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But that blessed feeling evaporated in June of 2019, when I lost my daughter, Frankie, to suicide, three weeks before her high school graduation

Ever since that day, I have thought of little else except how I could help the next struggling teenager, the next Frankie.

Several days after her passing, we opened our home up to our community, including Frankie’s very large group of teenage friends

“What strength Frankie had. It must have taken enormous energy for her to do what she did each day.”

That was Frankie. She had the strength to engage in school and in theater, despite her anxiety and depression. She had an ability to connect — emotionally, profoundly — with others, even when she was struggling herself

“empathy personified, with quite the fabulous earring collection.”

Whether that strength came from her home or somewhere else, or both, Frankie just had a way of drawing out warmth wherever she went.

Just as my parents couldn’t predict in the 1980s what seatbelt safety would look like now, I am not sure what suicide prevention should look like in the future.

Suicidal thinking, whether it is the result of mental illness, stress, trauma or loss, is actually far more common and difficult to see than many of us realize

A June 2020 Centers for Disease Control survey found that one in four 18- to 24-year-olds reported that they had seriously thought about taking their lives in the past 30 days; prepandemic estimates found that just under one in five high schoolers had seriously considered suicide, and just under one in 10 had made at least one suicide attempt during the previous year.

Despite 50 years of research, predicting death by suicide is still nearly impossible

Like others who have lost a child to suicide, I have spent countless hours going over relentless “what ifs.”

Maybe what we need are seatbelts for suicide.

“Click it or Ticket” was born in part out of a concern in the 1980s about teenagers dying in car accidents. Just as with suicides today, adults couldn’t predict who would get into a car accident, and one of the best solutions we had — seatbelts — was used routinely, in some estimates, by only 15 percent of the population. Indeed, as children, my siblings and I used to make a game of rolling around in the back of our car, seatbelts ignored.

Three decades later, our world is unlike anything I could have imagined as a child. Putting on a seatbelt is the first lesson of driver’s education; cars get inspected annually for working seatbelts; car companies embed those annoying beeping sounds to remind you to buckle your seatbelt

But like many who struggle with suicidal thinking, she kept her own pain camouflaged for a long time, perhaps for too long.

Most of us (estimates range as high as 91 percent) now wear a seatbelt.

But I imagine a world in which every health worker, school professional, employer and religious leader can recognize the signs of suicidal thinking and know how to ask about it, respond to it and offer resources to someone who is struggling

When I told Frankie’s orthodontist about her suicide, his response surprised me: “We really don’t come across that in our practice.” Even though orthodontists don’t ask about it, they see children during their early teenage years, when suicidal thinking often begins to emerge. Can you imagine a world in which signs for the prevention hotline and text line are posted for kids to see as they get their braces adjusted?

What if the annual teenage pediatric checkup involved a discussion of one-at-a-time pill packaging and boxes to lock up lethal medications, the way there is a discussion of baby-proofing homes when children start to crawl? What if pediatricians handed each adolescent a card with the prevention hotline on it (or better yet, if companies preprogrammed that number into cellphones) and the pediatrician talked through what happens when a teenager calls? What if doctors coached parents on how to ask their teenager, “Are you thinking about suicide?”

What if we required and funded every school to put in place one of the existing programs that train teachers and other school professionals to be a resource for struggling students?

I recognize that despite progress identifying effective programs to combat suicidal thinking, their success rate and simplicity does not compare with what we see with seatbelts. But that doesn’t mean we shouldn’t do more.

Part of doing more also includes making the world more just and caring. To give one example, state-level same-sex-marriage policies that were in place before the Supreme Court legalized same-sex marriage nationally have been linked to reductions in suicide attempts among adolescents, especially among sexual minorities.

Just as safer highways and car models make seatbelts more effective, asking about and responding to suicidal thinking is only one part of a solution that also includes attention to societal injustices.

I understand, of course, that asking about suicidal thinking is scary. But if it is scary for you to ask about it, it is even scarier for the teenager who is thinking about it.

I will never forget sitting with Frankie in the waiting room in the pediatric psychiatric wing on the night I brought her to the inpatient unit, three months before she took her life

“You know, I am so glad you finally know.” I could hear the relief in her voice. I just nodded, understandingly, but it broke my heart that she held on to such a painful secret for so long.

I find myself inspired by Frankie’s teenage friends, who cared deeply for her and now support one another after her passing.

On good days, she would sit on the worn couch in that office, snuggle in a pile of teenagers and discuss plays, schoolwork and their lives.

And in that corner space, she would text a friend to help her get to class or, after she had opened up about her struggles, encourage others to open up as well.

The fall after Frankie left us, some students decided to remake that hidden corner, dotting the walls with colored Post-it notes. Scrawled on a pink Post-it were the words “you matter”; a yellow one read “it gets better”; an orange one shared a cellphone number to call for help. Tiny Post-it squares had transformed the corner into a space to comfort, heal and support the next struggling teenager.

