Why Do Wars Happen?

When war breaks out, we tend to focus on whether the war is justified. Is it right to fight? Under international law, it's not that hard to justify going to war. But if we really want to understand why wars happen, asking only if the war is justified can muddy the water. In this second episode about war, we're focused on understanding how the decision to fight gets made. What leads a leader or society to look at the inevitable devastation that war causes, and say, "We're doing it anyway"? The answer to that question could provide the path to peace. (AP Photo/John Minchillo, FGile)

Guests: Kael Weston, former US State Department diplomat, author of “The Mirror Test: America at War in Iraq and Afghanistan”; Wes Bryant, retired US Air Force Master Sergeant, co-author of “Hunting the Caliphate: America’s War on ISIS and the Dawn of the Strike Cell”; Chris Blattman, professor of global conflict studies, University of Chicago Harris School of Public Policy, author of “Why We Fight: The Roots of War and the Paths to Peace.”