" Mobile bands of hunter-gatherers are relatively egalitarian, and their political sphere is confined to the band’s own territory and to shifting alliances with neighboring bands. With the rise of dense, sedentary, food-producing populations came the rise of chiefs, kings, and bureaucrats. Such bureaucracies were essential not only to governing large and populous domains but also to maintaining standing armies, sending out fleets of exploration, and organizing wars of conquest. "

― Jared Diamond , Guns, Germs, and Steel: The Fates of Human Societies