Latest / The Atlantic Slave Trade: Empire Built on Human Suffering — Fexingo History / Slave Trade in the Indian Ocean: Zanzibar's Dark Legacy
Transcript
- Lucas: So we've talked a lot about the Atlantic slave trade, but there was another massive system running at the same time, in the Indian Ocean, centered on the island of Zanzibar. It's often called the 'Arab slave trade,' but that's an oversimplification—it involved Omani rulers, Swahili merchants, and European powers too. Luna: Right, I remember you mentioned Zanzibar in passing before. But how big was it really compared to the Atlantic? Lucas: It was enormous. Over the centuries, possibly as many as 5 to 6 million people were taken from East Africa into slavery across the Indian Ocean, the Middle East, and South Asia. The peak was in the 19th century, when Zanzibar became the world's largest slave market. Luna: Wait, really? The world's largest? I always thought it was somewhere in the Americas. Lucas: For that period, yes. The Atlantic trade was winding down by the early 1800s—Britain abolished it in 1807—but the Indian Ocean trade actually intensified. And the key figure behind that was Sultan Said bin Sultan, the Omani ruler who moved his entire court to Zanzibar in 1840. Lucas: He saw Zanzibar's potential. It had a perfect harbor, monsoon winds that connected it to India and Arabia, and a growing demand for cloves. Cloves were incredibly valuable—used for everything from spice to medicine—and they required huge labor forces. Luna: So he built the slave trade to fuel the clove plantations. That's chillingly familiar. Lucas: Exactly. And the scale of it was staggering. By the 1850s, Zanzibar was exporting about 20,000 enslaved people per year. Most were sent to clove and coconut plantations on the island itself, but thousands more were shipped to Persia, Oman, India, and even the French sugar islands in the Indian Ocean. Luna: Where were they captured from? The interior, I assume? Lucas: Yes, from deep in East Africa. The main sources were the Yao people from modern-day Mozambique and Malawi, the Nyamwezi from Tanzania, and the Makua from northern Mozambique. They were captured by local warlords or by traders like Tippu Tip—a name you might have heard. Luna: Tippu Tip? That sounds almost like a nickname. Lucas: It was. His real name was Hamed bin Mohammed el-Murjebi. He was a Swahili-Zanzibari trader who built a huge empire in the Congo basin in the late 1800s. He controlled vast networks of caravans and plantations, and he supplied thousands of slaves to Zanzibar. He was also a writer—he dictated his memoirs, which are a rare firsthand account from a slave trader. Lucas: The caravans themselves were brutal. They would march from the coast into the interior, often for months. Slaves were chained together by the neck, carrying ivory tusks—because the trade was linked: ivory was the other major export. They were fed barely enough to survive, and many died on the way. Luna: How did they treat the enslaved once they reached Zanzibar? Lucas: They were taken to the slave market in Stone Town, the old city. It was a brutal place. Buyers would inspect them like livestock—checking teeth, making them jump, testing their strength. The market was right in the center of town, near the Sultan's palace. It was completely open, not hidden at all. Lucas: Stone Town itself was a strange mix. The sultan's palace, called the Beit al-Sahel, was right there. And nearby was the Anglican Cathedral, built later on the site of the old slave market. The altar now stands where the whipping post once was—a haunting juxtaposition. Luna: Wow. So the cathedral was built specifically to mark that spot? Lucas: Yes, after abolition. The land was bought by the Universities' Mission to Central Africa, and the cathedral was consecrated in 1879. The underground slave chambers—where captives were kept before sale—are still there. You can visit them today. They're called the Mkunazini slave chambers. Luna: So when did Britain actually force abolition in Zanzibar? Lucas: It was a long process. Britain signed treaties with the sultans beginning in 1822, but they were largely ineffective. The real turning point came in 1873, when Sir John Kirk, the British consul, pressured Sultan Barghash bin Said to sign a treaty banning the slave trade outright. Barghash resisted for years, but finally gave in when the Royal Navy blockaded the island. Lucas: Even then, the ban was initially only on the export of slaves, not on domestic slavery. So plantation owners still held people. It wasn't until 1897, under Sultan Hamoud bin Mohammed, that slavery itself was abolished in Zanzibar. That was 60 years after Britain abolished it in its own colonies. Luna: And what about the broader Indian Ocean trade? Did the 1873 treaty end it? Lucas: Not entirely. The Royal Navy patrolled the coast and intercepted slave ships, but the trade shifted to other routes—up the Red Sea, into the interior of Arabia. And the final blow to Zanzibar's role came with the Heligoland-Zanzibar Treaty of 1890, where Britain traded the island of Heligoland to Germany in exchange for control over Zanzibar. After that, the British effectively ran the island and enforced abolition more strictly. Luna: It's strange to think that a spice island was at the center of such a massive human tragedy. Lucas: It really is. Zanzibar today is a tourist destination known for its beautiful beaches and historic Stone Town. But the legacy of the slave trade is still visible—in the architecture, in the demographics, and in that cathedral built on the slave market. It's a reminder that the global economy, even in a place far from the Americas, was built on human suffering. Luna: And it's a story that doesn't get nearly as much attention as the Atlantic trade. Lucas: Exactly. Which is why we wanted to cover it. The Indian Ocean slave trade was a different world in many ways—the monsoons, the island plantations, the Omani sultans—but the exploitation was just as brutal. And it lasted longer. In some places, forms of it continued into the early 20th century. Luna: I'm glad we're talking about it. I think a lot of people don't realize that slavery wasn't just a transatlantic phenomenon. Lucas: Absolutely. And when you look at the global picture—the Atlantic, the Indian Ocean, the trans-Saharan routes—you see that nearly every part of the world was connected by these systems of forced labor. It's a sobering thought, but an important one.