Social psychologist Jonathan Haidt joins Harry Litman to discuss his bestselling book "The Anxious Generation" and how the shift to smartphone-based childhood around 2012 triggered a mental health crisis—especially among liberal girls. Haidt explains his moral foundations theory, why Americans can't agree on basic facts anymore, and how social media created a "curse of Babel" that's undermining both democracy and child development. Plus: his four practical norms for rolling back the phone-based childhood and why we may be accidentally training kids for authoritarianism.