The settling of South Africa was like the settling of America in one respect. The native population of khoi-san or bushmen was reduced by new diseases originating with the invaders, in tjhis case the Dutchmen and Huguenots pushing from the south and the Bantu pushing in from the north. America had competing invaders, too, but in the north only the English provided the numbers to prevail.
Well, now we can watch the current invasion of North America from the south and see how that goes.