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Normal accidents, like these, occur because two or more independent failures happen and interact in unpredictable ways. After studying calamities such as the Three Mile Island meltdown, explosions at chemical plants, and ships colliding in the open sea, Perrow observed that safety mechanisms put in place to make the systems safer in fact frequently trigger the final failure.

That solution won’t work for financial markets. We need currency hedges, futures markets, and derivatives to keep our economic systems functioning. But we also have to realize tweaking the current system will not fix the problem. Most of the supposedly strong cures implemented by legislators to date, such as prohibiting bank holding companies from proprietary trading, are inadequate as well.

how do we make our markets less danger prone? A good place to start would be to reduce the excessive trading volumes that lie at the root of accidents like the Flash Freeze, Flash Cash, and Goldman debacle. There is no valid reason for high frequency trading to make up more than 50 percent of all stock trades, and there is no pressing need for some $4 trillion in daily foreign currency transactions. A Tobin tax on transactions, first suggested by Noble laureate James Tobin in 1972, of as little as 0.1 percent, would significantly reduce these volumes. Smaller transaction volumes would reduce the size of accidents and possibly their frequency.

But tinkering with the current system and looking for easy ways out, as we are now, is bound to fail. We’re in danger of letting normal accidents in the financial system become all too normal.

At the book’s center is Mr. Piketty’s contention — contrary to the influential theory developed by Simon Kuznets in the 1950s and ’60s — that mature capitalist economies do not inevitably evolve toward greater economic equality. Instead, Mr. Piketty contends, the data reveals a deeper historical tendency for the rate of return on capital to outstrip the overall rate of economic growth, leading to greater and greater concentrations of wealth at the very top.

Mr. Piketty rejected any economic determinism. “It all depends on what the political system decides,” he said.

Mr. Piketty, who writes in the book that the collapse of Communism in 1989 left him “vaccinated for life” against the “lazy rhetoric of anticapitalism,” is no Marxian revolutionary. “I believe in private property,” he said in the interview. “But capitalism and markets should be the slave of democracy and not the opposite.”

ct, their lifetime earnings are reduced by one year.

The benefits of being younger are even greater for those who skip a grade, an option available to many high-achieving children. Compared with nonskippers of similar talent and motivation, these youngsters pursue advanced degrees and enter professional school more often. Acceleration is a powerful intervention, with effects on achievement that are twice as large as programs for the gifted.

Parents who want to give their young children an academic advantage have a powerful tool: school itself. In a large-scale study at 26 Canadian elementary schools, first graders who were young for their year made considerably more progress in reading and math than kindergartners who were old for their year

school makes children smarter.

The question we should ask instead is: What approach gives children the greatest opportunity to learn?

These differences may come from the increased challenges of a demanding environment. Learning is maximized not by getting all the answers right, but by making errors and correcting them quickly.

Some children, especially boys, are slow to mature emotionally, a process that may be aided by the presence of older children.

The benefits of interacting with older children may extend to empathetic abilities. Empathy requires the ability to reason about the beliefs of others. This capacity relies on brain maturation, but it is also influenced by interactions with other children. Having an older (but not younger) sibling speeds the onset of this capacity in 3- to 5-year-olds. The acceleration is large: up to half a year per sibling.

children are not on a fixed trajectory but learn actively from teachers — and classmates. It matters very much who a child’s peers are. Redshirted children begin school with others who are a little further behind them. Because learning is social, the real winners in that situation are their classmates.

But in the U.S., the issue is still a political non-starter for mainstream politicians, due to lingering suspicions about the fairness and practicality of a basic income, as well as a rejection of the premise that automation is actually erasing white-collar jobs.

“The sad reality is that a lot of the people who will most need a basic income are not likely to generate a lot of sympathy among volunteer donors,” Ford says. “You see this already with charitable giving—people will give for families, children, and pets—but not so much for single homeless men.” Ford cautions against what he calls the “libertarian/techno-optimistic fantasy” of a private market solution. “Government, for all its deficiencies, is going to be the only real tool in the toolbox here.”

