Early populations shifted from quasi-egalitarian hunter-gatherer societies to communities governed by a centralized authority in the middle to late Holocene, but how the transition occurred still puzzles anthropologists. A University of Maine-led group of researchers contend that population size and density served as crucial drivers.  Anthropology professor Paul “Jim” Roscoe led the development of Power read more UMaine researchers explore population size, density in rise of centralized power in antiquity