characterize the extremes, the electorate as a whole is moving farther and farther apart into two mutually loathing camps.

even small categories like automotive parts have notable political alignment indicative of lifestyle politics. These results indicate that lifestyle politics spread deep and wide across markets.

political psychologists dispute the argument that only “conservatism is associated with prejudice” and that “the types of dispositional characteristics associated with conservatism (e.g., low cognitive ability, low openness) explain this relationship.”

“when researchers use a more heterogeneous array of targets, people across the political spectrum express prejudice against groups with dissimilar values and beliefs.”

Earlier research has correctly found greater levels of prejudice among conservatives, they write, but these studies have focused on prejudice toward liberal-associated groups: minorities, the poor, gay people and other marginalized constituencies.

when the targets of prejudice are expanded to include “conservative-associated groups such as Christian fundamentalists, military personnel and ‘rich people,’” similar levels of prejudice emerge.

Caughey and his co-authors showa surprisingly close correspondence between mass and elite trends.

“people high in cognitive ability are prejudiced against more conservative and conventional groups,” while “people low in cognitive ability are prejudiced against more liberal and unconventional groups.”

he “rigidity-of-the-right hypotheses” should be expanded in recognition of the fact that “cognitive rigidity is linked to ideological extremism, partisanship and dogmatism across political and nonpolitical ideologies.”

“extreme right-wing partisans are characterized by specific psychological traits including cognitive rigidity and impulsivity. This is also true of extreme left-wing partisans.”

a clear inverted-U shaped curve emerged such that those on the extreme right and extreme left exhibited cognitive rigidity on neuropsychological tasks, in comparison to moderates.

“Low openness to experience is associated with prejudice against groups seen as socially unconventional (e.g., atheists, gay men and lesbians),” they write, whereas high openness is “associated with prejudice against groups seen as socially conventional (e.g., military personnel, evangelical Christians).

Analyzing these “pervasive lifestyle politics,” Ruch, Decter-Frain and Batra find that “cultural products are four times more polarized than any other segment.”

1) ideological divergence between Democrats and Republicans has widened dramatically within each domain, just as it has in Congress;

(2) ideological variation across senators’ partisan subconstituencies is now explained almost completely by party rather than state, closely tracking trends in the Senate

(3) economic, racial and social liberalism have become highly correlated across partisan subconstituencies, just as they have across members of Congress

Caughey, Dunham and Warshaw describe the growing partisan salience of racial and social issues since the 1950s:The explanatory power of party on racial issues increased hugely over this period and that of state correspondingly declined. We refer to this process as the “ideological nationalization” of partisan subconstituencies.

In the late 1950s, they continue,party explained almost no variance in racial conservatism in either arena. Over the next half century, the Senate and public time series rise in tandem.

Contrary to the claim that racial realignment had run its course by 1980, they add, “our data indicate that differences between the parties continued to widen through the end of the 20th century, in the Senate as well as in the mass public. By the 2000s, party explained about 80 percent of the variance in senators’ racial conservatism and nearly 100 percent of the variance in the mass public.

“it has limited the two parties’ abilities to tailor their positions to local conditions. Moreover, it has led to greater geographic concentration of the parties’ respective support coalitions.”

Today, across all offices, conservative states are largely dominated by Republicans, whereas the opposite is true of liberal states. The ideological nationalization of the party system thus seems to have undermined party competition at the state level.

this will continue to give ideological extremists an advantage in both parties’ primaries. It also means that the pool of people that run for office is increasingly extreme.

It will probably reduce partisans’ willingness to vote for the out-party. This could dampen voters’ willingness to hold candidates accountable for poor performance and to vote across party lines to select higher-quality candidates. This will probably further increase the importance of primaries as a mechanism for candidate selection.

Looking over the contemporary political landscape, there appear to be no major or effective movements to counter polarization.

As the McCoy-Press report shows, only 16 of the 52 countries that reached levels of pernicious polarization succeeded in achieving depolarization and in “a significant number of instances later repolarized to pernicious levels. The progress toward depolarization in seven of 16 episodes was later undone.”

That does not suggest a favorable prognosis for the United States.

One of the book’s authors, Neil Howe, 71, has become a frequent podcast guest. A follow-up, “The Fourth Turning Is Here,” comes out this month.

The book’s outlook on the near future has made it appealing to macro traders and crypto enthusiasts, and it is frequently cited on the podcasts “Macro Voices,” “Wealthion” and “On the Margin.”

He described it as “this almost fun theory about history,” but added: “And yet there’s something deeply menacing about it.”

Mr. Arbery, who said he does not subscribe to the theory, sees parallels between the fourth turning and other nonscientific beliefs. “I modeled the way that Teresa talks about the fourth turning on the way that young liberals talk about astrology,” he said.

The play’s author, Will Arbery, 33, said he heard about “The Fourth Turning” while researching Stephen K. Bannon, the right-wing firebrand and former adviser to President Donald J. Trump, who is a longtime fan of the book and directed a 2010 documentary based on its ideas.

“I’ve read ‘The Fourth Turning,’ and indeed found it useful from a macroeconomic investing perspective,” Lyn Alden, 35, an investment analyst, wrote in an email. “History doesn’t repeat, but it kind of gives us a loose framework to work with.”

“The Fourth Turning” captured a mood of decline in recent American life. “I remember feeling safe in the ’90s, and then as soon as 9/11 hit, the world went topsy-turvy,” he said. “Every time my cohort got to the point where we were optimistic, another crisis happened. When I read the book, I was like, ‘That makes sense.’”

“The Fourth Turning” was conceived during a period of relative calm. In the late 1980s, Mr. Howe, a Washington, D.C., policy analyst, teamed with William Strauss, a founder of the political satire troupe the Capitol Steps.

