When suicide bombers blow up crowded marketplaces, or a lone shooter attacks a nightclub, one question we’re always left with is why. What ideology or belief or loyalty would compel someone to do something so horrific? This hour, a look at the underlying psychology of political violence.

The Reformed Radical; The Psychology of Terrorism; What Can Americans Learn from a Norwegian Massacre?; Let's Change the Way We Think About Thinking; The Buddhist Master Who Went On A Four Year Wandering Retreat.