" The decisive battle between early culture and human nature must have been waged on the field of primate sexuality…. Among subhuman primates sex had organized society; the customs of hunters and gatherers testify eloquently that now society was to organize sex…. In selective adaptation to the perils of the Stone Age, human society overcame or subordinated such primate propensities as selfishness, indiscriminate sexuality, dominance and brute competition. It substituted kinship and co-operation for conflict, placed solidarity over sex, morality over might. In its earliest days it accomplished the greatest reform in history, the overthrow of human primate nature, and thereby secured the evolutionary future of the species." — Sahlins, M. D. 1960 The origin of society. Scientific American 203(3): 76–87. http://radicalanthropologygroup.org/sites/default/files/pdf/class_text_036.pdf v>