We might be stuck with war

War is one of the most persistent aspects of humanity. There's nearly always a war somewhere. War seems to have built us into a species adapted for its perpetuation. It requires flexible thinking, acute visual perception and close family groups to train and continue conducting war.

We need war like colleges need sports teams. It brings people together, it gives us a purpose and we work together toward a common goal. Maybe sports aren't enough to substitute for war.