I don’t know if a seatbelt approach would have saved Frankie. And I understand that all the details of such an approach aren’t fully worked out here. But I don’t want us to lose any more children because we weren’t brave enough to take on something that scares us, something we don’t fully understand, something that is much more prevalent than many of us realize.

If 17- and 18-year-olds who’ve lost a friend have the strength to imagine a world dotted with healing, then the least we can do as adults is design and build the structure to support them

Still, most teenagers said they read the first few sites that popped up in an online search, rather than delving further.

Deb Levine, founder of YTH, a company that works with many organizations to create health applications, said that teenagers do not search online the way adults do, which contributes to the uneven quality of the information they receive.

Teenagers take more risks, this new view of the research shows, because risk-taking in adolescence has historically given them an adaptive edge. “Succeeding often requires moving out of the home and into less secure situations.” They prefer the company of other teenagers because they are designed to “invest in the future rather than the past.” And they perceive a social crisis as a threat to their very existence because, on a neural level, “our brains react to peer exclusion much as they respond to threats to physical health or food supply.”

Studies show that when parents engage and guide their teens  with a light but steady hand, staying connected but allowing independence, their kids generally do much better in life. Adolescents want to learn primarily, but not entirely, from their friends. At some level and at some times (and it’s the parent’s job to spot when), the teen  recognizes that the parent can offer certain kernels of wisdom — knowledge valued not because it comes from parental authority, but because it comes from the parent’s own struggles to learn how the world turns.

The brain-development lag has huge implications for how we think about anxiety and how we treat it. It suggests that anxious adolescents may not be very responsive to psychotherapy that attempts to teach them to be unafraid, like cognitive behavior therapy

should also make us think twice — and then some — about the ever rising use of stimulants in young people, because these drugs may worsen anxiety and make it harder for teenagers to do what they are developmentally supposed to do: learn to be unafraid when it is appropriate

up to 20 percent of adolescents in the United States experience a diagnosable anxiety disorder, like generalized anxiety or panic attacks, probably resulting from a mix of genetic factors and environmental influences.

This isn’t to say that cognitive therapy is ineffective for teenagers, but that because of their relative difficulty in learning to be unafraid, it may not be the most effective treatment when used on its own.

Fear learning lies at the heart of anxiety and anxiety disorders. This primitive form of learning allows us to form associations between events and specific cues and environments that may predict danger.

once previously threatening cues or situations become safe, we have to be able to re-evaluate them and suppress our learned fear associations. People with anxiety disorders have trouble doing this and experience persistent fear in the absence of threat — better known as anxiety.

Dr. Casey discovered that adolescents had a much harder time “unlearning” the link between the colored square and the noise than children or adults did.

adolescents had trouble learning that a cue that was previously linked to something aversive was now neutral and “safe.” If you consider that adolescence is a time of exploration when young people develop greater autonomy, an enhanced capacity for fear and a more tenacious memory for threatening situations are adaptive and would confer survival advantage. In fact, the developmental gap between the amygdala and the prefrontal cortex that is described in humans has been found across mammalian species, suggesting that this is an evolutionary advantage.

As a psychiatrist, I’ve treated many adults with various anxiety disorders, nearly all of whom trace the origin of the problem to their teenage years. They typically report an uneventful childhood rudely interrupted by adolescent anxiety. For many, the anxiety was inexplicable and came out of nowhere.

prescription sales for stimulants increased more than fivefold between 2002 and 2012. This is of potential concern because it is well known from both human and animal studies that stimulants enhance learning and, in particular, fear conditioning.

Still, most teenagers said they read the first few sites that popped up in an online search, rather than delving further. The information often did not directly address their concerns or was densely written, they said.

When asked where they got “a lot” of health information, 55 percent of the teenagers cited their parents. School health classes and medical providers also ranked higher than the Internet as preferred sources.

teenagers do not search online the way adults do, which contributes to the uneven quality of the information they receive.

“We should be able to provide kids with better, independent online health resources.”

start with epistemic bubbles

That omission might be purposeful

But that omission can also be entirely inadvertent. Even if we’re not actively trying to avoid disagreement, our Facebook friends tend to share our views and interests

An ‘echo chamber’ is a social structure from which other relevant voices have been actively discredited. Where an epistemic bubble merely omits contrary views, an echo chamber brings its members to actively distrust outsiders.

an echo chamber is something like a cult. A cult isolates its members by actively alienating them from any outside sources. Those outside are actively labelled as malignant and untrustworthy.

In epistemic bubbles, other voices are not heard; in echo chambers, other voices are actively undermined.

The way to break an echo chamber is not to wave “the facts” in the faces of its members. It is to attack the echo chamber at its root and repair that broken trust.

Looking to others for corroboration is a basic method for checking whether one has reasoned well or badly

They have been in the limelight lately, most famously in Eli Pariser’s The Filter Bubble (2011) and Cass Sunstein’s #Republic: Divided Democracy in the Age of Social Media (2017).

