When Europeans arrived at the Cape Africans were pastoralists with agriculture including Sorghum which is a native cereal (especially maize after euro contact). The Koi were hunter gatherers, when the Dutch arrived they also became traders and pastoralists. Their territory was mainly the cape peninsula and spread out along some the western shore of SA. The San (Bushman) were hunter gatherers who lived mainly inland, from the deserts to the Drankensberg.
Although African tribes had already started to arrive in today’s South Africa before Europeans, most only moved down after Europeans arrived. Pushing gradually southwards. Some San were absorbed into the advancing nguni tribes (Xhosa is said to get it clicks for the San), but for the most part it was an act of protracted genocide.
The demise of the Kio was almost entirely caused by the arrival of Europeans at the Cape, small pocks killing the vast majority.
After their cultures had been destroyed the San and the Koi were known by the combined name of Khoisan a small loose collection of people scattered about.
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