Ok, so then it comes down to whether or not it is "human nature" to always have a biggest gang (willing to use aggression to feed itself) around. If not we are doomed to "rape" and are only trying to limit the pain of the rape. Historically this seems to be very common.
But not universal, therefore not human nature.
There will always be people willing to use aggression. Rational societies call these people "criminals."
And irrational societies call these people "past, present, and future government".