When I was in Africa, every modern thing I saw there, plumbing, architecture, sewage and water, electricity, roads, etc. EVERYTHING MODERN, was all built and maintained by White People. And as soon as the White people finish whatever they are doing there and leave, it all decays and falls to rubble.
There is NO 20th century city in Africa which is built and run by Black people.
And soon as the murderously racist Black people there kill off what remains of the White People in South Africa, South Africa will decline from a modern world-class European-type nation into a primitive gutted barren wasteland run by brutal tribal warlords competing with each other to take over whatever the White people leave behind.