Their first book, “Generations,” told a story of American history through generational profiles going back to the 1600s. The book was said to have influenced Bill Clinton to choose a fellow baby boomer, Al Gore, as his running mate

when the 2008 financial crisis hit at almost exactly the point when the start of the fourth turning was predicted, it seemed to many that the authors might have been onto something. Recent events — the pandemic, the storming of the Capitol — have seemingly provided more evidence for the book’s fans.

Historically, a fourth turning crisis has always translated into a civil war, a war of great nations, or both, according to the book. Either is possible over the next decade, Mr. Howe said. But he is a doomsayer with an optimistic streak: Each fourth turning, in his telling, kicks off a renaissance in civic life.

In the new book, he describes what a coming civil war or geopolitical conflict might look like — though he shies away from casting himself as a modern-day Nostradamus.

“This big tidal shift is arriving,” Mr. Howe said. “But if you’re asking me which wave is going to knock down the lighthouse, I can’t do that. I can just tell you that this is the time period. It gives you a good idea of what to watch for.”

two economists asked whether the ongoing slowdown in British productivity was unprecedented. Their answer: not quite, but that it was certainly the worst in the last 250 years, since the very beginning of the Industrial Revolution.

To find a fitting analogue to the British economic experience of the last decade, you have to reach back to a time before the arrival of any significant growth at all, to a period governed much more by Malthusianism, subsistence-level poverty and a nearly flat economic future. By all accounts, things have gotten worse since their paper was published.

there are eight million young Brits in the work force today who have not experienced sustained wage growth at all.

The experience of Britain over the same period suggests another fly in the End of History ointment, undermining a separate supposition of that era, which lives on in zombie form in ours: that convergence meant that rich and well-​governed countries would stay that way.

focusing on a single “Leave” vote risks confusing that one abrupt outburst of xenophobic populism with what in fact is a long-term story of manufactured decline. As Burn-Murdoch demonstrates in another in his series of data-rich analyses of the British plight, the country’s obvious struggles have a very obvious central cause: austerity

in the name of rebalancing budgets, the Tory-led government set about cutting annual public spending, as a proportion of G.D.P., to 39 percent from 46 percent. The cuts were far larger and more consistent than nearly all of Britain’s peer countries managed to enact

The consequences have been remarkable: a very different Britain from the one that reached the turn of the millennium as Tony Blair’s “Cool Britannia.” Real wages have actually declined, on average, over the last 15 years, making America’s wage stagnation over the same period seem appealing by comparison.

the private sector is also behaving shortsightedly, skimping on long-term investments and extracting profits from financial speculation instead: “To put it bluntly, Britain’s capitalist class has effectively given up on the future.”

there has been a slow, sighing decay — one that makes contemporary Britain a revealing case study in the way we talk and think about the fates of nations and the shape of contemporary history.

if the political experience of the last decade has taught us anything, it is that whether the world as a whole is richer than it was 50 years ago matters much less to the people on it today than who got those gains, and how they compare with expectations

it’s cold comfort to point out to an American despairing over Covid-era life expectancy declines that, in fact, a child born today can still expect to live longer than one born in 1995, for instance, or to tell a Brit worrying over his or her economic prospects that added prosperity is likely to come eventually — at the same level enjoyed by economies in the former Eastern Bloc.

Can Britain even stomach such a comparison? The wealthy West has long regarded development as a race that has already and definitively been won, with suspense remaining primarily about how quickly and how fully the rest of the world might catch up

Britain has long since formally relinquished its dreams of world domination, but the implied bargain of imperial retreat was something like a tenured chair at the table of global elders. As it turns out, things can fall apart in the metropole too

Over two centuries, a tiny island nation made itself an empire and a capitalist fable, essentially inventing economic growth and then, powered by it, swallowing half the world. Over just two decades now, it has remade itself as a cautionary tale.

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.”

During the 20th century, the list got much longer. In came existential crises, midlife crises, energy crises and environmental crises. When Koselleck was writing about the subject in the 1970s, he counted up more than 200 kinds of crisis we could then face

Waking up each morning to hear about the latest crisis is dispiriting for some, but throughout history it has been a bracing experience for others. In 1857, Friedrich Engels wrote in a letter that “the crisis will make me feel as good as a swim in the ocean”. A hundred years later, John F Kennedy (wrongly) pointed out that in the Chinese language, the word “crisis” is composed of two characters, “one representing danger, and the other, opportunity”. More recently, Elon Musk has argued “if things are not failing, you are not innovating enough”.

Victor H Mair, a professor of Chinese literature at the University of Pennsylvania, points out that in fact the Chinese word for crisis, wēijī, refers to a perilous situation in which you should be particularly cautious

“Those who purvey the doctrine that the Chinese word for ‘crisis’ is composed of elements meaning ‘danger’ and ‘opportunity’ are engaging in a type of muddled thinking that is a danger to society,” he writes. “It lulls people into welcoming crises as unstable situations from which they can benefit.” Revolutionaries, billionaires and politicians may relish the chance to profit from a crisis, but most people world prefer not to have a crisis at all.

A 2019 study which involved observing participants using bricks, found that those who had been threatened before the task tended to come up with more harmful uses of the bricks (such as using them as weapons) than people who did not feel threatened

The first world war sparked the growth of modernism in painting and literature. The second fuelled innovations in science and technology. The economic crises of the 1970s and 80s are supposed to have inspired the spread of punk and the creation of hip-hop

psychologists have also found that when we are threatened by a crisis, we become more rigid and locked into our beliefs. The creativity researcher Dean Simonton has spent his career looking at breakthroughs in music, philosophy, science and literature. He has found that during periods of crisis, we actually tend to become less creative.

