. - [margaret] social psychologist, bestselling author, and nyu professor jonathan haidt is out with a new book, "the anxious generation," that sets out to explain why. haidt posits that the rise of the smartphone and social media, alongside shifting norms for parenting, have led to a dangerous rewiring of young people's brains. - this is about the worst thing you can imagine to give kids at the beginning of puberty, - [margaret] but given the ubiquity of smartphones, is there a way out? - everyone sees there's a problem. i just have to give them hope that, if we act together at the same time, we can actually change things. - [margaret] what does bestselling author and professor jonathan haidt say now? - [narrator] "firing line with margaret hoover" is made possible in part by robert granieri, vanessa and henry cornell, the fairweather foundation, peter and mary kalikow, and by the following. corporate funding is provided by stephens inc. - jonathan haidt, welcome to "firing line." - margaret, what a pleasure. - we've known each other for several years, and i have followed your work