Ehret assembles archaeological and historical linguistic evidence into a continuous account of Africa from the deep past to the early centuries CE, arguing that the continent belongs inside world history rather than at its margins, a misplacement he traces to the catastrophes of recent centuries.

The chapters on technology make the case concretely. Africans invented ceramics more than eleven thousand years ago, wove cotton earlier than anyone else, and were smelting iron at least four thousand years back, with women prominent among the innovators. Agricultural invention followed between the ninth and seventh millennia BCE, and on balance Africa exported more of it to Eurasia than it took in, including a dozen staple crops and the domesticated donkey.

Later sections take up long-distance trade and the merchant class it produced, the African foundations of Egyptian culture and belief, early Christianity on the continent, and how a revised periodisation might carry all of this into global history.