When he looked at 5,000 creative individuals over 127 generations in European history, he found that significant creative breakthroughs were less likely during periods of political crisis and instability.

psychologists have found that it is what they call “malevolent creativity” that flourishes when we feel threatened by crisis.

These are innovations that tend to be harmful – such as new weapons, torture devices and ingenious scams.

A common folk theory is that times of great crisis also lead to great bursts of creativity.

Students presented with information about a threatening situation tended to become increasingly wary of outsiders, and even begin to adopt positions such as an unwillingness to support LGBT people afterwards.

during moments of crisis – when change is really needed – we tend to become less able to change.

When we suffer significant traumatic events, we tend to have worse wellbeing and life outcomes.

, other studies have shown that in moderate doses, crises can help to build our sense of resilience.

we tend to be more resilient if a crisis is shared with others. As Bruce Daisley, the ex-Twitter vice-president, notes: “True resilience lies in a feeling of togetherness, that we’re united with those around us in a shared endeavour.”

Crises are like many things in life – only good in moderation, and best shared with others

The challenge our leaders face during times of overwhelming crisis is to avoid letting us plunge into the bracing ocean of change alone, to see if we sink or swim. Nor should they tell us things are fine, encouraging us to hide our heads in the san

during moments of significant crisis, the best leaders are able to create some sense of certainty and a shared fate amid the seas of change.

This means people won’t feel an overwhelming sense of threat. It also means people do not feel alone. When we feel some certainty and common identity, we are more likely to be able to summon the creativity, ingenuity and energy needed to change things.

guided by a fascination with the wayward paths to fame, he half-unwittingly sows doubt about the justice of the American rise to artistic leadership in the postwar era. In his erudite account, artistic success owes little to vision and purpose, more to self-promotion, but most to unanticipated adoption by bigger systems with other aims, principally oriented toward money, political advantage, or commercial churn

For the greatness and inevitability of artistic consecration, Menand substitutes the arbitrary confluences of forces at any given moment.

The curriculum runs chapter by chapter through George Kennan, George Orwell, Jean-Paul Sartre, Hannah Arendt, Jackson Pollock, Lionel Trilling, Allen Ginsberg, Claude Lévi-Strauss, Robert Rauschenberg and John Cage, Elvis and the Beatles, Isaiah Berlin, James Baldwin, Jack Kerouac, Andy Warhol, Susan Sontag, and Pauline Kael. Each biography opens a door to a school or trend of work

Menand’s is not a “great man” view of history, because no one seems particularly great. One gets a feeling for Sartre as a person, a limited knowledge of how Sartre made Being and Nothingness, and a vivid sense of how the book made Sartre a celebrity. Then one learns how a troupe of others came along and rode his success like a sled.

Menand zooms in and out between individual egomaniacs and the milieus that facilitated their ascent and profited from their publicity.

group biographies, in miniature, of the existentialists, the Beats, the action painters, the Black Mountain School, the British Invasion, the pop artists, and many coteries more—are enchanting singly but demoralizing as they pile up

All of these enterprises look like hives of social insects, not selfless quests for truth or beauty. Menand is a world-class entomologist: He can name every indistinguishable drone, knows who had an oversize mandible, who lost a leg, who carried the best crumbs.

From this vantage, the monuments really are just anthills.

Menand is truly one of the great explainers. He quotes approvingly a lesson taken by Lionel Trilling from his editor Elliot Cohen: “No idea was so difficult and complex but that it could be expressed in a way that would make it understood by anyone to whom it might conceivably be of interest.”

The underlying theory of the book rests on a picture of what makes for “cultural winners,” works and ideas that Menand defines as

He is accurate, he is insightful, and he is not a dumber-downer

Menand’s account of each is an abbreviated tour de force. His explanations work at all levels: interpretation for scholars, review for general readers, introductions for neophytes. Where another writer would take 20 pages to tell us why someone or something mattered historically, Menand does it in two.

goods or styles that maintain market share through “generational” taste shifts—that is, through all the “the king is dead; long live the king” moments that mark the phases of cultural history for people living through it.

Menand’s recountings are less concerned with the changing meanings of individual works than with their successive adoptions and co-optations, in defiance of depth and meaning. It is a process of “winning” often based on cults of personality, indifference to complex origins, and the fortune or misfortune of timing

Menand is notably excellent on how commercial, regulatory, and technological changes determined which kinds of artwork made it to the public. His analysis helps demystify trends in commercial forms like film and pop music, especially when they otherwise seemed to run against the grain of pure profit

Often Menand’s point seems to be that the culture’s reigning talkers and salespeople and debaters need to conjure figures to venerate and attack (in ceaseless alternation) for short-range purposes of attention and competition. Any given work—1984, say, or Bonnie and Clyde—isn’t much of anything until it becomes a counter in other people’s games.

The central question of this period in culture might be whether U.S. artists lived up to expectations

In 1945, Europe was in ruins. America was rich and productive and dictated the terms of the postwar economic and political order. Certainly the U.S. had the power to pretend to cultural glory, too. But was it a pretense, or did Americans really continue and exceed the prewar triumphs of European modernism?

Most histories of the arts after 1945 assume that the greatest American successes deserved their fame.

The thrust of many of Menand’s retellings is that “in the business of cultural exchange, misprision is often the key to transmission.” Fame comes through misreadings, fantasies, unintended resonances, charisma, and publicity.

