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What was Mr. Rubio’s complaint about science teaching? That it might undermine children’s faith in what their parents told them to believe.

What accounts for this pattern of denial? Earlier this year, the science writer Chris Mooney published “The Republican Brain,” which was not, as you might think, a partisan screed. It was, instead, a survey of the now-extensive research linking political views to personality types. As Mr. Mooney showed, modern American conservatism is highly correlated with authoritarian inclinations — and authoritarians are strongly inclined to reject any evidence contradicting their prior beliefs

it’s not symmetric. Liberals, being human, often give in to wishful thinking — but not in the same systematic, all-encompassing way.

We are, after all, living in an era when science plays a crucial economic role. How are we going to search effectively for natural resources if schools trying to teach modern geology must give equal time to claims that the world is only 6.000 years old? How are we going to stay competitive in biotechnology if biology classes avoid any material that might offend creationists?

then there’s the matter of using evidence to shape economic policy. You may have read about the recent study from the Congressional Research Service finding no empirical support for the dogma that cutting taxes on the wealthy leads to higher economic growth. How did Republicans respond? By suppressing the report. On economics, as in hard science, modern conservatives don’t want to hear anything challenging their preconceptions — and they don’t want anyone else to hear about it, either.

“Good” artists instinctively exclude elements of what they know to be part of real life if they feel it may be “bad,” artistically speaking. The prudish Victorians regarded sexual language in fiction that way. Charles Dickens, obviously, knew that people have sex, but he would never spell such a thing out in a novel, even though he knew dirty language was part of real life (especially among the lowlifes he sometimes wrote about, like Fagin and company). It was “bad.” It may have been “bad” in a different sense—as in indecent, improper—but it was “bad” artistically as well, in that his sense of his audience kept him from being too graphic or explicit, either in scenes or dialogue. Meanwhile, Dickens was at liberty to engineer a scene in which, say, a tuberculosis-stricken orphan switches places at the guillotine with a virginal seamstress. Today, you can put all sorts of explicit sexual references in fiction, and the average critic won’t chide you for immorality or indecency; sentimentality will get you panned every time.

The critical temperament of an age shapes an age’s creativity not just in the supply-demand way, motivating writers to produce what is praised and valued by critics and readers. The critical temperament actually blocks off areas of life to create a portrayal of the world that fits its idea of the world. So a prudish era like the Victorian will target immorality—and a cynical or ironic era like ours will target sentimentality.

While it’s somewhat reassuring that almost half the US stories (41 percent) tried, to varying degrees, to rebut the vaccine-autism connection, the study raises the problem of “objectivity” in stories for which a preponderance of evidence is on one side of a “debate.” In such cases, “balanced” coverage can be irresponsible, because it suggests a controversy where none really exists. (Think climate change, and how such he-said-she-said coverage helped sustain the illusion of a genuine debate within the science community.)

A follow-up study by Clarke and Graham Dixon, published in November 2012, makes this point. The two scholars assigned 320 undergrads to read either a “balanced” article or one that was one-sided for or against a link between vaccines and autism. Those students who read the “balanced” articles were far more likely to believe that a link existed than those who read articles that said no link exits.

Today, people who worry that childhood inoculations trigger autism prefer to be described as “vaccine-hesitant,” rather than “anti-vaccine,” and think the CDC’s immunization schedule “overwhelms” kids’ immune systems. This rhetorical shift is illustrates how those who claim a link exists keep moving the goalposts.

Over the course of many generations, the gene pool thickens with helpful alleles until—voila!—the overwhelming number of these alleles are helpful and learners guesses are so uncannily accurate as to seem instinctual. Makes sense, no? But now consider that languages change. (And in the real world they do—quickly.) If the language’s principles switch often, many of those helpfully biased alleles are suddenly not so helpful at all. For fast-changing languages, the model finds, neutral alleles win out:

when the language is programmed to hardly mutate at all, the genes have a chance to adapt to the new language. The two populations become genetically distinct, their alleles heavily biased toward the idiosyncrasies of their local language—precisely what we don’t see in the real world

when the language is programmed to change quickly, neutral alleles are again favored.

maybe our brains couldn’t have evolved to handle language’s more arbitrary properties, because languages never stay the same and, as far as we know, they never have. What goes unspoken here is that the simulations seem to suggest that truly universal properties—such as language’s hierarchical nature—could have been encoded in our brains.

