War: What is it Good for?

War is one of the greatest human evils. It has ruined livelihoods, provoked unspeakable atrocities and left countless millions dead. It has caused economic chaos and widespread deprivation. But, argues bestselling historian Ian Morris, in the very long term, war has in fact been a good thing. In his trademark style, Morris shows that, paradoxically, war is the only human invention that has allowed us to construct peaceful societies.