With the ongoing war in Ukraine and the ever-present likelihood of escalation, John speaks with Prof. Chris Blattman from the University of Chicago to find out why we humans fight? What motivates us to take up arms? Is war so ingrained in human nature? Or is the peaceful resolution to conflict more prevalent than we think? Chris' latest book 'Why We Fight' is a philosophical rumination on this important topic and in this episode, we look at Chris' key findings and see how they apply to the world at large.