Mr. Cantor’s support for medical research is curiously limited. He’s all for developing new treatments, but he and his colleagues have adamantly opposed “comparative effectiveness research,” which seeks to determine how well such treatments work.

, Hillary Clinton said of her Republican critics, “They just will not live in an evidence-based world.”

in his home state of Virginia — have engaged in furious witch hunts against scientists who find evidence they don’t like. True, the state has finally agreed to study the growing risk of coastal flooding; Norfolk is among the American cities most vulnerable to climate change. But Republicans in the State Legislature have specifically prohibited the use of the words “sea-level rise.”

the parties aren’t just divided on values and policy views, they’re divided over epistemology. One side believes, at least in principle, in letting its policy views be shaped by facts; the other believes in suppressing the facts if they contradict its fixed beliefs.

while Democrats, being human, often read evidence selectively and choose to believe things that make them comfortable, there really isn’t anything equivalent to Republicans’ active hostility to collecting evidence in the first place.

for all the talk of reforming and reinventing the G.O.P., the ignorance caucus retains a firm grip on the party’s heart and mind.

It would be helpful to these discussions if we had a good grasp of the facts about firearms and violence. But we don’t, because back in the 1990s conservative politicians, acting on behalf of the National Rifle Association, bullied federal agencies into ceasing just about all research into the issue.

There is a high level of political discussion in the editorials and op-eds of national newspapers and magazines as well as on a number of blogs, with positions often carefully formulated and supported with argument and evidence. But even here we seldom see a direct and sustained confrontation of rival positions through the dialectic of assertion, critique, response and counter-critique.

As a result, partisans typically remain safe in their ideological worlds, convincing themselves that they hold to obvious truths, while their opponents must be either knaves or fools — with no need to think through the strengths of their rivals’ positions or the weaknesses of their own.

In the second session, the Republican asks the Democrat a series of questions (no more than one minute per question and three minutes per response) on the debate topic. In the third session, the Democrat questions the Republican. In the fourth session, each side has 15 minutes to present a final argument.

A first condition is that the debates be focused on specific points of major disagreement.

Is there any way to make genuine debates — sustained back-and-forth exchanges, meeting high intellectual standards but still widely accessible — part of our political culture?

Here’s one suggestion for an effective exchange. The debate would consist of a series of four half-hour televised sessions, carried out on successive days. In the first session, the Republican, say, presents a pre-written case for a particular position

Another issue is the medium of the debate. Written discussions, in print or online could be easily arranged, but personal encounters are more vivid and will better engage public attention. They should not, however, be merely extemporaneous events, where too much will depend on quick-thinking and an engaging manner. We want remarks to be carefully prepared and open to considered responses

they will set much higher standards of discussion, requiring fuller explanations of positions and even modifications to make them more defensible. It’s unlikely that either side would ever simply give up its view, but, politically, they would have to react to a strong public consensus if they had not made a respectable case. Further, the quasi-official status of the participants, as representatives chosen by their parties, would make the parties’ politicians answerable to points the representatives have made.

The only major obstacle to implementing this proposal would be getting the parties to participate. Here, I suggest, shame would be a prime motivator.

Facts and reasoning will never settle political issues. All of us have fundamental commitments that are impervious to argument

But rationality almost always has some role in our decisions, and more rationality in our political discussion will at a minimum help many to better understand what is at stake in our disputes and why their opponents think as they do.

So why not give reason a chance?

Fifty Republican national-security experts signed an open letter declaring Trump a danger to the republic; several staffers quit the Republican National Committee rather than work to elect Trump. Allegiances have been sundered, and professional trajectories thrown into confusion.

Several Republicans I know, finding the campaign intolerable, have rediscovered old hobbies.

Although he was originally drawn to the party for its emphasis on economic freedom and self-reliance, he now believes that a substantial portion of Republicans were never motivated by those ideas. Rather than a conservative party that happens to incorporate cultural grievances, today’s GOP is, in his view, a vehicle for the racial resentment, nationalism, and nostalgia of older white voters.

Trump is the “logical end point” of the GOP’s long history of racialized politics.

if I think that simply explaining the facts to the other side is going to change their mind, then I’m in for a rude awakening.