The general gist: we get much of our news from Facebook feeds and similar sorts of social media. Our Facebook feed consists mostly of our friends and colleagues, the majority of whom share our own political and cultural views

various algorithms behind the scenes, such as those inside Google search, invisibly personalise our searches, making it more likely that we’ll see only what we want to see. These processes all impose filters on information.

Such filters aren’t necessarily bad. The world is overstuffed with information, and one can’t sort through it all by oneself: filters need to be outsourced.

That’s why we all depend on extended social networks to deliver us knowledge

any such informational network needs the right sort of broadness and variety to work

Each individual person in my network might be superbly reliable about her particular informational patch but, as an aggregate structure, my network lacks what Sanford Goldberg in his book Relying on Others (2010) calls ‘coverage-reliability’. It doesn’t deliver to me a sufficiently broad and representative coverage of all the relevant information.

Epistemic bubbles also threaten us with a second danger: excessive self-confidence.

An ‘epistemic bubble’ is an informational network from which relevant voices have been excluded by omission

Suppose that I believe that the Paleo diet is the greatest diet of all time. I assemble a Facebook group called ‘Great Health Facts!’ and fill it only with people who already believe that Paleo is the best diet. The fact that everybody in that group agrees with me about Paleo shouldn’t increase my confidence level one bit. They’re not mere copies – they actually might have reached their conclusions independently – but their agreement can be entirely explained by my method of selection.

Luckily, though, epistemic bubbles are easily shattered. We can pop an epistemic bubble simply by exposing its members to the information and arguments that they’ve missed.

echo chambers are a far more pernicious and robust phenomenon.

amieson and Cappella’s book is the first empirical study into how echo chambers function

echo chambers work by systematically alienating their members from all outside epistemic sources.

Their research centres on Rush Limbaugh, a wildly successful conservative firebrand in the United States, along with Fox News and related media

His constant attacks on the ‘mainstream media’ are attempts to discredit all other sources of knowledge. He systematically undermines the integrity of anybody who expresses any kind of contrary view.

outsiders are not simply mistaken – they are malicious, manipulative and actively working to destroy Limbaugh and his followers. The resulting worldview is one of deeply opposed force, an all-or-nothing war between good and evil

The result is a rather striking parallel to the techniques of emotional isolation typically practised in cult indoctrination

cult indoctrination involves new cult members being brought to distrust all non-cult members. This provides a social buffer against any attempts to extract the indoctrinated person from the cult.

The echo chamber doesn’t need any bad connectivity to function. Limbaugh’s followers have full access to outside sources of information

As Elijah Millgram argues in The Great Endarkenment (2015), modern knowledge depends on trusting long chains of experts. And no single person is in the position to check up on the reliability of every member of that chain

Their worldview can survive exposure to those outside voices because their belief system has prepared them for such intellectual onslaught.

exposure to contrary views could actually reinforce their views. Limbaugh might offer his followers a conspiracy theory: anybody who criticises him is doing it at the behest of a secret cabal of evil elites, which has already seized control of the mainstream media.

Perversely, exposure to outsiders with contrary views can thus increase echo-chamber members’ confidence in their insider sources, and hence their attachment to their worldview.

‘evidential pre-emption’. What’s happening is a kind of intellectual judo, in which the power and enthusiasm of contrary voices are turned against those contrary voices through a carefully rigged internal structure of belief.

One might be tempted to think that the solution is just more intellectual autonomy. Echo chambers arise because we trust others too much, so the solution is to start thinking for ourselves.

that kind of radical intellectual autonomy is a pipe dream. If the philosophical study of knowledge has taught us anything in the past half-century, it is that we are irredeemably dependent on each other in almost every domain of knowledge

Limbaugh’s followers regularly read – but do not accept – mainstream and liberal news sources. They are isolated, not by selective exposure, but by changes in who they accept as authorities, experts and trusted sources.

we depend on a vastly complicated social structure of trust. We must trust each other, but, as the philosopher Annette Baier says, that trust makes us vulnerable. Echo chambers operate as a kind of social parasite on that vulnerability, taking advantage of our epistemic condition and social dependency.

I am quite confident that there are plenty of echo chambers on the political Left. More importantly, nothing about echo chambers restricts them to the arena of politics

The world of anti-vaccination is clearly an echo chamber, and it is one that crosses political lines. I’ve also encountered echo chambers on topics as broad as diet (Paleo!), exercise technique (CrossFit!), breastfeeding, some academic intellectual traditions, and many, many more

Here’s a basic check: does a community’s belief system actively undermine the trustworthiness of any outsiders who don’t subscribe to its central dogmas? Then it’s probably an echo chamber.

much of the recent analysis has lumped epistemic bubbles together with echo chambers into a single, unified phenomenon. But it is absolutely crucial to distinguish between the two.

