Guests: An interview with Jonathan Haidt, social psychologist and professor at NYU Stern School of Business and co-author of "The Amazing Generation: Your Guide to Fun and Freedom in a Screen-Filled World." This week's panel discussion includes Stephanie Ruhle, host of MS NOW's "The 11th Hour" and co-host of the YouTube series "It's Happening with Velshi & Ruhle"; and retired Lt. Gen. H.R. McMaster, author, former United States National Security Advisor, and a senior fellow at the Hoover Institution at Stanford University.