As a philosopher, I found to be somewhat more disturbing the idea that denialism isn’t even about critical thinking.

what the large variety of denialisms have in common is a very strong, overwhelming, ideological commitment that helps define the denialist identity in a core manner. This commitment can be religious, ethnical or political in nature, but in all cases it fundamentally shapes the personal identity of the people involved, thus generating a strong emotional attachment, as well as an equally strong emotional backlash against critics.

To begin with, of course, they think of themselves as “skeptics,” thus attempting to appropriate a word with a venerable philosophical pedigree and which is supposed to indicate a cautiously rational approach to a given problem. As David Hume put it, a wise person (i.e., a proper skeptic) will proportion her beliefs to the evidence. But there is nothing of the Humean attitude in people who are “skeptical” of evolution, climate change, vaccines, and so forth.

Denialists have even begun to appropriate the technical language of informal logic: when told that a majority of climate scientists agree that the planet is warming up, they are all too happy to yell “argument from authority!” When they are told that they should distrust statements coming from the oil industry and from “think tanks” in their pockets they retort “genetic fallacy!” And so on. Never mind that informal fallacies are such only against certain background information, and that it is eminently sensible and rational to trust certain authorities (at the least provisionally), as well as to be suspicious of large organizations with deep pockets and an obvious degree of self-interest.

What commonalities can we uncover across instances of denialism that may allow us to tackle the problem beyond facts and elementary logic?

the evidence from the literature is overwhelming that denialists have learned to use the vocabulary of critical thinking against their opponents.

Another important issue to understand is that denialists exploit the inherently tentative nature of scientific or historical findings to seek refuge for their doctrines.

. Scientists have been wrong before, and doubtlessly will be again in the future, many times. But the issue is rather one of where it is most rational to place your bets as a Bayesian updater: with the scientific community or with Faux News?

Science should be portrayed as a human story of failure and discovery, not as a body of barely comprehensible facts arrived at by epistemic priests.

Is there anything that can be done in this respect? I personally like the idea of teaching “science appreciation” classes in high school and college [2], as opposed to more traditional (usually rather boring, both as a student and as a teacher) science instruction

Denialists also exploit the media’s self imposed “balanced” approach to presenting facts, which leads to the false impression that there really are two approximately equal sides to every debate.

This is a rather recent phenomenon, and it is likely the result of a number of factors affecting the media industry. One, of course, is the onset of the 24-hr media cycle, with its pernicious reliance on punditry. Another is the increasing blurring of the once rather sharp line between reporting and editorializing.

The problem with the media is of course made far worse by the ongoing crisis in contemporary journalism, with newspapers, magazines and even television channels constantly facing an uncertain future of revenues,

he push back against denialism, in all its varied incarnations, is likely to be more successful if we shift the focus from persuading individual members of the public to making political and media elites accountable.

This is a major result coming out of Brendan’s research. He showed data set after data set demonstrating two fundamental things: first, large sections of the general public do not respond to the presentation of even highly compelling facts, indeed — as mentioned above — are actually more likely to entrench further into their positions.

Second, whenever one can put pressure on either politicians or the media, they do change their tune, becoming more reasonable and presenting things in a truly (as opposed to artificially) balanced way.

Third, and most crucially, there is plenty of evidence from political science studies that the public does quickly rally behind a unified political leadership. This, as much as it is hard to fathom now, has happened a number of times even in somewhat recent times

when leaders really do lead, the people follow. It’s just that of late the extreme partisan bickering in Washington has made the two major parties entirely incapable of working together on the common ground that they have demonstrably had in the past.

Another thing we can do about denialism: we should learn from the detailed study of successful cases and see what worked and how it can be applied to other instances

Yet another thing we can do: seek allies. In the case of evolution denial — for which I have the most first-hand experience — it has been increasingly obvious to me that it is utterly counterproductive for a strident atheist like Dawkins (or even a relatively good humored one like yours truly) to engage creationists directly. It is far more effective when we have clergy (Barry Lynn of Americans United for the Separation of Church and State [6] comes to mind) and religious scientists

Make no mistake about it: denialism in its various forms is a pernicious social phenomenon, with potentially catastrophic consequences for our society. It requires a rallying call for all serious public intellectuals, academic or not, who have the expertise and the stamina to join the fray to make this an even marginally better world for us all. It’s most definitely worth the fight.

