Is war inevitable, given the human condition? What causes human agression? For Plato's Socrates it comes from innate tendencies nurtured in the wrong way. And that's where war comes from. Angie Hobbs gives a fascinating introduction to this aspect of Plato's Republic in this episode of Philosophy Bites.
Other Audio Resources
Listen to Angie Hobbs on Plato on Erotic Love (an earlier episode of Philosophy Bites)
Listen to Angie Hobbs discussing Socrates on In Our Time