Am rereading THE WASHING OF THE SPEARS by Morris. When the Europeans first landed in South Africa, there were NO BLACKS there. Bushmen and Hottentots, but NO BLACKS. they were still far to the Northeast. Inter-tribal warfare also emptied all blacks from the area later to be known as the Orange Free State, so the Boers found an empty land to settle.
Then around 1817, SHAKA sent his Impis out, driving all blacks before him down toward South Africa. Eventually defeated in the 1880s, they began a slow infiltration of SA, just like the USA being infiltrated from Mexico.
Now blacks control South Africa, a land they never inhabited in the past, and the Boer is on the ropes.
Bingo, Yahtzee, our survey said; a lot of people will be dead.