Istwa Nou

The Aquatic way of life held on along the rivers and lakes even as the climate dried, and the expanding pastoral Nilo-Saharan communities appear to have absorbed those groups repeatedly, taking in their political and cultural ideas at the same time. Sacred kingship is the one that carried furthest. It was worked out among people who fished and hunted hippopotamus in a Sahara full of water, and it passed to herders and grain farmers by absorption. The institution that reached its most elaborate form in the divine pharaoh started with fishermen. The two African inventions of pottery grew out of the same transformations. West African potters made cooking vessels from the start. In the eastern Sahara the earliest pots included water carriers as well as cooking ware, and among the herding and grain growing peoples of the mid Holocene the pot became the instrument for boiling grain into porridge. The pot and the porridge are both African, and both are older than their Near Eastern counterparts.

Growing food supported bigger populations, bigger populations needed more land, and land per head went further under cultivation than under foraging, so farming and herding communities kept pushing outward from wherever they began. When people moved, their speech moved with them. Language never stays still. Word meanings drift, new words get coined or borrowed, grammar shifts, and each generation pronounces the sounds a little differently. Once a single ancestral tongue was being spoken in a dozen separated districts, each district accumulated its own changes, mutual understanding broke down over the centuries, and what had been one language became a family of them. That sequence is the engine behind the linguistic map of the world. Food production drove population growth, growth drove expansion, expansion drove diversification, and the shape of each family tree records who went where and when. Niger-Congo, Nilo-Saharan and Afrasian are demographic history written in sound changes, and they cover ground no potsherd can.