“Part of white fragility is to assume that when we talk about racism, we are calling someone out as being individually a racist,” he said. “So if you say we're going to talk about racism, white people think you're going to call them a name. But for most people of color it's a system. And we're talking about dealing with a structure so the real problem is the system.”

When separate groups of people are using the same word with different implied meanings then problems will persist.

When it comes to racism and increased segregation, both Wise and DiAngelo noted that there seems to be this rigid unwillingness to address any inequality, because it would upset the very people who are both benefiting from the injustice and refusing to acknowledge its existence.

The fear is that if someone seeks to define and fix racism, many white people feel like they’re being directly attacked. So instead of waiting for the attack, white fragility promotes protection by putting punitive restrictions on “the others.”

The Obama era has been an interesting petri dish of white fragility. On the heels of a moderate economic recovery, we’ve seen sweeping new state laws aimed at social issues: voting rights restrictions, defunding of Planned Parenthood, anti-gay legislation, Stand Your Ground bills, and restrictive union laws to weaken their bargaining power. These laws have resulted in a rollback of rights for minorities, women, the LGBT movement, and the working class.

The strangest thing about white fragility politics is that the detrimental policy results are spread out across race and class. Yet, the political results for the conservative movement priming the pump of white fragility and rage is election victories. And why should they change when they can get large sections of an aging white population to consistently vote for policies proven to statistically hurt their economic chances, personal health, their children’s education, and their very safety?

These are not rational decisions. These are fear-based politics that create avoidable disasters in which all suffer. This new wave of segregation fear is surging across the country. In response to the continued white fragility panic of 2008, conservative political movements are set to capitalize on the cycles of manufactured hysteria. “We are watching the repeal of the 20th century,” Wise said.

When I asked Wise and DiAngelo to give me something hopeful for the future, they both gave me a bleak picture. When I suggested that more facts and evidence could sway people, they disagreed. “People who are deeply committed to a world view don’t change their opinions when confronted with new facts,” Wise said. “Oddly enough, new facts cause them to dig in more deeply.”

When I think of depictions of friendships that have moved me, I find myself thinking mostly of books — of those passages in novels that illuminate friendship by its moments of thorniness, by the heartbreak it can cause. Real friendship is complex.

The best works of art about friendship resonate by showing how our closest friends have a way of ruining our attempts to present ourselves as perfect; how those picturesque moments are belied by other truths.

Your ancestors came in chains. In your book the dream of the comfortable suburban life is a “fairy tale.” For you, slavery is the original American sin, from which there is no redemption. America is Egypt without the possibility of the Exodus. African-American men are caught in a crushing logic, determined by the past, from which there is no escape.

The innocent world of the dream is actually built on the broken bodies of those kept down below.

I think you distort American history. This country, like each person in it, is a mixture of glory and shame. There’s a Lincoln for every Jefferson Davis and a Harlem Children’s Zone for every K.K.K. — and usually vastly more than one. Violence is embedded in America, but it is not close to the totality of America.

In your anger at the tone of innocence some people adopt to describe the American dream, you reject the dream itself as flimflam. But a dream sullied is not a lie. The American dream of equal opportunity, social mobility and ever more perfect democracy cherishes the future more than the past. It abandons old wrongs and transcends old sins for the sake of a better tomorrow.

This dream is a secular faith that has unified people across every known divide. It has unleashed ennobling energies and mobilized heroic social reform movements. By dissolving the dream under the acid of an excessive realism, you trap generations in the past and destroy the guiding star that points to a better future.

Ben.Lynch Augusta, Georgia 1 day ago I've followed Mr. Coates for sometime now and tend to agree with his viewpoints. As a white southern male who works in our segregated education systems, it took years for me to actually apprehend my day to day interactions with black children in poverty. For the longest time, I simply couldn't understand the behaviors I saw, the reactions, and at first I reacted with contempt, but then I began to understand little by little. I don't think I can express it to anyone here, let alone Mr. Brooks, but it is something that one only appears to get by letting it sink into your bones day after day, hour after hour. The conditions are terrible and promise to remain so for the rest of my career. My students know, even if they lack the rhetorical chops to express it, that the game is rigged, that what we sell, meaning America at large, to make ourselves feel better, to feel just, is demonstrably a false bill of goods that does nothing to solve the actual problems of their life. These students are so used to being crushed that they can't even begin to articulate that they are being crushed because it's simply how it is. Some suppose Mr. Coates is overly dour, overly negative, but he provides a necessary contrapuntal to those who assume that the arc of the universe inevitably bends toward justice. Struggle can and often does end in defeat. The wicked often sleep as well as the just and sometimes better. The sins of the fathers remain fixed around the necks of the sons and daughters.

