Intertribal aggression, escalating in some cultures to limited warfare, is common enough to be regarded as a general characteristic of hunter-gathere… - Edward O. Wilson

If we choose the path of destruction, the planet will continue to descend irreversibly into the Anthropocene Epoch, the biologically final age in which the planet exists almost exclusively by, for, and of ourselves.

Early human beings... filled a special ecological niche: they were carnivorous primates of the African plains. ...When agriculture permitted the increase of population density, game was no longer abundant... carnivorism remained a basic dietary impulse, with cultural aftereffects that varied according to the special conditions of the environment in which the society evolved.

We seem to be able to be fully comfortable only when the remainder of humanity can be labeled as members versus nonmembers.