The expansion of Luba and Lunda peoples across Central Africa (roughly 15th–19th centuries) was driven by a convergence of factors:
Originating in the Upemba Depression (modern DRC), growing populations outstripped local carrying capacity, prompting dispersal for new agricultural land.
In the 16th century, the Luba Kingdom was shattered by the Songye. Refugees fled, spreading Luba political models (sacred kingship, bureaucracy) which were adopted/adapted by new groups, including the Lunda.
Luba/Lunda became master long-distance traders—linking the Copperbelt, Atlantic, and Indian Ocean networks. They traded copper, iron, ivory, salt, raffia cloth, and slaves. Control of trade routes fueled state formation.
Both groups participated actively—capturing and selling slaves to Portuguese, Ovimbundu, and Arab-Swahili traders. This brought firearms and luxury goods, strengthening elites but also fueling internecine warfare and destabilization.
The migration created a shared political culture across Katanga, Kasai, northern Zambia, and Angola. Luba/Lunda institutions influenced later states (Yeke, Kazembe). The slave trade's demographic and social wounds persist.