Anyone read Goliath's Curse? The author (Kemp) is extremely opposed to the more Pinker-ish idea that humans in their natural consition led lives that were nasty, short, and brutal; dismissing this sort of thing as overblown.

Kemp had the very anarchist friendly theory that it's states (Goliaths) and / or the conditions that lead to them that lead to violence.

His evidence is most convincing when it's looking at the paleolithic, as h sapiens made its way out of Africa ... but maybe this is not a natural state as they had not yet reached any population limits so migration was always an alternative to conflict?