Epistemic bubbles are rather ramshackle; they go up easily, and they collapse easily

Echo chambers are far more pernicious and far more robust. They can start to seem almost like living things. Their belief systems provide structural integrity, resilience and active responses to outside attacks

the two phenomena can also exist independently. And of the events we’re most worried about, it’s the echo-chamber effects that are really causing most of the trouble.

new data does, in fact, seem to show that people on Facebook actually do see posts from the other side, or that people often visit websites with opposite political affiliation.

their basis for evaluation – their background beliefs about whom to trust – are radically different. They are not irrational, but systematically misinformed about where to place their trust.

Many people have claimed that we have entered an era of ‘post-truth’.

Not only do some political figures seem to speak with a blatant disregard for the facts, but their supporters seem utterly unswayed by evidence. It seems, to some, that truth no longer matters.

This is an explanation in terms of total irrationality. To accept it, you must believe that a great number of people have lost all interest in evidence or investigation, and have fallen away from the ways of reason.

echo chambers offers a less damning and far more modest explanation. The apparent ‘post-truth’ attitude can be explained as the result of the manipulations of trust wrought by echo chambers.

We don’t have to attribute a complete disinterest in facts, evidence or reason to explain the post-truth attitude. We simply have to attribute to certain communities a vastly divergent set of trusted authorities.

An echo chamber doesn’t destroy their members’ interest in the truth; it merely manipulates whom they trust and changes whom they accept as trustworthy sources and institutions.

in many ways, echo-chamber members are following reasonable and rational procedures of enquiry. They’re engaging in critical reasoning. They’re questioning, they’re evaluating sources for themselves, they’re assessing different pathways to information. They are critically examining those who claim expertise and trustworthiness, using what they already know about the world

none of this weighs against the existence of echo chambers. We should not dismiss the threat of echo chambers based only on evidence about connectivity and exposure.

Notice how different what’s going on here is from, say, Orwellian doublespeak, a deliberately ambiguous, euphemism-filled language designed to hide the intent of the speaker.

echo chambers don’t trade in vague, ambiguous pseudo-speech. We should expect that echo chambers would deliver crisp, clear, unambiguous claims about who is trustworthy and who is not

clearly articulated conspiracy theories, and crisply worded accusations of an outside world rife with untrustworthiness and corruption.

Once an echo chamber starts to grip a person, its mechanisms will reinforce themselves.

In an epistemically healthy life, the variety of our informational sources will put an upper limit to how much we’re willing to trust any single person. Everybody’s fallible; a healthy informational network tends to discover people’s mistakes and point them out. This puts an upper ceiling on how much you can trust even your most beloved leader

nside an echo chamber, that upper ceiling disappears.

Being caught in an echo chamber is not always the result of laziness or bad faith. Imagine, for instance, that somebody has been raised and educated entirely inside an echo chamber

when the child finally comes into contact with the larger world – say, as a teenager – the echo chamber’s worldview is firmly in place. That teenager will distrust all sources outside her echo chamber, and she will have gotten there by following normal procedures for trust and learning.

It certainly seems like our teenager is behaving reasonably. She could be going about her intellectual life in perfectly good faith. She might be intellectually voracious, seeking out new sources, investigating them, and evaluating them using what she already knows.

The worry is that she’s intellectually trapped. Her earnest attempts at intellectual investigation are led astray by her upbringing and the social structure in which she is embedded.

Echo chambers might function like addiction, under certain accounts. It might be irrational to become addicted, but all it takes is a momentary lapse – once you’re addicted, your internal landscape is sufficiently rearranged such that it’s rational to continue with your addiction

Similarly, all it takes to enter an echo chamber is a momentary lapse of intellectual vigilance. Once you’re in, the echo chamber’s belief systems function as a trap, making future acts of intellectual vigilance only reinforce the echo chamber’s worldview.

There is at least one possible escape route, however. Notice that the logic of the echo chamber depends on the order in which we encounter the evidence. An echo chamber can bring our teenager to discredit outside beliefs precisely because she encountered the echo chamber’s claims first. Imagine a counterpart to our teenager who was raised outside of the echo chamber and exposed to a wide range of beliefs. Our free-range counterpart would, when she encounters that same echo chamber, likely see its many flaws

Those caught in an echo chamber are giving far too much weight to the evidence they encounter first, just because it’s first. Rationally, they should reconsider their beliefs without that arbitrary preference. But how does one enforce such informational a-historicity?

The escape route is a modified version of René Descartes’s infamous method.

Meditations on First Philosophy (1641). He had come to realise that many of the beliefs he had acquired in his early life were false. But early beliefs lead to all sorts of other beliefs, and any early falsehoods he’d accepted had surely infected the rest of his belief system.

The only solution, thought Descartes, was to throw all his beliefs away and start over again from scratch.

He could start over, trusting nothing and no one except those things that he could be entirely certain of, and stamping out those sneaky falsehoods once and for all. Let’s call this the Cartesian epistemic reboot.

