IIRC, Botswana continues to function and is stable. How is it “obsolete”?
Moreover, just one example of blacks governing themselves and relatively flourishing, especially considering the initial severe poverty and lack of education, is sufficient to falsify the view that they cannot.
As for “living there”, frankly there are several States in the Union I’ve no desire to visit, never mind do business or live there. I’m a Texan and consider it a mistake to have ceased to have identified with and been loyal to your State.
Name another place, then.