That's how they've overcome the problems from harsh living. They outbreed them, and life is cheap. I'm not sure what you mean by Nigeria.
oh...just that Nigeria is huge and overpopulating like rabbits as an example even after brutal civil wars and susbstandard living etc.
we here and in Europe have grown soft as putty and aim to underbreed ourselves into extinction it appears.
I naturally have done my part to try to keep my tribe afloat.....it was tuff but someone had to do it.