The basic idea seems to be this: If kids who read regularly gain significant benefits, then it should be mandated that all students read regularly so they, too, can enjoy those benefits.

s a psychologist (and a parent), I have long opposed reading logs because of abundant research on the negative effects of external controls (such as rewards, deadlines, and assigned goals) on intrinsic motivation

Until recently, however, there were no formal studies testing whether or not reading logs were actually promoting reading.

The students in the voluntary group were encouraged to read, but teachers emphasized that the reading log was completely optional.

The results? Students assigned the mandatory log showed diminished interest in recreational reading and also more negative attitudes toward reading after the study concluded.

“Reading logs ruined my reader. [My daughter] used to love reading but when it became something she had to do, she stopped doing it for fun and only read as much as the teacher required.”

ompelling children to read may improve their reading skills, which is undeniably important,

but mandated reading does not bring the same benefits as when children themselves choose to read. Worse, it may even diminish their interest in reading at all.

When Nepal hasn't been under the blanket of armed insurgencies, it's been in the grip of corrupt political leaders. People in Nepal seem to be looking for a leader that can carry them out of developmental paralysis, no matter the cost.

The iron law of Darwinian evolution is that everything that exists strives with all its power to reproduce, to extend life into the future, and that every feature of every creature can be explained as an adaptation toward this end. For the artist to deny any connection with the enterprise of life, then, is to assert his freedom from this universal imperative; to reclaim negatively the autonomy that evolution seems to deny to human beings. It is only because we can freely choose our own ends that we can decide not to live for life, but for some other value that we posit. The artist’s decision to produce spiritual offspring rather than physical ones is thus allied to the monk’s celibacy and the warrior’s death for his country, as gestures that deny the empire of mere life.

Animals produce beauty on their bodies; humans can also produce it in their artifacts. The natural inference, then, would be that art is a human form of sexual display, a way for males to impress females with spectacularly redundant creations.

For Darwin, the human sense of beauty was not different in kind from the bird’s.

Still, Darwin recognized that the human sense of beauty was mediated by “complex ideas and trains of thought,” which make it impossible to explain in terms as straightforward as a bird’s:

Put more positively, one might say that any given work of art can be discussed critically and historically, but not deduced from the laws of evolution.

with the rise of evolutionary psychology, it was only a matter of time before the attempt was made to explain art in Darwinian terms. After all, if ethics and politics can be explained by game theory and reciprocal altruism, there is no reason why aesthetics should be different: in each case, what appears to be a realm of human autonomy can be reduced to the covert expression of biological imperatives

Still, there is an unmistakable sense in discussions of Darwinian aesthetics that by linking art to fitness, we can secure it against charges of irrelevance or frivolousness—that mattering to reproduction is what makes art, or anything, really matter.

The first popular effort in this direction was the late Denis Dutton’s much-discussed book The Art Instinct, which appeared in 2009.

Dutton’s Darwinism was aesthetically conservative: “Darwinian aesthetics,” he wrote, “can restore the vital place of beauty, skill, and pleasure as high artistic values.” Dutton’s argument has recently been reiterated and refined by a number of new books,

“The universality of art and artistic behaviors, their spontaneous appearance everywhere across the globe ... and the fact that in most cases they can be easily recognized as artistic across cultures suggest that they derive from a natural, innate source: a universal human psychology.”

Again like language, art is universal in the sense that any local expression of it can be “learned” by anyone.

Yet earlier theorists of evolution were reluctant to say that art was an evolutionary adaptation like language, for the simple reason that it does not appear to be evolutionarily adaptive.

