I wish I could find a link, but the information's so ancient I doubt if it exists.
I recall reading an article in the newspaper one time, circa 1979-1980, describing a United Nations study on conditions in Africa.
United Nations, remember.
The news article had a chart of conditions in each individual country.
When it came to things such as medical care, longevity, wages, nutrition, and housing, Rhodesia was number one, followed by number two South Africa.
Rhodesia had always been out of the United Nations, considered an "outlaw" country because of its white-minority rule, and South Africa about this time was in deep doo-doo with the United Nations because of its white-minority rule.
This is not to condone minority rule; it's more so to point out that conditions in black-ruled Africa must've been Hell, if Rhodesia and South Africa were the best.
And as we all know, conditions in former Rhodesia, now Zimbawbe, have deteriorated catastrophically for those of African derivation living there, and while I don't know for sure, I suspect medical care, longevity, wages, nutrition, and housing have since deteriorated for those of African derivation living in South Africa today.
It's not about color, really; it's all about rule of law as compared with rule and ruin by corruption. The British may have left their white wigs and colorful Parliamentary robes to be adopted by judges in Ghana, but they left way too prematurely, without instilling a respect for the law in these people.