One obsolete example does not make my statement "utterly untrue". If you can't think of any current black governed nation where you'd like to live, then I'd say that I'm accurate. Only if there were several examples of successful black nations could my statement be "utterly untrue".
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.