Even W. E. B. Du Bois had trouble formulating a theoretically accurate account of racial identity, so he put it simply: A black man is “a person who must ride ‘Jim Crow’ in Georgia.” But his statement still leaves us with a puzzle: What would a black man be without Jim Crow to define him?

The historical evidence is overwhelming, then, that the color line has always been far more porous and fragile than one might assume. In some places, it was so brittle that it could buckle and break.

To say that race is socially constructed gives it an air of make-believe. Race is quite real to those who live with it. Ask the families of the black men and women who have lost their lives during tragic encounters with the police. The choices about “who” they were, were not their own.

There is no essentialized, fixed, “true identity” waiting just below the surface. Identities are contingent, elusive and, as the cultural theorist Stuart Hall argued, “always in process.

at the very least, perhaps we can use Ms. Dolezal’s story, puzzling as it is, as an opportunity to have a candid, lively, long-delayed, public conversation about the knotty meanings of race and racial identity, and how it has confounded our nation’s best aspirations. Perhaps we may yet move beyond the imprisoning boxes we have made.

we should also learn to check that tendency to just immediately assume rape accusers are lying, a tendency that’s so out of control that many people believe or at least entertain the possibility that 30 women could somehow be conspiring to lie together for reasons unknown.

Part of the reason this happens at these firms in particular is just very logistical. The firms end up dedicating HR staff to a specific school—so they'll have a team for Harvard, they'll have a team for Princeton, Columbia, Stanford, and so forth. When you are from one of those schools and you submit your resume, there's a designated person or team whose job it is to review your resume. When you're not at one of those listed schools what ends up happening is that your resume just goes into this big broad bucket where they may or may not be a certain person who's charged with reviewing those resumes.

But you may not be identifying people who are best at the job and, crucially, you're restricting the class diversity and racial diversity to those who tend to attend the most elite schools.

But this creates a Catch 22 in two ways: The first is that individuals who come from socio-economically disadvantaged backgrounds don't often know that telling these deeply personal stories is appropriate. Second, some people actually want to hide information about coming from an underprivileged background because they think it could harm the perceptions of fit. So they don't know that telling these stories can be advantageous.

Suppose you have every reason to believe that you own a Bentley, since you have had it in your possession for many years, and you parked it that morning at its usual spot. However, it has just been destroyed by a bomb, so that you own no Bentley, despite your well justified belief that you do. As you sit in a cafe having your morning latte, you muse that someone in that cafe owns a Bentley (since after all you do). And it turns out you are right, but only because the other person in the cafe, the barista, owns a Bentley, which you have no reason to suspect. So you here have a well justified true belief that is not knowledge.

After many failed attempts to fix the justified-true-belief account with minor modifications, philosophers tried more radical departures. One promising approach suggests that knowledge is a form of action, comparable to an archer’s success when he consciously aims to hit a target.

An archer’s shot can be assessed in several ways. It can be accurate (successful in hitting the target). It can also be adroit (skillful or competent). An archery shot is adroit only if, as the arrow leaves the bow, it is oriented well and powerfully enough.

A shot’s aptness requires that its success be attained not just by luck (such as the luck of that second gust). The success must rather be a result of competence.

we can generalize from this example, to give an account of a fully successful attempt of any sort. Any attempt will have a distinctive aim and will thus be fully successful only if it succeeds not only adroitly but also aptly.

We need people to be willing to affirm things publicly. And we need them to be sincere (by and large) in doing so, by aligning public affirmation with private judgment. Finally, we need people whose assertions express what they actually know.