Menand’s book bequeaths the sense that the last laugh may truly have been on the self-seriousness of a whole historical period, one that treated its most publicized and successful arts figures far too generously, giving them too much credit for depth and vision, while missing the cynical forces by which they’d been buoyed up and marketed

“Foreign film” in America in the ’50s and ’60s—when independent art cinemas emerged, showing imports such as work by Ingmar Bergman and the French New Wave—proves to have been energized by a successful federal-government antitrust action against the monopolistic Hollywood studios

The idea of a “culture industry”

is used unironically by Menand to name the vastly scaled-up production and consumption of all artistic experience. “The culture industries, as they expanded, absorbed and commercialized independent and offbeat culture-makers, and the university, as it expanded, swallowed up the worlds of creative writing and dissident political opinion.”

With his eye on this process, we miss out on artists and thinkers who dug deep and stayed home, who produced as hermits or eccentrics or introverted students of their art

Where did rock ’n’ roll come from?” Menand wonders. He answers that it was “the by-product of a number of unrelated developments in the American music business” that redirected sales to teenagers, and also the result of new radio-station competition, the partial racial desegregation of the music charts, and the arrival of 200-disc jukeboxes

I can imagine The Free World leaving my hypothetical college senior, denizen of the bleak attention economy of the 21st century, feeling liberated to discover that culture was no better—no more committed to a quest for what is true, noble, lasting, and beautiful—in the world of the Baby Boomers and beaming grandparents.

The book is so masterful, and exhibits such brilliant writing and exhaustive research, that I wonder whether Menand could truly have intended where his history of the postwar era landed me. I learned so much, and ended up caring so much les

a major extinction panic happened 100 years ago, and the similarities are unnerving.

The 1920s were also a period when the public — traumatized by a recent pandemic, a devastating world war and startling technological developments — was gripped by the conviction that humanity might soon shuffle off this mortal coil.

It also helps us see how apocalyptic fears feed off the idea that people are inherently violent, self-interested and hierarchical and that survival is a zero-sum war over resources.

Either way, it’s a cynical view that encourages us to take our demise as a foregone conclusion.

What makes an extinction panic a panic is the conviction that humanity is flawed and beyond redemption, destined to die at its own hand, the tragic hero of a terrestrial pageant for whom only one final act is possible

What the history of prior extinction panics has to teach us is that this pessimism is both politically questionable and questionably productive. Our survival will depend on our ability to recognize and reject the nihilistic appraisals of humanity that inflect our fears for the future, both left and right.

As a scholar who researches the history of Western fears about human extinction, I’m often asked how I avoid sinking into despair. My answer is always that learning about the history of extinction panics is actually liberating, even a cause for optimism

Nearly every generation has thought its generation was to be the last, and yet the human species has persisted

As a character in Jeanette Winterson’s novel “The Stone Gods” says, “History is not a suicide note — it is a record of our survival.”

Contrary to the folk wisdom that insists the years immediately after World War I were a period of good times and exuberance, dark clouds often hung over the 1920s. The dread of impending disaster — from another world war, the supposed corruption of racial purity and the prospect of automated labor — saturated the period

The previous year saw the publication of the first of several installments of what many would come to consider his finest literary achievement, “The World Crisis,” a grim retrospective of World War I that laid out, as Churchill put it, the “milestones to Armageddon.

Bluntly titled “Shall We All Commit Suicide?,” the essay offered a dismal appraisal of humanity’s prospects. “Certain somber facts emerge solid, inexorable, like the shapes of mountains from drifting mist,” Churchill wrote. “Mankind has never been in this position before. Without having improved appreciably in virtue or enjoying wiser guidance, it has got into its hands for the first time the tools by which it can unfailingly accomplish its own extermination.”

The essay — with its declaration that “the story of the human race is war” and its dismay at “the march of science unfolding ever more appalling possibilities” — is filled with right-wing pathos and holds out little hope that mankind might possess the wisdom to outrun the reaper. This fatalistic assessment was shared by many, including those well to Churchill’s left.

“Are not we and they and all the race still just as much adrift in the current of circumstances as we were before 1914?” he wondered. Wells predicted that our inability to learn from the mistakes of the Great War would “carry our race on surely and inexorably to fresh wars, to shortages, hunger, miseries and social debacles, at last either to complete extinction or to a degradation beyond our present understanding.” Humanity, the don of sci-fi correctly surmised, was rushing headlong into a “scientific war” that would “make the biggest bombs of 1918 seem like little crackers.”

The pathbreaking biologist J.B.S. Haldane, another socialist, concurred with Wells’s view of warfare’s ultimate destination. In 1925, two decades before the Trinity test birthed an atomic sun over the New Mexico desert, Haldane, who experienced bombing firsthand during World War I, mused, “If we could utilize the forces which we now know to exist inside the atom, we should have such capacities for destruction that I do not know of any agency other than divine intervention which would save humanity from complete and peremptory annihilation.”

F.C.S. Schiller, a British philosopher and eugenicist, summarized the general intellectual atmosphere of the 1920s aptly: “Our best prophets are growing very anxious about our future. They are afraid we are getting to know too much and are likely to use our knowledge to commit suicide.”

Many of the same fears that keep A.I. engineers up at night — calibrating thinking machines to human values, concern that our growing reliance on technology might sap human ingenuity and even trepidation about a robot takeover — made their debut in the early 20th century.

