[Aquinasfan]

But what is known is that we don't all descend from a 6000 year old pair of common ancestors, or even a single pair of individuals at any time.

The 6000 years I get. The single pair of individuals I don't get.

[Right Wing Professor]

Because if we were descended from a single pair of individuals, the 'clock' on our mitochondria, our somatic chromosome DNA and our sex chromosome DNA should read about the same.

As I read the Bible, in any case, we should have common descent from Noah, who should be our last common paternal ancestor; and the major racial trifurcation should occur within one generation at the time of the sons of Noah. None of this is compatible with human genetics. The closest we get to recent common somatic chromosome ancestry is the bottleneck between 50 and 100 thousand years ago, and nobody thinks that bottleneck was two individuals, one male, one female.