How did the Yao and Swahili-speaking traders participate in the slave trade in Malawi?

Between 1830 and 1860, Swahili-speaking traders and the Yao people became dominant forces in the Malawi region, playing a central role in the slave trade as demand grew on Africa’s east coast.12

The Yao, who had been established ivory traders since the 17th century, transitioned into slave raiding by acquiring firearms from Arab traders. By establishing powerful polities under military and commercial leaders, they subjugated local agriculturalists, such as the Chewa and Manganja peoples of the Shire Highlands, to secure captives.34

Swahili-speaking traders, including the influential Jumbe at Nkhotakota, exercised significant military and political jurisdiction over trade routes. These groups created spheres of influence where they acted as a ruling class, often operating from strategically placed commercial centers. This era of exploitation caused widespread devastation, forcing many local populations into stockaded villages for protection and fundamentally transforming the region's social and political landscape. The slave trade was a profound violation of human dignity, and its legacy remains a somber chapter in the history of the region.123