Stephen Jay Gould suggested that art was not an evolutionary adaptation but what he called a “spandrel”—that is, a showy but accidental by-product of other adaptations that were truly functiona

the very words “success” and “failure,” despite themselves, bring an emotive and ethical dimension into the discussion, so impossible is it for human beings to inhabit a valueless world. In the nineteenth century, the idea that fitness for survival was a positive good motivated social Darwinism and eugenics. Proponents of these ideas thought that in some way they were serving progress by promoting the flourishing of the human race, when the basic premise of Darwinism is that there is no such thing as progress or regress, only differential rates of reproduction

In particular, Darwin suggests that it is impossible to explain the history or the conventions of any art by the general imperatives of evolution

Boyd begins with the premise that human beings are pattern-seeking animals: both our physical perceptions and our social interactions are determined by our brain’s innate need to find and to

Art, then, can be defined as the calisthenics of pattern-finding. “Just as animal physical play refines performance, flexibility, and efficiency in key behaviors,” Boyd writes, “so human art refines our performance in our key perceptual and cognitive modes, in sight (the visual arts), sound (music), and social cognition (story). These three modes of art, I propose, are adaptations ... they show evidence of special design in humans, design that offers survival and especially reproductive advantages.”

make coherent patterns

Historians and sociologists of science say that since the tobacco wars of the 1960s, corporations trying to block legislation that hurts their interests have employed a strategy of creating the appearance of scientific doubt, usually with the help of ostensibly independent researchers who accept industry funding.

“The whole doubt-mongering strategy relies on creating the impression of scientific debate,” said Naomi Oreskes, a historian of science at Harvard University and the co-author of “Merchants of Doubt,” a book about such campaigns. “Willie Soon is playing a role in a certain kind of political theater.”

Environmentalists have long questioned Dr. Soon’s work, and his acceptance of funding from the fossil-fuel industry was previously known. But the full extent of the links was not; the documents show that corporate contributions were tied to specific papers and were not disclosed, as required by modern standards of publishing.

“What it shows is the continuation of a long-term campaign by specific fossil-fuel companies and interests to undermine the scientific consensus on climate change,” said Kert Davies, executive director of the Climate Investigations Center, a group funded by foundations seeking to limit the risks of climate change.

Many experts in the field say that Dr. Soon uses out-of-date data, publishes spurious correlations between solar output and climate indicators, and does not take account of the evidence implicating emissions from human behavior in climate change.

Though often described on conservative news programs as a “Harvard astrophysicist,” Dr. Soon is not an astrophysicist and has never been employed by Harvard. He is a part-time employee of the Smithsonian Institution with a doctoral degree in aerospace engineering. He has received little federal research money over the past decade and is thus responsible for bringing in his own funds, including his salary.

Though he has little formal training in climatology, Dr. Soon has for years published papers trying to show that variations in the sun’s energy can explain most recent global warming. His thesis is that human activity has played a relatively small role in causing climate change.

As the oil-industry contributions fell, Dr. Soon started receiving hundreds of thousands of dollars through DonorsTrust, an organization based in Alexandria, Va., that accepts money from donors who wish to remain anonymous, then funnels it to various conservative causes.

Gavin A. Schmidt, head of the Goddard Institute for Space Studies in Manhattan, a NASA division that studies climate change, said that the sun had probably accounted for no more than 10 percent of recent global warming and that greenhouse gases produced by human activity explained most of it.“The science that Willie Soon does is almost pointless,” Dr. Schmidt said.

Dr. Soon has found a warm welcome among politicians in Washington and state capitals who try to block climate action. United States Senator James M. Inhofe, an Oklahoma Republican who claims that climate change is a global scientific hoax, has repeatedly cited Dr. Soon’s work over the years.

Dr. Oreskes, the Harvard science historian, said that academic institutions and scientific journals had been too lax in recent decades in ferreting out dubious research created to serve a corporate agenda.

these patterns match recent political events. In international negotiations, the United States has been less interested in taking steps to slow global warming than many other rich countries. President Obama and a majority of Democrats favored a bill that would have raised the cost of emitting carbon, and such a bill passed the House of Representatives in 2009. Strong opposition from Republicans in the Senate, as well as some Democrats from coal-producing states, defeated the bill there.

But older females who have more offspring, and thus share more of the group’s genes, are more likely to cooperate by sharing food and knowledge.

She believes the primary reason women live so long after menopause is because they help improve the survival of grandchildren, which helps pass their own genes on.

To him, that’s where reproductive conflict comes in. “You have to not only look at the gains, but the costs you would suffer if you continue to breed.”

Combined with a gift for humor, anger lies at the heart of Trump’s charisma.

Users will also be able to report potentially false stories to Facebook or send messages directly to the person posting a questionable article.