Notice how close Descartes’s problem is to our hapless teenager’s, and how useful the solution might be. Our teenager, like Descartes, has problematic beliefs acquired in early childhood. These beliefs have infected outwards, infesting that teenager’s whole belief system. Our teenager, too, needs to throw everything away, and start over again.

Let’s call the modernised version of Descartes’s methodology the social-epistemic reboot.

when she starts from scratch, we won’t demand that she trust only what she’s absolutely certain of, nor will we demand that she go it alone

For the social reboot, she can proceed, after throwing everything away, in an utterly mundane way – trusting her senses, trusting others. But she must begin afresh socially – she must reconsider all possible sources of information with a presumptively equanimous eye. She must take the posture of a cognitive newborn, open and equally trusting to all outside sources

we’re not asking people to change their basic methods for learning about the world. They are permitted to trust, and trust freely. But after the social reboot, that trust will not be narrowly confined and deeply conditioned by the particular people they happened to be raised by.

Such a profound deep-cleanse of one’s whole belief system seems to be what’s actually required to escape. Look at the many stories of people leaving cults and echo chambers

Take, for example, the story of Derek Black in Florida – raised by a neo-Nazi father, and groomed from childhood to be a neo-Nazi leader. Black left the movement by, basically, performing a social reboot. He completely abandoned everything he’d believed in, and spent years building a new belief system from scratch. He immersed himself broadly and open-mindedly in everything he’d missed – pop culture, Arabic literature, the mainstream media, rap – all with an overall attitude of generosity and trust.

It was the project of years and a major act of self-reconstruction, but those extraordinary lengths might just be what’s actually required to undo the effects of an echo-chambered upbringing.

we need to attack the root, the systems of discredit themselves, and restore trust in some outside voices.

Stories of actual escapes from echo chambers often turn on particular encounters – moments when the echo-chambered individual starts to trust somebody on the outside.

Black’s is case in point. By high school, he was already something of a star on neo-Nazi media, with his own radio talk-show. He went on to college, openly neo-Nazi, and was shunned by almost every other student in his community college. But then Matthew Stevenson, a Jewish fellow undergraduate, started inviting Black to Stevenson’s Shabbat dinners. In Black’s telling, Stevenson was unfailingly kind, open and generous, and slowly earned Black’s trust. This was the seed, says Black, that led to a massive intellectual upheaval – a slow-dawning realisation of the depths to which he had been misled

Similarly, accounts of people leaving echo-chambered homophobia rarely involve them encountering some institutionally reported fact. Rather, they tend to revolve around personal encounters – a child, a family member, a close friend coming out.

hese encounters matter because a personal connection comes with a substantial store of trust.

We don’t simply trust people as educated experts in a field – we rely on their goodwill. And this is why trust, rather than mere reliability, is the key concept

goodwill is a general feature of a person’s character. If I demonstrate goodwill in action, then you have some reason to think that I also have goodwill in matters of thought and knowledge.

f one can demonstrate goodwill to an echo-chambered member – as Stevenson did with Black – then perhaps one can start to pierce that echo chamber.

the path I’m describing is a winding, narrow and fragile one. There is no guarantee that such trust can be established, and no clear path to its being established systematically.

what we’ve found here isn’t an escape route at all. It depends on the intervention of another. This path is not even one an echo-chamber member can trigger on her own; it is only a whisper-thin hope for rescue from the outside.

adolescents aren't reckless because they underestimate risks, but because they overestimate rewards—or, rather, find rewards more rewarding than adults do. The reward centers of the adolescent brain are much more active than those of either children or adults.

What teenagers want most of all are social rewards, especially the respect of their peers

Becoming an adult means leaving the world of your parents and starting to make your way toward the future that you will share with your peers. Puberty not only turns on the motivational and emotional system with new force, it also turns it away from the family and toward the world of equals.

The second crucial system in our brains has to do with control; it channels and harnesses all that seething energy. In particular, the prefrontal cortex reaches out to guide other parts of the brain, including the parts that govern motivation and emotion. This is the system that inhibits impulses and guides decision-making, that encourages long-term planning and delays gratification.

Today's adolescents develop an accelerator a long time before they can steer and brake.

Expertise comes with experience.

In gatherer-hunter and farming societies, childhood education involves formal and informal apprenticeship. Children have lots of chances to practice the skills that they need to accomplish their goals as adults, and so to become expert planners and actors.

In the past, to become a good gatherer or hunter, cook or caregiver, you would actually practice gathering, hunting, cooking and taking care of children all through middle childhood and early adolescence—tuning up just the prefrontal wiring you'd need as an adult. But you'd do all that under expert adult supervision and in the protected world of childhood

In contemporary life, the relationship between these two systems has changed dramatically. Puberty arrives earlier, and the motivational system kicks in earlier too. At the same time, contemporary children have very little experience with the kinds of tasks that they'll have to perform as grown-ups.

