Jonathan Haidt is a man with a mission ... to alert us to the harms that social media and modern parenting are doing to our children. His latest book, The Anxious Generation: How the Great Rewiring of Childhood Is Causing an Epidemic of Mental Illness ... writes of a "tidal wave" of increases in mental illness and distress beginning around 2012. Young adolescent girls are hit hardest, but boys are in pain, too. He sees two factors that have caused this. The first is the decline of play-based childhood caused by overanxious parenting, which allows children fewer opportunities for unsupervised play and restricts their movement. The second factor is the ubiquity of smartphones and the social media apps that thrive upon them. The result is the "great rewiring of childhood" of his book's subtitle and an epidemic of mental illness and distress. You don't have to be a statistician to know that ... Instagram is toxic for some " perhaps many " teenage girls. Ever since Frances Haugen's revelations, we have known that Facebook itself knew that 13% of British teenage girls said that their suicidal thoughts became more frequent after starting on Instagram. And the company's own researchers found that 32% of teen girls said that when they felt bad about their bodies, Instagram made them feel worse. These findings might not meet the exacting standards of the best scientific research, but they tell you what you need to know.