jpphilips:

Slaves were human beings with number, forced to labour against their will. Between 1933 (permit me to borrow your statistics) and today, the population growth is in Geometric progression, so no doubt the issue of number is still plausible.
As a matter of fact, the Almajiri population will out swell whatever number of slaves that built the former pyramids if you consider the population we have amassed so far.

Now the remaining issue is forced labor, well, in a society with hungry youths, Labor doesn't need to be forced because very low incentives will be motivation enough.
Don't ask me where the incentives will come from, the slaves were traded not stolen, hence the same money used to buy slaves at the time can as well be used to pay the Almajiris for the same labor output.

With these I can conviniently tell you that your analogy is baseless!!

Yourmy friend are a direct descendant of a traded slave.

. I've laughed so hard I think I may have crapped my pants

History... What we lack in our curriculum

Mutuwa and MagicBishop una weldone ooo......

Don't I just love d way ds bishopmagic xsanguinates his opponents mercilessly wit surgical precision