[muawiyah]

Don't rely too much on the genetic diversity argument. The analysts who determined that DNA shows that the European and Asian ancestry is predominantly that of the San People in Africa ALSO found that there are only 14 major haplogroups in Africa, one of which is that of the San People. The San, in turn are the source of the other 13 groups.

So, let's say there's one race ~ the San People ~ all that does is cut us off from the differences in the other 13 main haplogroups, plus the various subgroups in the Northern hemisphere.

Interesting that ONE offshoot of the San ~ the folks who moved out of Africa some 75,000 years ago, constitutes about 85% of modern humans!

Does that mean that Africa is not good for us? Or does that say something about us?

[allmendream]

Africa is actually a not very good place for humans, and hasn’t been. That is where most human pathogens are found. That is where malaria is such a fact of life that sickle cell anemia is also a fact of life.

[Bernard Marx]

the folks who moved out of Africa some 75,000 years ago, constitutes about 85% of modern humans! Does that mean that Africa is not good for us? Or does that say something about us?

To me it suggests that the genetic "bottleneck" theory related to the explosion of the Toba supervolcano in Indonesia may have validity. Genetic evidence suggests the world's entire human population was reduced to between 1,000 and 10,000 breeding pairs as a result of that calamity about 70,000 years ago. All humans alive today, the theory says, are descended from them. A great deal would depend on where those surviving breeders were located. Maybe they were the San descendants who migrated out of Africa.