The popular detective novelist R. Austin Freeman’s 1921 political treatise, “Social Decay and Regeneration,” warned that our reliance on new technologies was driving our species toward degradation and even annihilation

Extinction panics are, in both the literal and the vernacular senses, reactionary, animated by the elite’s anxiety about maintaining its privilege in the midst of societal change

There is a perverse comfort to dystopian thinking. The conviction that catastrophe is baked in relieves us of the moral obligation to act. But as the extinction panic of the 1920s shows us, action is possible, and these panics can recede

To whatever extent, then, that the diagnosis proved prophetic, it’s worth asking if it might have been at least partly self-fulfilling.

today’s problems are fundamentally new. So, too, must be our solutions

It is a tired observation that those who don’t know history are destined to repeat it. We live in a peculiar moment in which this wisdom is precisely inverted. Making it to the next century may well depend on learning from and repeating the tightrope walk — between technological progress and self-annihilation — that we have been doing for the past 100 years

We have gotten into the dangerous habit of outsourcing big issues — space exploration, clean energy, A.I. and the like — to private businesses and billionaires

That ideologically varied constellation of prominent figures shared a basic diagnosis of humanity and its prospects: that our species is fundamentally vicious and selfish and our destiny therefore bends inexorably toward self-destruction.

Less than a year after Churchill’s warning about the future of modern combat — “As for poison gas and chemical warfare,” he wrote, “only the first chapter has been written of a terrible book” — the 1925 Geneva Protocol was signed, an international agreement banning the use of chemical or biological weapons in combat. Despite the many horrors of World War II, chemical weapons were not deployed on European battlefields.

As for machine-age angst, there’s a lesson to learn there, too: Our panics are often puffed up, our predictions simply wrong

In 1928, H.G. Wells published a book titled “The Way the World Is Going,” with the modest subtitle “Guesses and Forecasts of the Years Ahead.” In the opening pages, he offered a summary of his age that could just as easily have been written about our turbulent 2020s. “Human life,” he wrote, “is different from what it has ever been before, and it is rapidly becoming more different.” He continued, “Perhaps never in the whole history of life before the present time, has there been a living species subjected to so fiercely urgent, many-sided and comprehensive a process of change as ours today. None at least that has survived. Transformation or extinction have been nature’s invariable alternatives. Ours is a species in an intense phase of transition.”

The standard explanation of this unhinging, repeated in graduate-school classrooms and in advice to politicians, is technological change.

This explanation, known as skill-biased technical change, is so common that economists just call it S.B.T.C. They use it to explain why everyone from the extremely rich to the just-kind-of rich are doing so much better than everyone else.

For all their disagreements, Autor and Mishel are allies of sorts. Both are Democrats who have advised President Barack Obama, and both agree that rampant inequality can undermine democracy and economic growth by fostering despair among workers and corruption among the wealthy

The change came around 1978, Mishel said, when politicians from both parties began to think of America as a nation of consumers, not of workers.

each administration and Congress have made choices — expanding trade, deregulating finance and weakening welfare — that helped the rich and hurt everyone else. Inequality didn’t just happen, Mishel argued. The government created it.

Computers and the Internet, Mishel argued, are just new examples on the continuum and cannot explain a development like extreme inequality, which is so recent. So what happened?

David Autor, one of the country’s most celebrated labor economists, took the stage, fumbled for his own PowerPoint presentation and then explained that there was plenty of evidence showing that technological change explained a great deal about the rise of income inequality. Computers, Autor says, are fundamentally different. Conveyor belts and massive steel furnaces made blue-collar workers comparatively wealthier and hurt more highly skilled crafts­people, like blacksmiths and master carpenters, whose talents were disrupted by mass production. The computer revolution, however, displaced millions of workers from clerical and production occupations, forcing them to compete in lower-paying jobs in the retail, fast-food and home health sectors. Meanwhile, computers and the Internet disproportionately helped people like doctors, engineers and bankers in information-intensive jobs. Inequality was merely a side effect of the digital revolution, Autor said; it didn’t begin and end in Washington.

Levy suggested seeing how inequality has played out in other countries

In Germany, the average worker might make less than an American, but the government has established an impressive apprenticeship system to keep blue-collar workers’ skills competitive.

For decades, the Finnish government has offered free education all the way through college. It may have led to high taxes, but many believe it also turned a fairly poor fishing economy into a high-income, technological nation.

On the other hand, Greece, Spain and Portugal have so thoroughly protected their workers that they are increasingly unable to compete

Inequality has risen almost everywhere, which, Levy says, means that Autor is right that inequality is not just a result of American-government decisions. But the fact that inequality has risen unusually quickly in the United States suggests that government does have an impact

Still, economists certainly cannot tell us which policy is the right one. What do we value more: growth or fairness? That’s a value judgment. And for better or worse, it’s up to us.

new research by the Harvard political scientist Robert D. Putnam and his colleagues shows that the rich-poor gaps in student participation in sports, extracurricular activities, volunteer work and church attendance have grown sharply as well.

average test scores on the National Assessment of Educational Progress, the so-called Nation’s Report Card, have been rising — substantially in math and very slowly in reading — since the 1970s.

The most potent development over the past three decades is that the test scores of children from high-income families have increased very rapidly.

the rich now outperform the middle class by as much as the middle class outperform the poor. Just as the incomes of the affluent have grown much more rapidly than those of the middle class over the last few decades, so, too, have most of the gains in educational success accrued to the children of the rich.

For the past few years, alongside other scholars, I have been digging into historical data to understand

It’s not just that the rich have more money than they used to, it’s that they are using it differently. This is where things get really interesting.

The widening income disparity in academic achievement is not a result of widening racial gaps in achievement, either. The achievement gaps between blacks and whites, and Hispanic and non-Hispanic whites have been narrowing slowly over the last two decade

schools don’t seem to produce much of the disparity in test scores between high- and low-income students.

That isn’t to say that there aren’t important differences in quality between schools serving low- and high-income students — there certainly are — but they appear to do less to reinforce the trends than conventional wisdom would have us believe.

