posted on Apr, 11 2004 @ 08:12 PM
The writer did a BAD job of explaining the concept.
Men didn't vanish, or arise suddenly and humans weren't reproducing by parthogenesis. There are plenty of fossils of male skeletons to match the
fossils of female skeletons.
Nor have they conclusively traced all men back to a single man.
(I know why the writer sounds confusing... because now that I look at it, it's perfectly clear to me but trying to explain it without a long hour
lecture will be a challenge.)
Indeed, other men sired the woman that the "ancestral Y-chromosome Adam" bred with... and sired "Adam." So think of his tribe; perhaps 20 or 30
nomad-hunters, one of many groups. It is possible for Adam and the male members of the small band or tribe to die (while off hunting, and perhaps not
all at the same time) leaving only Adam's children plus the female children of the other hunters alive (they would NOT carry the Y chromosme because
So we have Adam's sons and their wives and their children who grow and prosper... and the group becomes larger over time. The male members get wives
from other tribes and they grow into a fairly large group. As wars and disease kill off the men of neighboring tribes, the Sons and Grandsons and
Great Grandsons of Adam can come in and take those women and perpetuate the line simply by good fortune and being very ...err... popular with the
A genetic advantage (such as resistance to flu (much more deadly back then) would be enough to tip the balance.... or the holding of certain types of
technology (really good arrows and bows as an example or good hunting techniques or early agriculture or domestication of animals,
Any social or technological or biological advantage gives them the edge in survival.
No huge disasters are required; only lucky breaks and popular males. (I've WAY oversimplified things but I hope this is clearer.)