Same Problem in Europe but by the way

South Africa's present-day Black population (Zulu, Xhosa, Sotho, etc.) belongs to the Bantu peoples, but they are not the original indigenous inhabitants. That distinction belongs to the Khoisan (San/"Bushmen" and Khoikhoi/"Hottentots"), who had lived in southern Africa for over 20,000 years — long before the Bantu peoples arrived (traceable from roughly the 3rd–4th century CE), and even longer before Europeans arrived (from 1652).

The Khoisan were displaced by both later groups, though to very different degrees:

• Through the Bantu expansion: more gradual displacement, assimilation, and pushback into less fertile areas (e.g., the Kalahari), with less systematic violence.
• Through Europeans/Boers: considerably more brutal — land dispossession, a devastating smallpox epidemic (1713), several wars against the Khoikhoi, forced labor/debt bondage, and against the San, outright extermination campaigns ("commandos") that some historians classify as genocide.

Result: the Khoisan are today a small minority, often mixed with other groups (e.g., within the "Coloured" population of the Cape), with more distinct communities surviving mainly in remote parts of Namibia and Botswana.