Dunbar, R. (2003). Evolution of the social brain. Science, 302(5648), 1160–1161. Keywords: Animals; Animals, Wild; Cognition; Endorphins/physiology; Evolution; Female; Grooming; Hierarchy, Social; Language; Neocortex/anatomy & histology/physiology; Papio/physiology/psychology; Reproduction; *Social Behavior; Social Dominance; Social Support; Vocalization, Animal Permanent link \| Save citation: RTF