The question of whether men are predisposed to war runs hot in contemporary scholarship and online discussion. Within this debate, chimpanzee behavior is often cited to explain humans' propensity for violence; the claim is that male chimpanzees kill outsiders because they are evolutionarily inclined, suggesting to some that people are too. The longstanding critique that killing is instead due to human disturbance has been pronounced dead and buried. In Chimpanzees, War, and History, R. Brian Ferguson challenges this consensus. By historically contextualizing every reported chimpanzee...