Sorry for the hijack: I read a book probably 10 or more years ago called "Peacemaking Amoung Primates". It was VERY thought provoking. Anyway, it covered the Bonobo social structure. I especially liked the end where they compared human peacemaking with primate peacemaking... especially the bit with Kruschev's pounding his shoe on a desk at the UN. Very, very, very excellent work.