I've been browsing randomly through boredom most of southern Africa's Wikipedia pages, and I find a lot of mention of the British colonies in the area being proposed for joining South Africa at one time for another, or in Namibia's case, being ruled as a more-or-less province till 1991.
What if South Africa took in Namibia proper and all the other proposed additions-Lesthoso, Zimbabwe, Zambia, Mawali, Botswana, and Swaziland as formal provinces/incorporated into South Africa proper? How likely would it be to get all this into one state? Or at least parts?
I'm interested in Arpethied's various butterflies with an even greater black population and in turn how this Greater South Africa would deal with more whites, as well as how much more economically powerful it may be with South Africa's economic strength having a much larger territory to deal with.