The academic gap is widening because rich students are increasingly entering kindergarten much better prepared to succeed in school than middle-class students. This difference in preparation persists through elementary and high school.

The average 9-year-old today has math skills equal to those her parents had at age 11, a two-year improvement in a single generation. The gains are not as large in reading and they are not as large for older students, but there is no evidence that average test scores have declined over the last three decades for any age or economic group.

the incomes of the rich have grown faster over the last 30 years than the incomes of the middle class and the poor. Money helps families provide cognitively stimulating experiences for their young children because it provides more stable home environments, more time for parents to read to their children, access to higher-quality child care and preschool

one part of the explanation for this is rising income inequality

High-income families are increasingly focusing their resources — their money, time and knowledge of what it takes to be successful in school — on their children’s cognitive development and educational success. They are doing this because educational success is much more important than it used to be, even for the rich.

even though middle-class and poor families are also increasing the time and money they invest in their children, they are not doing so as quickly or as deeply as the rich.

from 1972 to 2006 high-income families increased the amount they spent on enrichment activities for their children by 150 percent, while the spending of low-income families grew by 57 percent over the same time period

the amount of time parents spend with their children has grown twice as fast since 1975 among college-educated parents as it has among less-educated parents.

much of our public conversation about education is focused on the wrong culprits: we blame failing schools and the behavior of the poor for trends that are really the result of deepening income inequality and the behavior of the rich.

not only are the children of the rich doing better in school than even the children of the middle class, but the changing economy means that school success is increasingly necessary to future economic success, a worrisome mutual reinforcement of trends that is making our society more socially and economically immobile.

the rapid growth in the rich-poor educational gap provides a ray of hope: if the relationship between family income and educational success can change this rapidly, then it is not an immutable, inevitable pattern. What changed once can change again. Policy choices matter more than we have recently been taught to think.

how can we move toward a society in which educational success is not so strongly linked to family background? Maybe we should take a lesson from the rich and invest much more heavily as a society in our children’s educational opportunities from the day they are born. Investments in early-childhood education pay very high societal dividends. That means investing in developing high-quality child care and preschool that is available to poor and middle-class children. It also means recruiting and training a cadre of skilled preschool teachers and child care providers.

improving the quality of our parenting and of our children’s earliest environments may be even more important. Let’s invest in parents so they can better invest in their children.

Fundamentally, it means rethinking our still-persistent notion that educational problems should be solved by schools alone.

One of the oldest genomes studied came from a thigh bone discovered in Goyet Cave in Belgium and given the unwieldy name GoyetQ116-1. Radiocarbon dating pegs the Goyet individual at some 35,000 years old,

Around 1,000 years after the Goyet individual was found, a new culture swept through Europe: the Gravettians. Analysis of genetic material from the time shows that art and artifacts weren't the only things changing. The Gravettians' DNA was significantly different from their Aurignacian predecessors, suggesting that they were a completely separate lineage.

Goyet guy's descendants retreated to the Iberian Peninsula (modern day Spain and Portugal) and waited for their time to come again.

It did, some 15,000 years later. Probably spurred by climate changes as glaciers began to recede, this dormant lineage expanded back into the rest of Europe, bearing a new culture known as Magdalenian.

Not long after that, their genomes started to look like those of people from the Middle East and the Caucasus, suggesting that new arrivals from the southeast were mingling with — and in some cases supplanting — the existing population.

This was a surprise, because researchers used to think that transition happened much later, when Turkish farmers introduced agriculture to Europe some 8,500 years ago.

The genetic analysis allowed researchers to trace the inexorable decline of Neanderthal DNA, which was two to three times more prominent in early human genomes than it is in modern-day ones. This supports theories that early humans interbred with Neanderthals, but that their DNA was toxic to us and gradually weeded out by natural selection over the course of millennia.

Historically, boom times are the exception, not the norm.

Over the past two centuries, per capita incomes in all advanced economies, from Sweden to Japan, have grown at compound rates of around 1.5% to 2% a year

these distinctly non-euphoric averages mean that most of the time, over the long sweep of history, people’s incomes typically take about 40 years to double.

looking from one year to the next, the improvements in living standards that come from higher incomes are glacial. The data may show that life is getting better, but average families feel no reason to break out the champagne.

that is no longer good enough. Americans expect the economy to be buoyant, not boring. Yet this expectation is shaped not by prosaic economic realities but by a most unusual period in history: the quarter-century that began in the ashes of World War II, when the world economy performed better than at any time before or since.

The Golden Age was the first sustained period of economic growth in most countries since the 1920s. But it was built on far more than just pent-up demand and the stimulus of the postwar baby boom. Unprecedented productivity growth around the world made the Golden Age possible. In the 25 years that ended in 1973, the amount produced in an hour of work roughly doubled in the U.S. and Canada, tripled in Europe and quintupled in Japan.

Many factors played a role in this achievement.

The workforce everywhere became vastly more educated.

As millions of laborers shifted from tending sheep and hoeing potatoes to working in factories and construction sites, they could create far more economic value.

New motorways boosted productivity in the transportation sector by letting truck drivers cover longer distances with larger vehicles. Faster ground transportation made it practical, in turn, for farms and factories to expand to sell not just locally but regionally or nationally, abandoning craft methods in favor of machinery that could produce more goods at lower cost.

Six rounds of tariff reductions brought a massive increase in cross-border trade, putting even stronger competitive pressure on manufacturers to become more efficient.

Above all, technological innovation helped to create new products and offered better ways for workers to do their jobs.

The 1973 oil crisis meant more than just gasoline lines and lowered thermostats. It shocked the world economy.

But it wasn’t the price of gasoline that brought the long run of global prosperity to an end. It just diverted attention from a more fundamental problem: Productivity growth had slowed sharply.

