旧石器时代中期
Evidence from archeology and comparative ethnography indicates that Middle Paleolithic people lived in small, egalitarian band societies similar to those of Upper Paleolithic societies and some modern hunter-gatherers such as the ǃKung and Mbuti peoples. Both Neanderthal and modern human societies took care of the elderly members of their societies during the Middle Paleolithic. Christopher Boehm (1999) has hypothesized that egalitarianism may have arisen in Middle Paleolithic societies because of a need to distribute resources such as food and meat equally to avoid famine and ensure a stable food supply.