Note that my post just above was basically an off-the-cuff response to what I felt was a ludicrously wrong assumption buried in the OP. I'm not an expert on African history, and I could be wrong. I think that I gave the OP's idea about the level of refutation it deserved, but I should have qualified my statements more ("I'd guess..."), so I certainly didn't deserve 5 upvotes for this (5 points currently; I deserve 1-3 at most).