The consequences of the productivity bust were severe. Full employment vanished. It would be 24 years before the U.S. unemployment rate would again reach the low levels of late 1973

and the infinitesimal unemployment rates in France, Germany and Japan would never be reached again. Through the rest of the 20th century, the jobless rate in 28 wealthy economies would average nearly 7%.

the world’s overall economic growth rate dropped from 4.9% a year from 1951 through 1973 to an average of just 3.1% for the balance of the century.

With economic planners and central bankers unable to steady their economies, voters turned sharply to the right

Conservative politicians such as Margaret Thatcher in the U.K., Ronald Reagan in the U.S. and Helmut Kohl in West Germany swept into power, promising that freer markets and smaller government would reverse the decline, spur productivity and restore rapid growth.

But these leaders’ policies—deregulation, privatization, lower tax rates, balanced budgets and rigid rules for monetary policy—proved no more successful at boosting productivity than the statist policies that had preceded them

Some insist that the conservative revolution stimulated an economic renaissance, but the facts say otherwise: Great Britain’s productivity grew far more slowly under Thatcher’s rule than during the miserable 1970s, and Reagan’s supply-side tax cuts brought no productivity improvement at all.

It is tempting to think that we know how to do better, that there is some secret sauce that governments can ladle out to make economies grow faster than the norm. But despite glib talk about “pro-growth” economic policies, productivity growth is something over which governments have very little control

That means history is best kept on a tight leash.

The unstated reason for Xi’s unwillingness to disavow the Mao era is that Mao is not just China’s Stalin. The Soviet Union was able to discard Stalin because it still had Lenin to fall back on as its founding father. For the Communist party of China, Mao is Stalin and Lenin combined; attack Mao and his era and you attack the foundations of the Communist state.

on a broader level, history is especially sensitive because change in a communist country often starts with history being challenged.

Building on the work of his predecessors, especially Hu Jintao and his call for a Taoist-sounding “harmonious society” (hexie shehui), Xi’s ideological programme includes an explicit embrace of traditional ethical and religious imagery.

efforts to commemorate the past are often misleading or so fragmentary as to be meaningless. Almost all plaques at historical sites, for example, tell either partial histories or outright lies

The Communist party does not just suppress history, it recreates it to serve the present. In China, this has followed the party’s near self-destruction in the Cultural Revolution, which led to a desperate search for ideological legitimacy. At first, this was mainly economic, but following the massacre of pro-democracy protesters in Tiananmen Square in June 1989, the party began to promote itself more aggressively as the defender of Chinese culture and tradition.

One way it has begun to do this has been to position itself as a protector of “intangible cultural heritage”, a term adopted from Unesco, which keeps a country-by-country list of traditions important to specific nations. As opposed to world heritage sites, which are physical structures such as the Great Wall or Forbidden City, intangible heritage includes music, cuisine, theatre, and ceremonies.

the country’s urban centres are built on an obliterated past, which only sometimes seeps into the present through strange-sounding names for streets, parks, and subway stops.

As late as 1990s China, some of these traditions were still labelled “feudal superstition”, a derogatory term in the communist lexicon synonymous with backward cultural practices. For example, traditional funerals were widely discouraged, but now are on the government list of intangible culture. So, too, religious music that is performed exclusively in Taoist temples during ceremonies.

In 2013, according to a news report on 5 December of that year, Xi visited Confucius’s hometown of Qufu, picked up a copy of The Analects – a book of sayings and ideas of the great sage – as well as a biography of him, and declared: “I want to read these carefully.” He also coined his own Confucianesque aphorism – “A state without virtue cannot endure.” The next year, he became the first Communist party leader to participate in a commemoration of Confucius’s birthday.

The China Dream was to be Xi Jinping’s contribution to national sloganeering – every top leader has to have at least one

Xi’s idea was simple to grasp – who doesn’t have a dream? The slogan would become associated with many goals, including nationalism and China’s surge to global prominence, but domestically, its imagery was almost always linked to traditional culture and virtues

Liu spoke freely, without notes, for 90 minutes about something that might seem obscure but that was slowly shaking China’s intellectual world: the discovery of long-lost texts from 2,500 years ago

The texts we were here to learn about had been written a millennium later on flat strips of bamboo, which were the size of chopsticks. These writings did not describe the miscellanea of court life – instead, they were the ur-texts of Chinese culture. Over the past 20 years, three batches of bamboo slips from this era have been unearthed. Liu was there to introduce the third – and biggest – of these discoveries, a trove of 2,500 that had been donated to Tsinghua University in 2008.

The texts stem from the Warring States period, an era of turmoil in China that ran from the 5th to the 3rd centuries BC. All major Chinese schools of thought that exist today stem from this era, especially Taoism and Confucianism, which has been the country’s dominant political ideology, guiding kings and emperors – at least in theory – until the 20th century.

“It’s as though suddenly you had texts that discussed Socrates and Plato that you didn’t know existed,” Sarah Allan, a Dartmouth university professor who has worked with Liu and Li in the project, told me a few months before I heard Liu speak. “People also say it’s like the Dead Sea scrolls, but they’re more important than that. This isn’t apocrypha. These texts are from the period when the core body of Chinese philosophy was being discussed. They are transforming our understanding of Chinese history.”

One of the surprising ideas that comes through in the new texts is that ideas that were only alluded to in the Confucian classics are now revealed as full-blown schools of thought that challenge key traditional ideas. One text, for example, argues in favour of meritocracy much more forcefully than is found in currently known Confucian texts

Until now, the Confucian texts only allowed for abdication or replacement of a ruler as a rare exception; otherwise kingships were hereditary – a much more pro-establishment and anti-revolutionary standpoint. The new texts argue against this. For an authoritarian state wrapping itself in “tradition” to justify its never-ending rule, the implications of this new school are subtle but interesting. “This isn’t calling for democracy,” Allan told me, “but it more forcefully argues for rule by virtue instead of hereditary rule.