Aristotle in his “Nicomachean Ethics” developed an AAA account of attempts to lead a flourishing life in accord with fundamental human virtues (for example, justice or courage). Such an approach is called virtue ethics.

a fully successful attempt is good overall only if the agent’s goal is good enough. An attempt to murder an innocent person is not good even if it fully succeeds.

Virtue epistemology begins by recognizing assertions or affirmations.

A particularly important sort of affirmation is one aimed at attaining truth, at getting it right

All it takes for an affirmation to be alethic is that one of its aims be: getting it right.

Humans perform acts of public affirmation in the endeavor to speak the truth, acts with crucial importance to a linguistic species. We need such affirmations for activities of the greatest import for life in society: for collective deliberation and coordination, and for the sharing of information.

Since there is much truth that must be grasped if one is to flourish, some philosophers have begun to treat truth’s apt attainment as virtuous in the Aristotelian sense, and have developed a virtue epistemology

Virtue epistemology gives an AAA account of knowledge: to know affirmatively is to make an affirmation that is accurate (true) and adroit (which requires taking proper account of the evidence). But in addition, the affirmation must be apt; that is, its accuracy must be attributable to competence rather than luck.

Requiring knowledge to be apt (in addition to accurate and adroit) reconfigures epistemology as the ethics of belief.

as a bonus, it allows contemporary virtue epistemology to solve our Gettier problem. We now have an explanation for why you fail to know that someone in the cafe owns a Bentley, when your own Bentley has been destroyed by a bomb, but the barista happens to own one. Your belief in that case falls short of knowledge for the reason that it fails to be apt. You are right that someone in the cafe owns a Bentley, but the correctness of your belief does not manifest your cognitive or epistemic competence. You are right only because by epistemic luck the barista happens to own one.

When in your musings you affirm to yourself that someone in the cafe owns a Bentley, therefore, your affirmation is not an apt alethic affirmation, and hence falls short of knowledge.

If Spotify is right about our increasing willingness to try new stuff — and critics who follow the pop charts said it may be — the trend could upend how we think about music.

Until recently, because of the narrowcasting ethos of terrestrial radio, music was fiercely segregated by genre. In an era less bound by those niches and instead dominated by an online free-for-all, we may discover new artists more quickly than in the past — though, on the other side of the coin, we may also develop less fierce attachments to certain artists, flitting, as my children do, between anything and everything. For better or worse, streaming services may turn us into cultural nomads.

By suggesting tracks based on my activities and parts of the day, I found the service exposed me to music out of my comfort zone.

Programmers for radio stations also look at these services to decide what to add to their rotations.

“These were all songs that were different from what radio was playing, and radio tends to be a homogeneous medium,” Mr. Molanphy said.

“They speed up and slow down, rock their north pole towards the planet and back again and maybe even reverse direction,” said Hamilton. “It would be a pretty confusing system to be in.”

The findings, published in the journal Nature, were based on ten years of observations of Pluto from the Hubble space telescope, which the researchers re-analysed after the relatively recent discovery of the four small moons

Arguments about what is most important for students to know prevent academic disciplines from ossifying. There may well be books or scholars that tradition has overlooked and are deserving of a place on the curriculum. Such debates throw open the question of how and why academic judgements are made; in so doing, they also expose the tyranny of identity politics within today’s universities.

Knowledge itself is increasingly viewed not as objective, but as ideologically loaded and representative of the perspectives of a dominant ruling elite. The problem, academic activists argue, is that not only are philosophers such as Mill, Nietzsche and Kant white men, but their work also reflects a worldview that is exclusive to white men and has little to offer anyone else. Within a couple of centuries, criticism of philosophy has moved from a focus on what philosophers think to who they are.

But that is exactly what Mr. Grinda did. He moved out of the Bedford house in December 2012, ditched the city apartment and got rid of the McLaren. He donated clothes, sports equipment and kitchen utensils to the Church of St. Francis Xavier in Lower Manhattan. He gave his furniture to Housing Works and he packed a Tumi carry-on suitcase with 50 items, including two pairs of jeans, a bathing suit and 10 pairs of socks.

Once he realized his days as a roving houseguest were numbered, Mr. Grinda decided to shift his approach: He kept traveling, but now he was renting apartments on Airbnb or staying in luxury hotels.

