Probably the major issue with these countries is that they were decolonized too quickly. Belgium packed up quickly and left, and Congo went to shit ten days later. The countries that colonized them did nothing to prepare them for independence; though some countries did do more than others.
Notice, for example; the countries that were colonized by the French are in far worse shape than countries that were colonized by the British.
When they say "forced" marriage, do they mean - or does that include - arranged marriages?
Personally, I see nothing wrong with it if the culture allows for it. I mean, there are benefits to that. For example... I don't think dudes engage in self-destructive behavior in pursuit of poon, because a man's "status" among his peers wouldn't be based on how many chicks he can lay.
In my opinion, sex is overrated (I like it as much as the next guy; but it's not the end all be all that society makes it out to be).