Latest / The History of Portugal: The Small Nation That Built a Global Empire — Fexingo History / The Portuguese Slave Trade: Empire, Commerce, and Human Cost
Transcript
- Lucas: So we've talked a lot about the Portuguese empire — the ships, the forts, the trade routes. But there's a huge part of this story that we've only hinted at, and I think it's time to dig into it directly. Luna: You mean the slave trade? Lucas: Exactly. Portugal was actually the first European power to engage in the transatlantic slave trade on a significant scale, long before the British or the Dutch. It starts almost as soon as the Portuguese reach West Africa. In 1441, a captain named Antão Gonçalves captured a handful of Africans near Cape Branco and brought them back to Lagos. Prince Henry the Navigator was thrilled — not just because of the money, but because he saw it as a way to gather information about the interior. Luna: Wait — so the very first slave raids were also intelligence missions? Lucas: In part, yes. The Portuguese wanted to know about trade routes, kingdoms, gold sources. But very quickly, the economic motive took over. By the 1450s, they had established a feitoria — a trading post — on the island of Arguim, off the coast of modern Mauritania. That became a hub for trading gold, spices, and slaves. The slaves at first were often Berbers or Guanches from the Canary Islands, but soon it shifted to Sub-Saharan Africans. Luna: So the pattern we know from later centuries — it starts right here. Lucas: Exactly. And the scale grew quickly. By the end of the 15th century, the Portuguese were transporting about 1,000 enslaved people per year. That might sound small compared to the 18th century, but it was enormous for the time. They were using the same infrastructure we've talked about — the Casa da Índia, the cartaz system — to manage the slave trade alongside the spice trade. Luna: So the same office that managed pepper and cinnamon — also managed human beings. Lucas: That's right. The Casa da Índia issued licenses for slave ships, collected taxes on each captive, and kept records. It was a state-run operation, though private traders also participated under royal license. The destination was often the sugar plantations on the island of São Tomé, which became a testing ground for the Atlantic plantation system. Luna: And then Brazil — once they colonize that. Lucas: Exactly. Brazil becomes the main destination after 1550. But even before that, the Portuguese were selling slaves to Spanish colonies, to other European traders, and to African elites themselves. Because the slave trade wasn't just Europeans capturing people — they were buying from African kingdoms who were already enslaving their enemies. Luna: That's a point that often gets simplified. Lucas: It is. The Portuguese didn't march inland and capture people themselves for the most part. They established coastal forts and feitorias, and African rulers brought enslaved people to trade. The Kingdom of Kongo, for example, initially traded slaves for European goods, and their king, Afonso I, even wrote letters to King Manuel I of Portugal complaining about the behavior of Portuguese traders. Luna: Wait — a king complaining about the slave trade to the king of Portugal? Lucas: Yes, and it's a fascinating document. Afonso I wrote in 1526 that Portuguese merchants were capturing free people — even nobles — and selling them. He asked Manuel to stop it. But the trade was too profitable. The Portuguese response was basically: 'We'll look into it.' Nothing changed. Luna: So the empire's appetite for slaves overrode any moral concerns. Lucas: For the most part. There were some voices of dissent — missionaries sometimes criticized the trade, and a few royal decrees tried to regulate it — but the economic engine was unstoppable. By the 1600s, the Portuguese were shipping around 15,000 enslaved Africans per year to Brazil alone. The numbers are staggering. Luna: And that's before the Dutch and English really get going. Lucas: Exactly. The Portuguese dominated the Atlantic slave trade for most of the 16th century. And it wasn't just the Atlantic — they also had a slave trade in the Indian Ocean, moving people from East Africa to India, Arabia, and even to the Portuguese fortresses in Malacca. The island of Mozambique, which we covered in episode 143, was a major hub for that. Luna: So the slave trade was truly global for Portugal. Lucas: It was. And it's important to acknowledge this because it's part of the same empire we've been celebrating for its navigation and trade. The caravels that rounded the Cape of Good Hope also carried enslaved people. The feitorias that traded in spices also traded in human beings. Luna: Yeah — and I think that's something that gets lost in some of the more romantic retellings. Lucas: That's one reason I wanted to do this episode. The Portuguese Empire was built on a combination of sea power, commercial savvy, and violence — and the slave trade was a core part of that from almost the very beginning. We can't understand the empire's wealth without understanding its human cost. Luna: And this is also something that listeners can explore further on their own, if they want. Lucas: Absolutely. And speaking of that — we keep these episodes free of ads, because we want the history to speak for itself. If you find value in that, and you'd like to support the show, there's a link at buy me a coffee dot com slash fexingo. It's how we keep this going without any commercial interruptions. Thanks for being here. Luna: Yeah, it really does make a difference. So — back to the slave trade. What was the Portuguese justification for it at the time? Lucas: Great question. The Portuguese used several justifications. One was religious — they argued that enslaving Africans was a way to bring them into contact with Christianity. Another was that it was a legitimate form of commerce, the same as trading in any other commodity. And there was a racial element too — they began to see Africans as inherently inferior, which made it easier to justify. Luna: So the same empire that sponsored missionaries also used Christianity as a cover for the slave trade. Lucas: Exactly. There's a real contradiction there. But you also see resistance from the enslaved — ship revolts, escapes, and the formation of communities of runaways called quilombos in Brazil. The most famous is Palmares, which lasted for most of the 17th century. Luna: Palmares — that's the one that is sometimes called the first free territory in the Americas. Lucas: Right. It was a confederation of settlements, or mocambos, with a population of thousands. They fought off Portuguese and Dutch attacks for decades. It's an incredible story of resistance. But we'll save that for another episode. Luna: So to sum up — the Portuguese slave trade wasn't an afterthought. It was central to the empire's economy from the 1440s onward. Lucas: Absolutely central. And it's a reminder that every great historical narrative has a shadow side. The Portuguese caravels and feitorias were tools of exploration, but also of exploitation. Understanding that makes the story of the empire more complete — and more honest.