The experience of trying to achieve a real goal in real time in the real world is increasingly delayed, and the growth of the control system depends on just those experiences.

This control system depends much more on learning. It becomes increasingly effective throughout childhood and continues to develop during adolescence and adulthood, as we gain more experience.

An ever longer protected period of immaturity and dependence—a childhood that extends through college—means that young humans can learn more than ever before. There is strong evidence that IQ has increased dramatically as more children spend more time in school

children know more about more different subjects than they ever did in the days of apprenticeships.

Wide-ranging, flexible and broad learning, the kind we encourage in high-school and college, may actually be in tension with the ability to develop finely-honed, controlled, focused expertise in a particular skill, the kind of learning that once routinely took place in human societies.

this new explanation based on developmental timing elegantly accounts for the paradoxes of our particular crop of adolescents.

First, experience shapes the brain.

the brain is so powerful precisely because it is so sensitive to experience. It's as true to say that our experience of controlling our impulses make the prefrontal cortex develop as it is to say that prefrontal development makes us better at controlling our impulses

Second, development plays a crucial role in explaining human nature

there is more and more evidence that genes are just the first step in complex developmental sequences, cascades of interactions between organism and environment, and that those developmental processes shape the adult brain. Even small changes in developmental timing can lead to big changes in who we become.

Brain research is often taken to mean that adolescents are really just defective adults—grown-ups with a missing part.

But the new view of the adolescent brain isn't that the prefrontal lobes just fail to show up; it's that they aren't properly instructed and exercised

Instead of simply giving adolescents more and more school experiences—those extra hours of after-school classes and homework—we could try to arrange more opportunities for apprenticeship

Summer enrichment activities like camp and travel, now so common for children whose parents have means, might be usefully alternated with summer jobs, with real responsibilities.

an eyewitness had drawn widespread attention and touched off protests by Black community members, who called for the officer to be fired.

The protests were set against the backdrop of the trial of Derek Chauvin, one of four former Minneapolis police officers who have been charged in the killing of George Floyd last May.

“De-escalating is paramount in the work that our officers do,”

daria Arradondo, the city’s police chief, said during a news

a Arradondo, the city’s police chief, said during a new

“violent felony carjacking”

Minneapolis police officers had been helping their suburban counterparts, who had stopped a suspect in the carjacking, when a group of residents approached and protested that the officers had the wrong person in custody, the eyewitness video showed

The events were recorded on video by an eyewitness and came as residents had been protesting another teenager’s arrest in connection with what police said was a “violent felony carjacking.”

Black teenager at the scene during a skirmish, the video showed. The person who recorded the video had been walking away from scene when the exchange happened, so it was not immediately clear what had led the officer to throw the punch.

he didn’t know whether the young man had played a role in the carjacking.

The police did not provide further details about whether the teenager had been charged or the nature of his injuries.

Civil rights groups criticized the use of force by the officer.

“The M.P.D. is out of control,”

“They don’t care if they are being filmed or if their body cameras are on. They know they can act with impunity.”

nneapolis said that he could not comment on the specifics of the case without potentially compromising the internal affairs investigation.

neapolis said that he could not comment on the specifics of the

that he could not comment on the specifics of the case without potentially compromising the internal a

Pregnancy, she explained, may help a woman’s brain specialize in “a mother’s ability to recognize the needs of her infant, to recognize social threats or to promote mother-infant bonding.”

Researchers wanted to see if the women’s brain changes affected anything related to mothering. They found that relevant brain regions in mothers showed more activity when women looked at photos of their own babies than with photos of other children.

During another period of roiling hormonal change — adolescence — gray matter decreases in several brain regions that are believed to provide fine-tuning for the social, emotional and cognitive territory of being a teenager.

evidence against the common myth of ‘mommy brain.’

The problem with the conservative story is that it doesn’t map particularly well onto contemporary mores and life patterns. A successful chastity-centric culture seems to depend on a level of social cohesion, religious intensity and shared values that exists only in small pockets of the country. Mormon Utah, for instance, largely lives up to the conservative ideal, with some of America’s lowest rates of teenage pregnancies, out-of-wedlock births and abortions. But many other socially conservative regions (particularly in the South) feature higher rates of unwed and teenage parenthood than in the country as a whole.

The conservative narrative, by contrast, argues that it’s more important to promote chastity, monogamy and fidelity than to worry about whether there’s a prophylactic in every bedroom drawer or bathroom cabinet. To the extent that contraceptive use has a significant role in the conservative vision (and obviously there’s some Catholic-Protestant disagreement), it’s in the context of already stable, already committed relationships. Monogamy, not chemicals or latex, is the main line of defense against unwanted pregnancies.