The company is focusing, for now, on what Mosseri called the “bottom of the barrel” websites that are purposefully set up to deceive and spread fake news, as well as those that are impersonating other news organizations. “We are not looking to flag legitimate organizations,” Mosseri said. “We’re looking for pages posing as legitimate organizations.” Articles from legitimate sites that are controversial or even wrong should not get flagged, he said.

The company will also prioritize checking stories that are getting lots of flags from users and are being shared widely, to go after the biggest targets possible.

"From a journalistic side, is it enough? It’s a little late.”

Facebook is fine to filter out other content -- such as pornography -- for which the definition is unclear. There's no clear explanation for why Facebook hasn't decided to apply similar filters to fake news. “I think that’s a little weak,” Tu said. “If you recognize that it’s bad and journalists at the AP say it’s bad, you shouldn’t have it on your site.”

Others said Facebook's careful approach may be warranted. "I think we'll have to wait and see early results to determine how effective the strategy is," said Alexios Mantzarlis, of Poynter's International Fact-Checking Network. "In my eyes, erring on the side of caution is not a bad idea with something so complicated," he said

Facebook is also trying to crack down on people who have made a business in fake news by tweaking the social network's advertising practices. Any article that has been disputed, for example, cannot be used in an ad. Facebook is also playing around with ways to limit links from publishers with landing pages that are mostly ads — a common tactic for fake-news websites

With those measures in place, “we’re hoping financially motivated spammers might move away from fake news,” Mosseri said

Paul Horner, a fake news writer who makes a living writing viral hoaxes, said he wasn't immediately worried about Facebook's new crackdown on fake news sites. "It's really easy to start a new site. I have 50 domain names. I have a dedicated server. I can start up a new site within 48 hours," he said, shortly after Facebook announced its new anti-hoax programs.  If his sites, which he describes as "satire"-focused, do end up getting hit too hard, Horner says he has "backup plans."

it helped shift moral psychology away from rationalist models that dominated in the 1980s and 1990s. In its place Haidt offered an understanding of morality from an intuitive and automatic level. As Haidt says on his website, “we are just not very good at thinking open-mindedly about moral issues, so rationalist models end up being poor descriptions of actual moral psychology.”

“the mind is divided into parts that sometimes conflict. Like a rider on the back of an elephant, the conscious, reasoning part of the mind has only limited control of what the elephant does.”

In the last few decades psychology began to understand the unconscious mind not as dark and suppressed as Freud did, but as intuitive, highly intelligent and necessary for good conscious reasoning. “Elephants,” he reminded me, “are really smart, much smarter than horses.”

we are 90 percent chimp 10 percent bee. That is to say, though we are inherently selfish, human nature is also about being what he terms “groupish.” He explained to me like this:

they developed the idea that humans possess six universal moral modules, or moral “foundations,” that get built upon to varying degrees across culture and time. They are: Care/harm, Fairness/cheating, Loyalty/betrayal, Authority/subversion, Sanctity/degradation, and Liberty/oppression. Haidt describes these six modules like a “tongue with six taste receptors.” “In this analogy,” he explains in the book, “the moral matrix of a culture is something like its cuisine: it’s a cultural construction, influenced by accidents of environment and history, but it’s not so flexible that anything goes. You can’t have a cuisine based on grass and tree bark, or even one based primarily on bitter tastes. Cuisines vary, but they all must please tongues equipped with the same five taste receptors. Moral matrices vary, but they all must please righteous minds equipped with the same six social receptors.”

The questionnaire eventually manifested itself into the website www.YourMorals.org, and it has since gathered over two hundred thousand data points. Here is what they found:

This is the crux of the disagreement between liberals and conservatives. As the graph illustrates, liberals value Care and Fairness much more than the other three moral foundations whereas conservative endorse all five more or less equally. This shouldn’t sound too surprising, liberals tend to value universal rights and reject the idea of the United States being superior while conservatives tend to be less concerned about the latest United Nation declaration and more partial to the United States as a superior nation.

Haidt began reading political psychology. Karen Stenner’s The Authoritarian Dynamic, “conveyed some key insights about protecting the group that were particularly insightful,” he said. The work of the French sociologist Emile Durkheim was also vital. In contrast to John Stuart Mill, a Durkheimian society, as Haidt explains in an essay for edge.org, “would value self-control over self-expression, duty over rights, and loyalty to one’s groups over concerns for out-groups.”