The four-week moving average of claims, a less volatile measure than the weekly figures, decreased to 260,500 from 265,000

Last week included the 12th of the month, which coincides with the period the Labor Department surveys employers to calculate monthly payroll data. The average was little changed from the 259,500 during the comparable period in March.

this idea and its implications stir more controversy among criminologists than any other. Would you state your position as precisely as possible in this brief space?

Latzer: First of all, culture and race, in the biological or genetic sense, are very different. Were it not for the racism of the 18th and 19th centuries, we might not have had a marked cultural difference between blacks and whites in the U.S. But history cannot be altered, only studied and sometimes deplored. 28 28

Different groups of people, insofar as they consider themselves separate from others, share various cultural characteristics: dietary, religious, linguistic, artistic, etc. They also share common beliefs and values. There is nothing terribly controversial about this. If it is mistaken then the entire fields of sociology and anthropology are built on mistaken premises.

With respect to violent crime, scholars are most interested in a group's preference for violence as a way of resolving interpersonal conflict. Some groups, traditionally rural, developed cultures of “honor”—strong sensitivities to personal insult. We see this among white and black southerners in the 19th century, and among southern Italian and Mexican immigrants to the U.S. in the early 20th century. These groups engaged in high levels of assaultive crimes in response to perceived slights, mainly victimizing their own kind.

This honor culture explains the high rates of violent crime among African Americans who, living amidst southern whites for over a century, incorporated those values. When blacks migrated north in the 20th century, they transported these rates of violence. Elijah Anderson's book, The Code of the Streets, describes the phenomenon, and Thomas Sowell, in Black Liberals and White Rednecks, helps explain it. 28 28

Theories of crime that point to poverty and racism have the advantage of explaining why low-income groups predominate when it comes to violent crime. What they really explain, though, is why more affluent groups refrain from such crime. And the answer is that middle-class people (regardless of race) stand to lose a great deal from such behavior.

The cultural explanation for violence is superior to explanations that rest of poverty or racism, however, because it can account for the differentials in the violent-crime rates of groups with comparable adversities

Frum: Let’s flash forward to the present day. You make short work of most of the theories explaining the crime drop-off since the mid-1990s: the Freakonomics theory that attributes the crime decline to easier access to abortion after 1970; the theory that credits reductions in lead poisoning; and the theory that credits the mid-1990s economic spurt. Why are these ideas wrong? And what would you put in their place? 28 28

both the abortion and leaded-gasoline theories are mistaken because of a failure to explain the crime spike that immediately preceded the great downturn. Abortions became freely available starting in the 1970s, which is also when lead was removed from gasoline. Fast-forward 15 to 20 years to the period in which unwanted babies had been removed from the population and were not part of the late adolescent, early adult, cohort. This cohort was responsible for the huge spike in crime in the late 1980s, early 1990s, the crack cocaine crime rise. Why didn't the winnowing through abortion of this population reduce crime?

Likewise, the lead removal theory. The same "lead-free" generation that engaged in less crime from 1993 on committed high rates of violent crime between 1987 and 1992.

As for economic booms, it is tempting to argue that they reduce crime on the theory that people who have jobs and higher incomes have less incentive to rob and steal. This is true. But violent crimes, such as murder and manslaughter, assault, and rape, are not motivated by pecuniary interests. They are motivated by arguments, often of a seemingly petty nature, desires for sexual conquest by violence in the case of rape, or domestic conflicts, none of which are related to general economic conditions

Rises in violent crime have much more to do with migrations of high-crime cultures, especially to locations in which governments, particularly crime-control agents, are weak.

Declines are more likely when crime controls are strong, and there are no migrations or demographic changes associated with crime rises

In short, the aging of the violent boomer generation followed by the sudden rise and demise of the crack epidemic best explains the crime trough that began in the mid-1990s and seems to be continuing even today.

Contrary to leftist claims, strengthened law enforcement played a major role in the crime decline. The strengthening was the result of criminal-justice policy changes demanded by the public, black and white, and was necessitated by the weakness of the criminal justice system in the late ‘60s

On the other hand, conservatives tend to rely too much on the strength of the criminal-justice system in explaining crime oscillations, which, as I said, have a great to do with migrations and demographics

The contemporary challenge is to keep law enforcement strong without alienating African Americans, an especially difficult proposition given the outsized violent-crime rates in low-income black communities.

Frum: The sad exception to the downward trend in crime since 1990 is the apparent increase in mass shootings

Should such attacks be included in our thinking about crime? If so, how should we think about them? 28 28

If we separate out the ideologically motivated mass killings, such as Orlando (apparently) and San Bernardino, then we have a different problem. Surveilling potential killers who share a violent ideology will be extremely difficult but worthwhile. Limiting the availability of rapid-fire weapons with high-capacity ammunition clips is also worth doing, but politically divisive.

of course, developments abroad will affect the number of incidents, as will the copycat effect in the immediate aftermath of an incident. This is a complex problem, different from ordinary killings, which, by the way, take many more lives.

the overwhelming majority of self-identifying addicts—about 90 percent—are male. Women are more often categorized as “love addicts,” with a compulsive tendency to fall into dependent relationships and form unrealistic bonds with partners. That’s partly because women are more apt than men to be stigmatized by association with sex addiction

“Sex addiction” remains a controversial designation—often dismissed as a myth