Ezana of Aksum became Christian centuries before most of Europe

Buddhism, Christianity and later Islam became world religions by travelling the trade routes. Buddhism spread across southern and eastern Asia along the paths of expanding commerce. Manicheism, proclaimed by Mani in Sassanian Persia in the middle of the third century, went west to the Roman empire and east through interior Asia as far as China. Judaism took hold in southern Arabia in the early first millennium CE along the land and sea routes of the peninsula. Christianity was in the Horn of Africa and in India before the fourth century CE, usually brought by merchants. Hinduism travelled the Indian Ocean links into what is now Indonesia. Islam later crossed the Sahara to West Africa and sailed to Indonesia, again mostly through trading believers. Aksum is the case worth naming. King Ezana converted in the fourth century CE, and Coptic Christianity is still the faith of millions of Ethiopians and Eritreans. Augustine of Canterbury landed in Kent in 597 to begin converting the Anglo-Saxons.

Excavations at the Corinthia III site in Cuba turned up some of the earliest known Archaic Age pottery in the Caribbean. The find matters because the standard scheme awards pottery to the Ceramic Age migrations that arrived later out of South America, with Archaic peoples cast as foragers who did without it. The Cuban vessels show people working clay well before those migrations reached the island, alongside a move towards more settled living in the Late Archaic. Keegan and Hofman use the case against the period boundaries themselves. Archaeological ages are labels applied afterwards by researchers dividing up a continuum, and the material keeps crossing the lines drawn for it. What the Corinthia III pottery records is a wide range of practice across the archipelago, with communities inventing and adopting at their own pace. The people of the islands were doing their own experimenting, on their own schedule, for centuries before anyone brought them anything.

Arab armies took Egypt in 642 and pushed south against the Christian kingdoms of the Upper Nile. Nubia fought hard and had little gold or grain worth seizing, so in 652 the two sides settled on terms. No Muslim would enter the country. In return Nubia would hand over a fixed number of enslaved people every year, receiving other goods in exchange. The agreement was called the Baqt and it appears to have held for several hundred years. Under its shelter the kingdoms of Makuria, whose capital stood at Dongola, and Alwa, centred on Soba near modern Khartoum, built cathedrals and monasteries at Faras, Qasr Ibrim, Sai and elsewhere and covered their walls with paintings. This is one of the oldest recorded arrangements in which an African state agreed to deliver human beings on a schedule as the price of being left alone, and it ran for centuries before any European ship reached the Atlantic coast.

The Council of Nicaea met in 325 CE to settle what Christians were required to believe about the nature of Christ. The argument was carried by Alexander, the Egyptian patriarch of Alexandria, and by his student Athanasius, who between them defeated the position that Christ was a created being. Out of the council came the doctrine of the Trinity and the statement of belief still recited as the Nicene Creed. Every later century of Christian theology in Europe was built on that foundation, and it was fixed in place by two men from Egypt. The other decisive figure of the period was also African. Augustine was born in the fourth century at Hippo, in what is now Algeria, of Amazigh descent, and his writing on sin, grace, predestination and the standing of the church shaped Catholic doctrine for sixteen hundred years and handed the Protestant reformers their arguments as well. He learned his trade inside an African intellectual tradition that had already produced Tertullian and Cyprian.