He was motivated to write The Righteous Mind after Kerry lost the 2004 election: “I thought he did a terrible job of making moral appeals so I began thinking about how I could apply moral psychology to understand political divisions. I started studying the politics of culture and realized how liberals and conservatives lived in their own closed worlds.” Each of these worlds, as Haidt explains in the book, “provides a complete, unified, and emotionally compelling worldview, easily justified by observable evidence and nearly impregnable to attack by arguments from outsiders.” He describes them as “moral matrices,” and thinks that moral psychology can help him understand them.

“When I say that human nature is selfish, I mean that our minds contain a variety of mental mechanisms that make us adept at promoting our own interests, in competition with our peers. When I say that human nature is also groupish, I mean that our minds contain a variety of mental mechanisms that make us adept at promoting our group’s interests, in competition with other groups. We are not saints, but we are sometimes good team players.” This is what people who had studied morality had not realized, “that we evolved not just so I can treat you well or compete with you, but at the same time we can compete with them.”

At first, Haidt reminds us that we are all trapped in a moral matrix where

our “elephants” only look for what confirms its moral intuitions while our “riders” play the role of the lawyer; we team up with people who share similar matrices and become close-minded; and we forget that morality is diverse. But on the other hand, Haidt is offering us a choice: take the blue pill and remain happily delusional about your worldview, or take the red pill, and, as he said in his 2008 TED talk, “learn some moral psychology and step outside your moral matrix.”

The great Asian religions, Haidt reminded the crowd at TED, swallowed their pride and took the red pill millennia ago. And by stepping out of their moral matrices they realized that societies flourish when they value all of the moral foundations to some degree. This is why Ying and Yang aren’t enemies, “they are both necessary, like night and day, for the functioning of the world.” Or, similarly, why the two of the high Gods in Hinduism, Vishnu the preserver (who stands for conservative principles) and Shiva the destroyer (who stands for liberal principles) work together.

Students sometimes argue that their talents have improved so dramatically that they are deserving of higher grades. Past studies, however, have found little evidence of this.

While it’s true that top schools have become more selective, the overall universe of students attending college has gotten broader, reflecting a wider distribution of abilities and levels of preparation, especially at the bottom. College students today also study less and do not appear to be more literate than their predecessors were.

Plus, of course, even if students have gotten smarter, or at least more efficient at studying (hey, computers do help), grades are arguably also supposed to measure relative achievement among classmates.

Affirmative action also sometimes gets blamed for rising grades; supposedly, professors have been loath to hurt the feelings of underprepared minority students. Rojstaczer and Healy note, however, that much of the increase in minority enrollment occurred from the mid-1970s to mid-’80s, the only period in recent decades when average GPAs fell.

That first era, the researchers say, can be explained by changes in pedagogical philosophy (some professors began seeing grades as overly authoritarian and ineffective at motivating students) and mortal exigencies (male students needed higher grades to avoid the Vietnam draft).

The authors attribute today’s inflation to the consumerization of higher education. That is, students pay more in tuition, and expect more in return — better service, better facilities and better grades. Or at least a leg up in employment and graduate school admissions through stronger transcripts.

some universities have explicitly lifted their grading curves (sometimes retroactively) to make graduates more competitive in the job market, leading to a sort of grade inflation arms race

But rising tuition may not be the sole driver of students’ expectations for better grades, given that high school grades have also risen in recent decades. And rather than some top-down directive from administrators, grade inflation also seems related to a steady creep of pressure on professors to give higher grades in exchange for better teaching evaluations.

It’s unclear how the clustering of grades near the top is affecting student effort. But it certainly makes it harder to accurately measure how much students have learned. It also makes it more challenging for grad schools and employers to sort the superstars from the also-rans

Lax or at least inconsistent grading standards can also distort what students — especially women — choose to study, pushing them away from more stingily graded science, technology, engineering and math fields and into humanities, where high grades are easier to come by.

Without collective action — which means both standing up to students and publicly shaming other schools into adopting higher standards — the arms race will continue.

