Вопрос о войнах на раннем развитии человечества представляется спорным. См.: Bowles, Samuel. 2009. “Did warfare among ancestral hunter-gatherers affect the evolution of human social behaviors?” Science 324:1293–98; Fry, Douglas P., and Patrik Soderberg. 2013. “Lethal aggression in mobile forager bands and implications for the origins of war.” Science 341:270–73.