Why demand for enslaved people never ended
An ordinary product eventually saturates the market: you buy it, and then you do not need more. Plantations worked differently. On the Caribbean sugar islands and in Brazil, people died faster than they were born: grueling labor, unfamiliar diseases, and mostly young men were transported. The workforce did not replenish itself, so losses were replaced with new purchases - and demand never ended.
If you pictured the slave trade mainly as the cotton-growing US South, that is only a small part of the picture. About 12.5 million people were put on ships, and around 10.7 million reached the Americas - and the overwhelming majority went not to cotton, but to sugar and coffee plantations in the Caribbean and Brazil.
Where people transported across the Atlantic ended up
It was not only about the owners' cruelty, but also demographics. Where the population eventually began to grow on its own, imports became unnecessary. Where it did not, ships were needed again and again - for exactly as many years as the plantations operated.
Profits were spread across three continents
The trade was not run by captains alone. Ordinary European workshops made the cloth, metal goods, and guns used for exchange. Local African states and intermediaries supplied captives to the coast: Europeans rarely went deep into the continent, and they did not carry out the capture or delivery to the shore. And ports, shipyards, and insurance depended on the return cargo - sugar, coffee, and tobacco.
About 8 out of every 10 people transported were put on ships after 1700
So the machine was not running out of steam by the end: its biggest decades came in the late 18th century, just a few years before the British ban of 1807. The industry was legal - with contracts, insurance, and courts - and leaving it alone simply meant giving your share to a competitor.
People often say it had outlived itself. The evidence points more the other way: by the time of the ban, the trade was still profitable, and ending it cost Britain dearly - for decades afterward, its navy intercepted foreign ships off the coast of Africa. The debate has continued since the 1940s and remains unresolved, but the balance now favors those who see abolition as a political decision, not the result of losses.
"The slave trade ended because it stopped being profitable" - weak evidence
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Sources
- Estimates of voyages and people: the Slave Voyages database (Trans-Atlantic Slave Trade Database). Debate on the causes of abolition: Eric Williams, Capitalism and Slavery (1944), and Seymour Drescher, Econocide (1977)