Born in suburban Paris in 1974, Mr. Grinda graduated from Princeton in 1996 with a degree in economics. He worked as a consultant at McKinsey & Company for two years before moving back to France to found an online auction start-up funded by the business magnate Bernard Arnault, which Mr. Grinda sold in 2000.He returned to the United States, where he co-founded Zingy, a mobile phone ringtone and game maker, which fetched $80 million in a 2004 sale. After that, he was a founder of OLX, a Craigslist-like service that has become one of the largest global classified websites.Now he is an entrepreneur and angel investor, with more than 200 investments to date, who visits start-ups in Berlin, Paris, New York, San Francisco and other cities.

He looks (and acts) something like Sheldon Cooper, the oddball science geek played by Jim Parsons on “The Big Bang Theory,” an observation Mr. Grinda himself has made.“Friends, who knew me in my late teens and early twenties, would tell you I had exactly the same delusional sense of self-worth and condescending and arrogant self-centered worldview,” he wrote in a blog post that noted his similarities to the sitcom character.

In all, Mr. Grinda said, he stayed with about 15 friends and family members in the first months of 2013. “Everyone was, like, ‘It’s a great idea. Come over,’ ” Mr. Grinda said. “The problem is, the idea of ‘Great, come over’ and me there 24 hours a day, seven days a week, is very different. Especially when their lives are not in sync with mine.”

“When I looked back at the things that mattered the most to me,” he said, “they were experiences, friendships and family — none of which I had invested much in, partly because I was too busy, and partly because I felt anchored by my possessions.”

He hatched a new plan: His friends and family members would come to him.“Rather than me going to them and disrupting their routine,” he said, “getting everyone together in a setting of vacation makes more sense.”

He invited his parents, his friends, their partners, children and nannies for a two-week stay in Anguilla, an island east of Puerto Rico, where he rented two conjoining houses, at a cost of $240,000, with chefs and full house service (and a total of 19 bedrooms).

Mr. Grinda forgot to consider that not everyone lives as he does.For one thing, he had scheduled the Anguilla vacation during the school year, which meant friends with children couldn’t make it. The island’s remoteness, furthermore, meant some guests were forced to endure a tangle of flight connections, leaving some of them exhausted by the time they arrived.And many of the people he invited, who had jobs and other obligations, could stay only for a long weekend.

Mr. Grinda said he has learned a lot from his very big downgrade. He reconnected with old friends, even if it meant annoying them a little, and he rekindled his relationship with his father.“We spent time talking about his life,” he said. And he is no longer against the idea of having a fixed address; he said he is now in negotiations to buy a two-bedroom apartment on the Lower East Side, which he plans to rent out when he is not in town.

Still, the experiment has taken its toll. “The philosophy is interesting,” he said. “But how do you put it into practice? How do you make it real?”

He recently split up with Otilia Aionesei, a former model who works at technology start-up, whom he had been dating, off and on, for two years. The sticking point was their lack of a shared home.“If you want to be his girlfriend, this is the life you have to lead,” Ms. Aionesei said. “I like simple things, to watch movies on the same couch.”Mr. Grinda had a different view. “We went to the Galápagos,” he said. “We went to Tulum. To St. Barts. We have these wonderful experiences and memories together.”

“My home is where I am,” he said. “And it doesn’t matter if it is a friend’s place or a couch or the middle of the jungle or a hotel room on the Lower East Side. But I realize that most of humanity, especially women, don’t see it that way.”

can be accurate (successful in hitting the target). It can also be adroit (skillful or competent). An archery shot is adroit only if, as the arrow leaves the bow, it is oriented well and powerfully enough. But a shot that is both accurate and adroit can still fall short.

fully successful attempt is good overall only if the agent’s goal is good enough. An attempt to murder an innocent person is not good even if it fully succeeds.

affirmation is one aimed at attaining truth, at getting it right

Virtue epistemology begins by recognizing assertions or affirmations

Virtue epistemology gives an AAA account of knowledge: to know affirmatively is to make an affirmation that is accurate (true) and adroit (which requires taking proper account of the evidence).

