After more than a decade of stability or improvement, the mental health of adolescents plunged in the early 2010s. Rates of depression, anxiety, self-harm, and suicide rose sharply, more than doubling on many measures. Why?

In The Anxious Generation, social psychologist Jonathan Haidt presents more than a dozen mechanisms by which this great rewiring of childhood has interfered with childrens social and neurological development, covering everything from sleep deprivation to attention fragmentation, addiction, loneliness, social contagion, social comparison, and perfectionism. He explains why social media damages girls more than boys and why boys have been withdrawing from the real world into the virtual world, with disastrous consequences for themselves, their families, and their societies.

Most important, Haidt issues a clear call to action. He diagnoses the collective action problems that trap us, and then proposes four simple rules that might set us free. He describes steps that parents, teachers, schools, tech companies, and governments can take to end the epidemic of mental illness and restore a more humane childhood.

The Instant #1 New York Times Bestseller.