“The energy needed to refute BS is of an order of magnitude greater than the effort needed to produce the BS in the first place. ”
Brandolini’s law
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Advances which permit this norm to be exceeded -- here and there, now and then -- are the work of an extremely small minority, frequently despised, often condemned, and almost always opposed by all right-thinking people. Whenever this tiny minority is kept from creating, or (as sometimes happens) is driven out of a society, the people then slip back into abject poverty. This is known as "bad luck." -- Robert A. Heinlein
On the North River 
Doctor Locketopus
Note that sub-Saharan Africa is projected to exceed 4 billion people around the end of the century.
Not going to happen unless (as is entirely possible) the native population has been replaced with people of Chinese descent.
China is gearing up to play Chinese and Africans (like Cowboys and Indians, except more brutal and with absolutely no residual guilt afterwards).