I'm guessing that the answer will be proportional to the amount of foreign aid they receive, both intellectual and otherwise. Even with their incredible wealth of gold, diamonds and other resources they seem unable to make a go of it on their own (without breathtaking levels of crime, mayhem and socioeconomic problems).
This reminds me of the 'white flight' that occurs in many US "inner cities" when the social fabric starts to unravel due to the effects of certain new populations.
I don't think it has much to do with race, frankly. It's liberalism that allows the sores to fester beyond redemption. So in a sense, minority populations cut their own throats by voting for commie douche bags at every chance.
Cultural/ethnic differences have far-reaching consequences.