THE INSTANT #1 NEW YORK TIMES BESTSELLER • A must-read for all parents: the generation-defining investigation into the collapse of youth mental health in the era of smartphones, social media, and big tech—and a plan for a healthier, freer childhood. “Erudite, engaging, combative, crusading.” —New York Times Book Review (Editors’ Choice) “Words that chill the parental heart… thanks to Mr. Haidt, we can glimpse the true horror of what happened not only in the U.S. but also elsewhere in the English-speaking world… lucid, memorable… galvanizing.” —Wall Street Journal “[An] important new book... The shift in kids’ energy and attention from the physical world to the virtual one, Haidt shows, has been catastrophic, especially for girls.” —Michelle Goldberg,