Early in the psychologist Peter Gray’s new book, “Restoring Childhood: How to Set Kids Free in the Age of Anxiety” he proposes a thought experiment:

Imagine that your spouse or your closest friend had the same power over you that parents typically have over children. Although you’re an adult, this loving person insists that you never leave the house without an accompanying guardian or a G.P.S. tracker. When you return, they demand a full account of what you did. Frequently, they communicate with your boss, who controls you the way a teacher controls children at school. This boss reprimands you for arriving even a minute late, and prohibits you from talking with your co-workers without permission; you must even ask, publicly, to use the bathroom. Everything you do is judged and ranked in comparison to the work of your coworkers. And, when you wrap up at the office, your employer also requires you to do more work at home, and encourages your loving spouse (or friend) to be sure you do that work.

This doesn’t sound like a very nice life, does it? It’s an existence in which you’re micromanaged and surveilled, given almost no freedom or privacy, and put under constant pressure while, at the same time, being seen as incompetent and lazy.

And yet, it’s how many children live in the United States. Now eighty-two, Gray has spent decades studying kids, particularly how they spend their free time. In “Restoring Childhood,” he warns that they now have none, in both senses: they have no time, because they are over-scheduled and over-schooled, and their time isn’t free, because adults are neither willing nor able to leave even older kids unsupervised.

Child-protective services used to intervene mainly in cases of child abuse; over the decades, however, their remit grew to include not just neglect but “supervisory neglect,” a new parental offense that might involve leaving children briefly unattended in benign circumstances. 38% of children will be at the center of a C.P.S. investigation at some point in their lives. If you let your children play at the park by themselves, you could be reported by your neighbors and led away in handcuffs: it’s no wonder that many of today’s parents keep their kids on a short leash. 

The ultimate goal of childhood is to break away from dependence on parents and establish oneself as one’s own person. But adults, increasingly, are building a world in which this is impossible, and the result has been an ongoing decline in the happiness and mental health of young people.

Many intertwined changes have eroded children’s freedom to play and move about independent of adult control.

• In the 1950s television began keeping kids indoors.
• Houses got a lot bigger, and families smaller, so many kids have the option of retreating to their own bedrooms.
• Adults took control of kids’ sports, replacing sandlot games with Little League and other organized, competitive, coach-centered endeavors.
• Housing developments increasingly omitted sidewalks, favoring drivers over walkers.
• The country grew more litigious, making planners wary of playgrounds, which could attract lawsuits when kids got hurt.
• School got more intense. Between 1950 and 2015, the average American school year got five weeks longer. Recess shrunk, and time for lunch contracted from an hour (at many schools) to twenty minutes.

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In 2004, Willoughby Britton, then a doctoral candidate in clinical psychology at the University of Arizona, began recruiting participants for a study that, she felt sure, would show meditation improves sleep.

But when she reviewed the results, she was dismayed to find they were the opposite of what she had predicted. The participants in the meditation group slept more fitfully, with more frequent awakenings, than those who didn’t meditate. They spent more time in “Stage 1,” the lightest sleep phase, from which people are easily roused. Graph after graph after graph, no matter how you looked at it, number of awakenings, number of micro arousals, number of Stage 1 minutes, the amount of meditation that the subjects practiced was directly correlated with worse sleep quality.

Because most kinds of meditation aim to enhance concentration, the practice can act like a stimulant. And just as chemical stimulants such as caffeine and Adderall can interfere with sleep, so, too, can excessive meditation.

What else, she wondered, did meditation teachers know that they weren’t telling people? Gradually, starting with that sleep study, the tiers of thought propping up Britton’s worldview, that Buddhism is a cure-all, and that meditation was always beneficial, and could never cause harm, would collapse.

Over time, she would find that meditation, a multibillion-dollar industry that is promoted as a treatment for anxiety, chronic pain, alcohol abuse, addiction, and many other ailments, can sometimes, for some people, cause severe and lasting side effects: depression, anxiety, even acute psychosis.

Losing the belief system that had been foundational to her life would lead her to produce a trailblazing body of research about the adverse effects of meditation, and then to found a clinical practice geared toward helping the people, a lot of them, as it turns out, who believe that meditation has harmed them.

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Millions of Americans are doing the same thing, swallowing down gallons of “energy” every month. Around 30 percent of the U.S. population consumes at least one energy drink per day. Among the under-35 crowd, it’s 60 percent. The older demographic still prefers coffee, and 66 percent of Americans drink that every day, too.

The deceptive part is that “energy drinks” don’t actually provide “energy,” beyond what you’d normally get by digesting a bunch of liquid sugar. Instead, they block your capacity to feel how tired you are. To severely oversimplify, all that caffeine functions as an antagonist for adenosine, the chemical that builds up in your brain during the day and makes you feel sleepy. The caffeine molecules fit into your adenosine receptors, blocking the “time to sleep” signal your brain would normally be getting. 

Taurine, meanwhile, is an amino acid that has some health benefits for nerve cells, and L-Carnitine promotes burning fat cells, but neither can create “energy” as such. So when you drink a few Monsters or Red Bulls, you’re still getting physically and mentally fatigued; your brain just doesn’t know it yet. It’s as if, instead of using an oven mitt, you just shot your hand full of Novocaine before grabbing a hot pan. 

Forbes reports that we’re currently in a new energy drink boom, with a global market for the neon-colored liquids estimated at $85.25 billion in 2025 projected to reach $158.53 billion by 2033. The Red Bull company alone is valued at $20-25 billion.

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What happened to Yoga?

Fitness trends come and go. But the workouts people choose also reflect the contemporary understanding of what it means to be well. For years, that meant yoga and its promise of stress reduction and mindfulness. In today’s world of fitness-maxxing and social-media-driven obsession over image, though, the cultural ideal seems to have shifted from inner peace to outward perfection.

Simply exercising and eating well is no longer enough;“biohacking” has become hot. Some of today’s wellness devotees wear continuous glucose monitors to clock blood-sugar spikes in real time as well as $400 titanium rings to track heart-rate variability and REM sleep. The goal: 24/7 self-improvement.

Although people surely sign up for yoga to better themselves, the practice typically encourages them to do so slowly, with humility. Yoga tends to be about letting go of ego and striving, and about surrender, principles that don’t quite fit into a culture obsessed with optimization.