The liberal vision tends to emphasize access to contraception as the surest path to stable families, wanted children and low abortion rates. The more direct control that women have over when and whether sex makes babies, liberals argue, the less likely they’ll be to get pregnant at the wrong time and with the wrong partner — and the less likely they’ll be to even consider having an abortion

if liberal social policies really led inexorably to fewer unplanned pregnancies and thus fewer abortions, you would expect “blue” regions of the country to have lower teen pregnancy rates and fewer abortions per capita than demographically similar “red” regions. But that isn’t what the data show. Instead, abortion rates are frequently higher in more liberal states, where access is often largely unrestricted, than in more conservative states, which are more likely to have parental consent laws, waiting periods, and so on.

liberal states don’t necessarily do better than conservative ones at preventing teenagers from getting pregnant in the first place. Instead, the lower teenage birth rates in many blue states are mostly just a consequence of (again) their higher abortion rates.

These are realities liberals should keep in mind when tempted to rail against conservatives for rejecting the intuitive-seeming promise of “more condoms, fewer abortions.” What’s intuitive isn’t always true, and if social conservatives haven’t figured out how to make all good things go together in post-sexual-revolution America, neither have social liberals.

Having to take a test in swimwear seems not to distract most young men, but it does distract many young women, almost certainly due to the absurd beauty standards to which they are disproportionately subjected. In the words of the researchers, the swimsuit study effectively demonstrated “the psychological costs of raising girls in a culture that persistently objectifies the female body.”

Now, swimsuit season, especially for adolescent girls, no longer ends with summer because girls are using social media to share carefully crafted bikini shots all the time.

these are images with which girls become especially engaged. According to Dr. Walsh, “Girls are not comparing themselves to media ideals as much as one would expect, but they are making micro-comparisons to their peers. It’s not me versus Gisele Bündchen in a bikini, it’s me versus my good friend Amy in our bikinis.”

A new review of studies looking at the psychological effects of social media found that young people who spend a lot of time appraising their friends’ online photos ultimately feel worse about their own bodies.

Online imagery allows adolescents to observe one another in detail and gives unprecedented power to the age-old teenage preoccupation with appearance. We want to help our teenagers minimize the harm that can come from social media use, but the deluge of digital activity can make it hard to know where to start.

“One of the things you want to do as a parent traveling is, look for places where you can interact a little more with objects and push the buttons,” Dr. Klass said.

“You can bring a bunch of 7-year-olds into a room, and some will be drawn to sports equipment, some drawn to animals. They have really distinct interests you’ll want to play to,”

“They haven’t yet decided that anything you’re interested in may not be the coolest thing. And they probably still want to know what you are excited about,”

As for teenagers, they may want to lead the way, and they may show you things about the world you never knew.”

in 1900 in America, if you asked a child, what do dogs and rabbits have in common, they would say, “Well, you use dogs to hunt rabbits.” This is not the answer that the IQ tests want. They want you to classify. Today, a child would be likely to say, “They are both animals.” They picked up the habit of classification and use the vocabulary of science.

In 1910, schools were focused on kids memorizing things about the real world. Today, they are entirely about relationships.

One of the fundamental things is the switch from “utilitarian spectacles” to “scientific spectacles.” The fact that we wear scientific spectacles doesn’t mean that we actually know a lot about science.

Formal schooling is terribly important; it helps you think in the way that IQ testers like.

we have learned to use logic to attack the hypothetical. We have an ability to deal with a much wider range of problems than our ancestors would.

In 1950, teenagers could not only understand their parents, but they could also mimic their speech. Today, teenagers can still understand their parents. Their passive vocabularies are good enough. But when it comes to the words they actively use, they are much less capable of adult speak.

The brighter you are, the quicker after the age of 65 you have a downward curve for your analytic abilities

Retire from your job, but read great literature. Read about the history of science. Try and keep up your problem solving skills

One of the most interesting predictions is what will happen to the developing world. If they industrialize, in theory, they should have the explosive IQ gains in the coming century that we had in the last century.

the number of advanced-placement classes that local students feel compelled to take and the number of hospitalizations for depression rise in tandem.

They reflect a status consciousness that bedevils Americans at all income levels, and they underscore an economic trepidation that is sadly widespread and is seemingly intensified by the gaping divide between the haves and have-nots.

According to a 2013 survey by the C.D.C., 17 percent of American high school students had considered suicide in the previous year. Eight percent said they’d attempted it.

“There’s something about childhood itself in Palo Alto and in communities like Palo Alto that undermines the mental health and wellness of our children,

It reflects on the shortfalls of some modern parenting, which, in her view, can be not only overprotective but overbearing, micromanaging the lives of children, pointing them toward specific mile markers of achievement and denying them any time to flail or room to fail. They wind up simultaneously frazzled and fragile

“The suicides are tragic, but they are at the pointy head of the pyramid, the tippy top,” she said. “Beneath them is a larger number of kids who are really struggling and beneath them is an even larger number of kids who feel an amount of stress and pressure that they shouldn’t be made to and that’s untenable.”

while many Palo Alto parents are “wealthy and secure beyond imagining,” they’re consumed by fear of losing that perch or failing to bequeath it to their kids. “Maintaining and advancing insidiously high educational standards in our children is a way to soothe this anxiety,” he said

He recommended lightening children’s schedules, limiting the number of times that they take the SAT, lessening the message that it’s Stanford or bust.

