[doug from upland]

later advance by humans might have been set in motion by growing population densities that forced some members of the species to push out of Africa.

=======================

What the heck is that about. How dense could the population be at that time?

[exDemMom]

How dense could the population be at that time?

Some of them could be VERY dense.

Oh- You were talking about population numbers, weren't you? Sorry, my bad!