And is that related to the (fairly) recent assertion by evolutionary biologists that the human race cannot be traced back to a number fewer than 10,000? I haven't really looked into the details, but it occurred to me that the human race may have gone thrugh quite a few "chokepoints" at which times there were significant die-off, with the survival of a relative handful who then became the progenitors of the human race.
All of them would still have had --- if you went well back before the choke-point event --- the same ancestors, even if they were, so to speak, "Mitochondrial Eve" and "Y-Chromosome Adam". Thus all present humans of whatever ethnos are the same species, and thus spring from the same genetic ancestors, with subsequent spread and variation.
I have no idea if the population chokepoint referred to by the evolutioonary biologists is the same thing as the Late Pleostocene event, or even related; nor do I know where to put these events on a time line, although I am supposing it's a sensible time-line comprising only a few million years.
Can you (or some other well-informed FReeper) give me a clue here?