Latest / The Atlantic Slave Trade: Empire Built on Human Suffering — Fexingo History / The Slave Trade's Forgotten Currency: Cowrie Shells and Manillas
Transcript
- Lucas: So we've talked a lot about the ships, the rebellions, the legal battles. But there's a quieter engine behind the Atlantic slave trade that rarely gets the spotlight: the money itself. Not gold or silver — but shells. And metal bracelets. Luna: Shells? Like, actual seashells? Lucas: Exactly. Cowrie shells, to be precise. The little porcelain-like shells you might see on a beach necklace today. But in the sixteenth and seventeenth centuries, they were the currency of West Africa. And they came from halfway around the world. Lucas: The cowrie, Cypraea moneta, was harvested in the Maldives — a chain of islands in the Indian Ocean. For centuries, locals collected them, bundled them in palm leaves, and traded them across Asia. But when Europeans arrived in the Indian Ocean, they realized these shells could be the key to buying slaves on the African coast. Luna: So the slave trade literally ran on seashells. Lucas: It did. The Dutch and the English started shipping cowries by the ton. The shells were cheap to produce, virtually weightless, and impossible to counterfeit in West Africa. They became the standard currency in markets from the Niger Delta to the Gold Coast. Lucas: Here's a striking number: a single slave might cost the equivalent of forty to fifty thousand cowries. That's a lot of shells. And the traders who brought them made a killing — both from selling the shells and then from selling the people they bought with them. Luna: Wait, but if the shells came from the Maldives, how did they get to Africa without the Europeans just flooding the market? Lucas: Ah, that's the clever and brutal part. The European companies — like the Royal African Company — controlled the supply. They dumped just enough shells to keep demand high, but not so many that they lost value. It was a managed scarcity, kind of like how central banks manage currency today. Lucas: And the Maldives, for their part, were pretty much forced into this. The sultans there had to sell to the Europeans — or face military consequences. So the shells traveled from the Indian Ocean, around the Cape, to Europe, and then to West Africa. A truly global supply chain for a tiny white shell. Luna: That's mind-boggling. But what about the metal bracelets you mentioned? Those were a thing too? Lucas: Oh yes. Those were manillas — horseshoe-shaped bracelets of copper, brass, or bronze. They were used in the Bight of Biafra, around modern-day Nigeria and Cameroon. Manillas were the preferred currency there, especially for buying slaves. They came in different sizes and grades, and the value depended on the metal and the workmanship. Lucas: The Portuguese first introduced manillas, but the British and French later mass-produced them in Birmingham and Nantes. They shipped them by the barrel. One source from the 1700s says that a slave on the Bight of Biafra might cost a hundred and fifty to two hundred manillas of the best quality. That's a lot of brass. Luna: So the Africans weren't just being paid in shells and metal — they were being paid in currency that had no value outside their own markets. That seems deliberate. Lucas: You've hit on something crucial. The cowrie and the manilla were only worth something in Africa. Once the slave ship sailed away, the shells were worthless in Europe. So the Africans were effectively trading human beings for items that couldn't be used to buy anything else in the wider world. It was a one-way economic drain. Lucas: And here's a deeper layer: because the Europeans controlled the supply, they could inflate or deflate the currency at will. When too many cowries entered the market, prices went up — meaning it took more shells to buy the same goods. But the Europeans didn't care, because they were buying slaves with those shells, and the slaves were worth far more across the Atlantic. Lucas: There's a famous account by Olaudah Equiano, who was enslaved as a boy and later wrote his autobiography. He describes how the traders on the coast would count cowries in a specific way — grouping them in sixes or tens — and how the value could change from one village to the next. It was a system designed to confuse and shortchange the sellers. Luna: It kind of makes you wonder — did the African rulers even realize how they were being exploited? Lucas: Some did, and some tried to push back. But the demand for European goods — guns, cloth, alcohol — was so strong that they were trapped. If one king refused to trade, another would. And the guns they bought were often used to capture more slaves to pay for more guns. A vicious cycle. Lucas: Now, I want to pause here for a second. We've been going deep into this history, and it's the kind of thing that doesn't get a lot of airtime elsewhere. That's why we keep making these episodes — and why we don't run ads. No sponsors, no interruptions. Just the story, start to finish. Luna: Yeah, I love that we can talk about this stuff without a commercial every two minutes. It feels like a conversation, not a lecture. Lucas: Exactly. And if that's something you value, and you want to support the work we do, you can buy us a coffee — literally. It's buy me a coffee dot com slash fexingo. No pressure, just a way to keep the show running ad-free. Lucas: But let's get back to the shells and the manillas, because there's a twist. As the eighteenth century went on, the cowrie inflation became so severe that it actually destabilized many African economies. The value of cowries fell by half in some regions. People were drowning in shells that were worth less and less. Luna: So the Europeans basically wrecked the local currency, too. Lucas: That's right. And when the slave trade was finally outlawed in the 1800s, the cowrie and manilla didn't just disappear. They remained in use for decades, well into the colonial period. In fact, the British were still trying to exchange manillas for new coinage in Nigeria as late as the 1940s. Lucas: There's a famous story from 1897 when the British colonial government in Nigeria tried to demonetize the manilla. They launched a campaign to collect and destroy them. But the people who brought them in were given British shillings — and many found the new money confusing. Some even hid their manillas in the ground, waiting for the old days to return. Lucas: That little act of resistance says a lot. The manilla wasn't just currency; it was a symbol of a trade network that had existed for centuries. Replacing it wasn't just economic, it was cultural. Luna: So what happened to all those cowries and manillas in the end? Lucas: Many ended up as scrap metal or buried in the ground. Today, you can find cowrie shells in African markets as tourist trinkets or in religious rituals. And manillas occasionally turn up in museum collections or in earthworks where they were dumped. They're relics of a monetary system that fueled one of history's greatest crimes. Lucas: But the legacy isn't just historical. Some economists argue that the reliance on cowrie and manilla currencies — and the inflation caused by European oversupply — contributed to the economic vulnerabilities that made the Scramble for Africa possible. When the Europeans carved up the continent in 1884, many African economies were already in shambles, partly because their currencies had been so thoroughly undermined. Luna: That's a heavy thought to end on. But it's true — the money itself was a weapon. Lucas: It was. The cowrie shell and the manilla weren't just passive means of exchange. They were instruments of exploitation, designed by and for the slave trade. And understanding that gives us a clearer picture of how the Atlantic system really worked — not just in chains and ships, but in the very coins in people's hands.