Warless Societies and the Origin of War employs a comparative ethnographic analysis of warless and warlike hunting and gathering societies to isolate distinctive features of peaceful preagricultural people and to develop a theoretical model of the origin of war and the early coevolution of war and society. Examining key Upper Paleolithic cave paintings and burials that document lethal violence, Raymond Kelly's illumination of the transition from warlessness to warfare in several specific locales in Europe and the Middle East confounds understandings of the origin of war prevalent...