And What about Peaceful Bonobo?

Came across another article (Nicholas Wade, The New York Times) on that 10-year study of warring chimpanzees.

Wade also references our other cousin, the peaceful bonobo.

Warfare among human groups that still live by hunting and gathering resembles chimp warfare in several ways. Foragers emphasize raids and ambushes in which few people are killed, yet casualties can mount up with incessant skirmishes. Dr. Wrangham argues that chimps and humans have both inherited a propensity for aggressive territoriality from a chimplike ancestor. Others argue the chimps’ peaceful cousin, the bonobo, is just as plausible a model for the joint ancestor."

"Dr. Mitani [co-author of the new study on warring chimps] , however, is reluctant to infer any genetic link between human and chimp warfare, despite the similarity of purpose, cost and tactics. “It’s just not at all clear to me that these lethal raids are similar sorts of phenomena,” he said. More interesting than warfare, in his view, is the cooperative behavior that makes war possible."