Professor Jonathan Haidt is a social psychologist and author. He is a Professor of Ethical Leadership at the New York University Stern School of Business. He authored The Happiness Hypothesis, The Righteous Mind and The Coddling of the American Mind. 00:00 - 5:05 Jonathan explains the latest findings on mental health and digital social media 05:06 - 6:40 The Phone-Based Childhood 6:41 - 9:45 Social Networking vs Performative Platforms 9:46 - 13:12 "But if I don't use social media, I will be cut off from my friends" 13:13 - 16:13 The greatest public health threat to children.