Requiring knowledge to be apt (in addition to accurate and adroit) reconfigures epistemology as the ethics of belief.

We now have an explanation for why you fail to know that someone in the cafe owns a Bentley, when your own Bentley has been destroyed by a bomb, but the barista happens to own one. Your belief in that case falls short of knowledge for the reason that it fails to be apt. You are right that someone in the cafe owns a Bentley, but the correctness of your belief does not manifest your cognitive or epistemic competence. You are right only because by epistemic luck the barista happens to own one.

In a practical, immediate way, one sees the limits of the so-called “extended mind” clearly in the mob-made Wikipedia, the perfect product of that new vast, supersized cognition: when there’s easy agreement, it’s fine, and when there’s widespread disagreement on values or facts, as with, say, the origins of capitalism, it’s fine, too; you get both sides. The trouble comes when one side is right and the other side is wrong and doesn’t know it. The Shakespeare authorship page and the Shroud of Turin page are scenes of constant conflict and are packed with unreliable information. Creationists crowd cyberspace every bit as effectively as evolutionists, and extend their minds just as fully. Our trouble is not the over-all absence of smartness but the intractable power of pure stupidity, and no machine, or mind, seems extended enough to cure that.

“The medium does matter,” Carr has written. “As a technology, a book focuses our attention, isolates us from the myriad distractions that fill our everyday lives. A networked computer does precisely the opposite. It is designed to scatter our attention. . . . Knowing that the depth of our thought is tied directly to the intensity of our attentiveness, it’s hard not to conclude that as we adapt to the intellectual environment of the Net our thinking becomes shallower.”

when people struggle to describe the state that the Internet puts them in they arrive at a remarkably familiar picture of disassociation and fragmentation. Life was once whole, continuous, stable; now it is fragmented, multi-part, shimmering around us, unstable and impossible to fix.

The odd thing is that this complaint, though deeply felt by our contemporary Better-Nevers, is identical to Baudelaire’s perception about modern Paris in 1855, or Walter Benjamin’s about Berlin in 1930, or Marshall McLuhan’s in the face of three-channel television (and Canadian television, at that) in 1965.

If all you have is a hammer, the saying goes, everything looks like a nail; and, if you think the world is broken, every machine looks like the hammer that broke it.

Blair argues that the sense of “information overload” was not the consequence of Gutenberg but already in place before printing began.

Anyway, the crucial revolution was not of print but of paper: “During the later Middle Ages a staggering growth in the production of manuscripts, facilitated by the use of paper, accompanied a great expansion of readers outside the monastic and scholastic contexts.” For that matter, our minds were altered less by books than by index slips. Activities that seem quite twenty-first century, she shows, began when people cut and pasted from one manuscript to another; made aggregated news in compendiums; passed around précis. “Early modern finding devices” were forced into existence: lists of authorities, lists of headings.

The book index was the search engine of its era, and needed to be explained at length to puzzled researchers—as, for that matter, did the Hermione-like idea of “looking things up.” That uniquely evil and necessary thing the comprehensive review of many different books on a related subject, with the necessary oversimplification of their ideas that it demanded, was already around in 1500, and already being accused of missing all the points.

at any given moment, our most complicated machine will be taken as a model of human intelligence, and whatever media kids favor will be identified as the cause of our stupidity. When there were automatic looms, the mind was like an automatic loom; and, since young people in the loom period liked novels, it was the cheap novel that was degrading our minds. When there were telephone exchanges, the mind was like a telephone exchange, and, in the same period, since the nickelodeon reigned, moving pictures were making us dumb. When mainframe computers arrived and television was what kids liked, the mind was like a mainframe and television was the engine of our idiocy. Some machine is always showing us Mind; some entertainment derived from the machine is always showing us Non-Mind.

What we live in is not the age of the extended mind but the age of the inverted self. The things that have usually lived in the darker recesses or mad corners of our mind—sexual obsessions and conspiracy theories, paranoid fixations and fetishes—are now out there: you click once and you can read about the Kennedy autopsy or the Nazi salute or hog-tied Swedish flight attendants. But things that were once external and subject to the social rules of caution and embarrassment—above all, our interactions with other people—are now easily internalized, made to feel like mere workings of the id left on its own.

