The book currently topping the New York Times nonfiction bestseller list is The Anxious Generation, a jeremiad against social media and its impact on young people. Its thesis is that apps like Facebook, Instagram, and TikTok have unleashed an epidemic of mental illness among children, preteens, and teenagers. Immediate and extreme measures are required to reverse this deadly trend. The author, NYU social psychologist Jonathan Haidt, has been promoting it everywhere. Parents have rallied around his thesis, and Haidt’s claims have thrown gasoline on a smoldering movement to pass new laws to limit social media. But a review in Nature, one of the world’s most prestigious scientific journals, hit a more critical note. “The book’s repeated suggestion that digital technologies are rewiring our children’s brain and causing an epidemic of mental illness,” wrote Candice L. Odgers, a professor of psychological science at UC Irvine, “is not supported by science.”