No less useless than a peacock's plumage or an elephant seal's beach combat.

I still like to pretend that our social skills allow us to elevate beyond primal instincts.

I don't understand this bio-reductionist attitude.

When was the last time your murdered someone with your bare hands at the supermarket?

It never explains everything, but it provides very important context to help understand what we do. Hopefully even you would agree that we are all influenced to some degree by "bio"; thus, understanding it provides context.