Donkeys and river boats carried the West African trade revolution

The commercial system of the western and central Sudan rested on two older developments. The first was full agriculture. Farming produces far more food from the same land than foraging does, which allowed populations to grow, and it created a trade of its own once concentrated town populations had to be fed by farmers who lived elsewhere. The second was technology. Ceramics, the loom weaving of cotton and metallurgy were all in place well before this period, and they gave townspeople something to manufacture and sell. Transport completed it. The donkey was brought west by speakers of Chadic languages and was probably an established pack animal across the southern Sahara before the fifth millennium BCE was out. Donkeys became the main overland carriers of the trade in the two millennia that followed, while boats moved goods along the Niger. Every part of this belongs to Africa: the crops, the ceramics, the looms, the furnaces, the animal, the river and the merchants who used them.

Around 1500 BCE a distinct ceramic tradition, which archaeologists call the Barrancoid series, developed in the middle and lower stretches of the Orinoco valley in what is now Venezuela. Over time its makers moved downriver toward the coast. The people already holding that ground, the communities Rouse files under the Saladero heading, were pushed out of their positions along the river, and out of that disturbance came the subseries he named Cedrosan Saladoid. This is upstream bookkeeping that matters a great deal for Haiti. The Cedrosan Saladoid are the people who a thousand years later carried farming, pottery and village life out of South America and into the Antilles, island by island, until they reached Hispaniola. The population Columbus met in 1492 descended from them. So the chain that ends in the Taino villages of the north coast begins with a pottery style shifting position on a South American river three thousand years earlier.

African potters commonly fire their work in pits dug into the ground. Across the woodland savanna that runs from West Africa to the eastern edge of the Central African Republic, the ground is lateritic and heavy with iron oxide. The archaeologist Merrick Posnansky proposed that firing at high temperature in such pits would have produced small pieces of iron out of the soil itself, repeatedly, until somebody noticed. That is a plausible route to the discovery, and it puts the origin of the technology inside a craft that women had run for thousands of years. What happened next is a familiar sequence. Men took up smelting, built the rituals and symbols that assigned the work to them, and made the arrangement look ancient and proper. Women kept essential roles regardless, mining the ore, and in southern Africa and probably elsewhere shaping the ceramic tuyeres that carried air into the furnaces and the crucibles used for copper. The foundation was women's. The credit went elsewhere.

Across West Africa, in patrilineal and matrilineal societies alike, women have long acted as independent economic and social agents, and the reason is structural. Marriage there did not make a woman a dependent of her husband. In the trades and occupations women carried on, they owned what their labour produced. The largest commercial operators in recent Nigerian history have frequently been women, and the record shows women as major traders in that region in earlier centuries too, Muslim women among them as well as followers of the older Niger-Congo religion. In the territories absorbed in the fourteenth century CE into the kingdom of Benin, the weavers of cotton and raffia cloth were women. That cloth was the main export of the state, through the slave trade era included, and the women who made it controlled access to it and took the profit from it. The wealth of a West African kingdom rested on the enterprise of women, over a wide area and many centuries.