Food production made people, people needed land, and land carried language

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.

Anthropologists building their discipline in the nineteenth century kept finding regions where peoples of quite different origins had spent centuries in contact and had come to share deep features of culture, well past the superficial. Upper Egypt and the eastern Sudan belt were such a region from the sixth millennium BCE onward. Ehret calls the long south to north stretch the Middle Nile Culture Area. The label changes the question of Egyptian origins. Egypt did not come out of one ethnic group or one language community. It came out of a zone of sustained interaction among peoples with different linguistic and historical backgrounds, who over thousands of years of contact built a common stock of practices, ritual forms and material traditions. That makes Egyptian civilisation a regional outcome. To follow it you have to look south, into Nubia and Sudan, because half the culture area lay there and so did the origins of much that museum labels now file as distinctively Egyptian.

The third independent invention of ceramics in the world belongs to Africa. By eleven and a half thousand years ago, around 9500 BCE, people in what is now Mali were making pots. The country in question lies south of the great bend of the Niger, and it falls inside the region where the ancestral form of Niger-Congo would have been spoken, the homeland of the largest language family on the continent today. Twelve thousand kilometres separate it from the Yangtze, which rules out anyone carrying the idea across. This is a dated, located archaeological finding and it has been available for years. Potters in western Africa were firing clay thousands of years before anyone in the Near East or in Europe did. The interesting question is no longer whether it happened. It is why a world history syllabus that has had this information for a generation still opens the story of ceramics in Mesopotamia and never gets to Mali at all.

West Africa produced its own inherited office, the kumo, which linguists trace back to proto-South Volta-Congo around the start of the sixth millennium BCE. Comparative ethnography across a wide band of the continent indicates the holder began as a clan ritual chief in clans that reckoned descent through the mother. His work was spiritual mediation: keeping the community on proper terms with the ancestors. Early on the office picked up civic duties too. The kumo moderated communal meetings, oversaw deliberation about law and custom, and spoke for his people in dealings with other communities. In later centuries the position gained real powers in a number of regions and turned into chiefship or kingship. Set against Nilo-Saharan sacral kingship, this is a different route to authority. One concentrates the spiritual and the temporal in a single divine figure. The other spreads authority across a network of ritual specialists whose standing rests on what they do. Africa was running both experiments at once.