A social network is crucially different from a social circle, since the function of a social circle is to curb our appetites and of a network to extend them.

And so the peacefulness, the serenity that we feel away from the Internet, and which all the Better-Nevers rightly testify to, has less to do with being no longer harried by others than with being less oppressed by the force of your own inner life. Shut off your computer, and your self stops raging quite as much or quite as loud.

Now television is the harmless little fireplace over in the corner, where the family gathers to watch “Entourage.” TV isn’t just docile; it’s positively benevolent. This makes you think that what made television so evil back when it was evil was not its essence but its omnipresence. Once it is not everything, it can be merely something. The real demon in the machine is the tirelessness of the user.

the Internet screen has always been like the palantír in Tolkien’s “Lord of the Rings”—the “seeing stone” that lets the wizards see the entire world. Its gift is great; the wizard can see it all. Its risk is real: evil things will register more vividly than the great mass of dull good. The peril isn’t that users lose their knowledge of the world. It’s that they can lose all sense of proportion. You can come to think that the armies of Mordor are not just vast and scary, which they are, but limitless and undefeatable, which they aren’t.

let him develop the habit of smiling any time he starts feeling rotten. Believe it or not, it works.

His theory draws upon many of the most prominent views of how humans emerged. These range from our evolution of the ability to run long distances to our development of the earliest weapons, which involved the improvement of hand-eye coordination. Dramatic climate change in Africa over the course of a few tens of thousands of years also may have forced Australopithecus and Homo to adapt rapidly. And over roughly the same span, humans became cooperative hunters and serious meat eaters, vastly enriching our diet and favoring the development of more-robust brains. By themselves, Wilson says, none of these theories is satisfying. Taken together, though, all of these factors pushed our immediate prehuman ancestors toward what he called a huge pre-adaptive step: the formation of the earliest communities around fixed camps.

“When humans started having a camp—and we know that Homo erectus had campsites—then we know they were heading somewhere,” he told me. “They were a group progressively provisioned, sending out some individuals to hunt and some individuals to stay back and guard the valuable campsite. They were no longer just wandering through territory, emitting calls. They were on long-term campsites, maybe changing from time to time, but they had come together. They began to read intentions in each other’s behavior, what each other are doing. They started to learn social connections more solidly.”

“The humans become consistent with all the others,” he said, and the evolutionary steps were likely similar—beginning with the formation of groups within a freely mixing population, followed by the accumulation of pre-adaptations that make eusociality more likely, such as the invention of campsites. Finally comes the rise to prevalence of eusocial alleles—one of two or more alternative forms of a gene that arise by mutation, and are found at the same place on a chromosome—which promote novel behaviors (like communal child care) or suppress old, asocial traits. Now it is up to geneticists, he adds, to “determine how many genes are involved in crossing the eusociality threshold, and to go find those genes.”

Wilson posits that two rival forces drive human behavior: group selection and what he calls “individual selection”—competition at the level of the individual to pass along one’s genes—with both operating simultaneously. “Group selection,” he said, “brings about virtue, and—this is an oversimplification, but—individual selection, which is competing with it, creates sin. That, in a nutshell, is an explanation of the human condition.

“Within groups, the selfish are more likely to succeed,” Wilson told me in a telephone conversation. “But in competition between groups, groups of altruists are more likely to succeed. In addition, it is clear that groups of humans proselytize other groups and accept them as allies, and that that tendency is much favored by group selection.” Taking in newcomers and forming alliances had become a fundamental human trait, he added, because “it is a good way to win.”

If Wilson is right, the human impulse toward racism and tribalism could come to be seen as a reflection of our genetic nature as much as anything else—but so could the human capacity for altruism, and for coalition- and alliance-building. These latter possibilities may help explain Wilson’s abiding optimism—about the environment and many other matters. If these traits are indeed deeply written into our genetic codes, we might hope that we can find ways to emphasize and reinforce them, to build problem-solving coalitions that can endure, and to identify with progressively larger and more-inclusive groups over time.