“I will never be neutral on this issue,” he wrote. “The ‘Koala Dad’ is the far better parent than the ‘Tiger Mom.’ ”

“Want the best for your child, not for your child to be the best.”

But although it is always tempting to use hard science to explain otherwise perplexing behaviour, neuroimaging research is still in its infancy

There is much about the brain that no one understands yet, and there is rarely a clear relationship between a particular brain region and a discrete function, so any links between brain structure and behaviour remain speculative. Indeed, while researchers often take care to show that the relationship between how a brain looks and how someone behaves is correlative, often this link is misinterpreted as a sign of causation

Scientists also point out that brain science cannot be understood in a vacuum. All behaviour is a function of many influences, including parenting, socioeconomic status, nutrition, culture and so on

Revisiting your youth culture when your own youth has mostly fled is an exercise in estrangement and mild humiliation, like running into your therapist at Victoria’s Secret.

“We didn’t know what it was going to be,” the journalist and activist Kevin Powell, one of the original roommates, says in the first episode of “Homecoming.” “We were just ourselves.”

by agreeing to the constant presence of producers and cameras, were the harbingers of today’s culture, in which self-image is shaped in the expectation of a lens and personhood collates with brand identity.

Moon Frye seems to have known every other child star in Los Angeles and its outlying counties: Sara Gilbert, Emmanuel Lewis, Brian Austin Green, Mark-Paul Gosselaar, Joey Lawrence, Jenny Lewis (hilarious) and at least a dozen more.

These were children valued less for who they were and more for the fandom and ads they could generate, the tickets they could sell

Today, that’s everyone with an Instagram account, potentially.

“Kid 90” also reminds us that until pretty recently, the dumb things teenagers wore and the dumber things they did and said didn’t have an afterlife, because there were few ways to record them and even fewer ways to disseminate those recordings.

I was, unconvincingly, so many people as a teenager — a rebel, a sophisticate, a drama nerd, a go-getter, a witch.

The comedy of adolescence is that it’s practice for adulthood. The tragedy is that adolescents practice on one another

I’m unutterably grateful that my own mortifications — lines like, “I’m not a feminist, I’m really more like a humanist,”

Moon Frye seems to have also struggled with her image and with how the industry treated her when her body began to diverge from Punky’s

In an agonizing section of the documentary, she talks about going through puberty, developing breasts and being seen, at 13 and 14 years old, only for bimbo-esque roles.

Peers called her Punky Boobster.

“It’s hard when you’ve got boobs and you can’t work in this business,”

What if the business is the problem and not children’s bodies?

She wanted serious roles, so at 15, she had breast reduction surgery.

A crucial aspect of adolescence is performance

I could try on a persona for size and then return it, tags on

There was no social media then and no one wanted me on any reality series, so I never had to curate a self before I had one.

What would I have done for likes? What would that have made me?

Like Moon Frye and a lot of girls with big feelings and poetic inclinations, I kept diaries as a teenager. I’ve never gone back and read them. Why? I’m afraid that I might be embarrassed by my younger self or that she might be embarrassed by boring, wine-mom me

But I hope we’d get along. And then we could take a kiss-face selfie together, filter it, Facetune it, post it with some cute caption and watch the little hearts roll in.

Learning how to make friends is a major part of growing up, and friendship requires a certain amount of risk-taking. This is true for making a new friend, but it’s also true for maintaining friendships. When there are problems that need to be faced—big ones or small ones—it takes courage to be honest about your feelings and then hear what the other person has to say

But when friendship is conducted online and through texts, kids are doing this in a context stripped of many of the most personal—and sometimes intimidating—aspects of communication

A survey conducted by the Royal Society for Public Health asked 14-24 year olds in the UK how social media platforms impacted their health and wellbeing. The survey results found that Snapchat, Facebook, Twitter and Instagram all led to increased feelings of depression, anxiety, poor body image and loneliness.

“Girls are socialized more to compare themselves to other people, girls in particular, to develop their identities, so it makes them more vulnerable to the downside of all this.” She warns that a lack of solid self-esteem is often to blame. “We forget that relational aggression comes from insecurity and feeling awful about yourself, and wanting to put other people down so you feel better.”

. Teenage girls sort through hundreds of photos, agonizing over which ones to post online. Boys compete for attention by trying to out-gross one other, pushing the envelope as much as they can in the already disinhibited atmosphere online.

Another big change that has come with new technology and especially smart phones is that we are never really alone. Kids update their status, share what they’re watching, listening to, and reading, and have apps that let their friends know their specific location on a map at all times.

Offline, the gold standard advice for helping kids build healthy self-esteem is to get them involved in something that they’re interested in