He calls these expansions of meaning “concept creep.”

critics may hold concept creep responsible for damaging cultural trends, he writes, “such as supposed cultures of fear, therapy, and victimhood, the shifts I present have some positive implications.”

Concept creep is inevitable and vital if society is to make good use of new information. But why has the direction of concept creep, across so many different concepts, trended toward greater sensitivity to harm as opposed to lesser sensitivity?

The concept of abuse expanded too far.

Classically, psychological investigations recognized two forms of child abuse, physical and sexual, Haslam writes. In more recent decades, however, the concept of abuse has witnessed “horizontal creep” as new forms of abuse were recognized or studied. For example, “emotional abuse” was added as a new subtype of abuse. Neglect, traditionally a separate category, came to be seen as a type of abuse, too.

Meanwhile, the concept of abuse underwent “vertical creep.” That is, the behavior seen as qualifying for a given kind of abuse became steadily less extreme. Some now regard any spanking as physical abuse. Within psychology, “the boundary of neglect is indistinct,” Haslam writes. “As a consequence, the concept of neglect can become over-inclusive, identifying behavior as negligent that is substantially milder or more subtle than other forms of abuse. This is not to deny that some forms of neglect are profoundly damaging, merely to argue that the concept’s boundaries are sufficiently vague and elastic to encompass forms that are not severe.”

How did a working-class mom get arrested, lose her fast food job, and temporarily lose custody of her 9-year-old for letting the child play alone at a nearby park?

One concerns the field of psychology and its incentives. “It could be argued that just as successful species increase their territory, invading and adapting to new habitats, successful concepts and disciplines also expand their range into new semantic niches,” he theorizes. “Concepts that successfully attract the attention of researchers and practitioners are more likely to be applied in new ways and new contexts than those that do not.”

Concept creep can be necessary or needless. It can align concepts more or less closely with underlying realities. It can change society for better or worse. Yet many who push for more sensitivy to harm seem unaware of how oversensitivty can do harm.

The other theory posits an ideological explanation. “Psychology has played a role in the liberal agenda of sensitivity to harm and responsiveness to the harmed,” he writes “and its increased focus on negative phenomena—harms such as abuse, addiction, bullying, mental disorder, prejudice, and trauma—has been symptomatic of the success of that social agenda.”

Jonathan Haidt, who believes it has gone too far, offers a fourth theory. “If an increasingly left-leaning academy is staffed by people who are increasingly hostile to conservatives, then we can expect that their concepts will shift, via motivated scholarship, in ways that will help them and their allies (e.g., university administrators) to prosecute and condemn conservatives,

While Haslam and Haidt appear to have meaningfully different beliefs about why concept creep arose within academic psychology and spread throughout society, they were in sufficient agreement about its dangers to co-author a Guardian op-ed on the subject.

It focuses on how greater sensitivity to harm has affected college campuses.

“Of course young people need to be protected from some kinds of harm, but overprotection is harmful, too, for it causes fragility and hinders the development of resilience,” they wrote. “As Nasim Taleb pointed out in his book Antifragile, muscles need resistance to develop, bones need stress and shock to strengthen and the growing immune system needs to be exposed to pathogens in order to function. Similarly, he noted, children are by nature anti-fragile – they get stronger when they learn to recover from setbacks, failures and challenges to their cherished ideas.”

police officers fearing harm from dogs kill them by the hundreds or perhaps thousands every year in what the DOJ calls an epidemic.

After the terrorist attacks of September 11, 2001, the Bush Administration and many Americans grew increasingly sensitive to harms, real and imagined, from terrorism

Dick Cheney declared, “If there's a 1% chance that Pakistani scientists are helping al-Qaeda build or develop a nuclear weapon, we have to treat it as a certainty in terms of our response. It's not about our analysis ... It's about our response.” The invasion of Iraq was predicated, in part, on the idea that 9/11 “changed everything,”

Before 9/11, the notion of torturing prisoners was verboten. After the Bush Administration’s torture was made public, popular debate focused on mythical “ticking time bomb” scenarios, in which a whole city would be obliterated but for torture. Now Donald Trump suggests that torture should be used more generally against terrorists. Torture is, as well, an instance in which people within the field of psychology pushed concept creep in the direction of less sensitivity to harm,

Haslam endorses two theories

there are many reasons to be concerned about excessive sensitivity to harm: