Investigative journalist Amanda Ripley wanted to understand the sources of human conflict. So she studied it for more than four years. She detected a strong pattern to the most intractable conflicts, big and small. She found it in divorces, gang violence and political polarization. From the personal to the tribal, we discuss high conflict, and how to pull free of it. Amanda Ripley, Curtis Toler and Jack Beatty join Meghna Chakrabarti.