The East African Slave Trade

What It Covers

The East African slave trade, centered on the Indian Ocean and Zanzibar, predates the Transatlantic trade by nearly 1,000 years, enslaved comparable numbers of people, and continued operating well into the twentieth century under Arab and Omani networks.

Key Questions Answered

• •Scale and duration: The East African slave trade originated in the 7th century, peaked in the 18th–19th centuries with 40,000–50,000 people passing through Zanzibar annually, and only formally ended in the early 20th century—outlasting the Transatlantic trade by decades.
• •Mortality on the routes: Overland marches to the coast and Trans-Saharan caravan crossings killed as many people as they delivered. For every enslaved person who reached the coast alive, roughly one or more died en route, making total death tolls far exceed enslavement figures.
• •Gender dynamics differed sharply: Unlike the Transatlantic trade's preference for male labor, Arab merchants prioritized women and girls as concubines and harem members, selling them at twice the price of men and at a 3-to-1 ratio, shaping entirely different demographic and social consequences.
• •Islam as partial protection—then not: Converting to Islam initially shielded Africans from enslavement, since Islamic law prohibited enslaving fellow Muslims. However, by the 19th century this protection collapsed, with African Muslims routinely captured and sold regardless of their religious status.