Repost from the old site.
A new study of African genes shines some new light on the Out of Africa Hypothesis, which is now the dominant view. Most of the Multiregionalists are now isolated into racial or ethnic chauvinists, each of whom wants to believe that they came from a different kind of monkey. This includes European, Indonesian, Japanese and Chinese chauvinists. It’s all nonsense, and Out of Africa reigns.
Previously, the oldest human lineages were in the Khoisan or Bushmen, where they go back from 90,000-150,000 years. During this period, six separate extant lineages existed in parallel in the proto-Khoisan.
However, recent data has shown that the oldest human genes of all are in East Africans from Kenya and Tanzania.
When humans left Africa 60-70,000 years before present (YBP) from East Africa via the Gulf of Aden to Yemen, and from there along the Indian Ocean to India, SE Asia and Australia and New Guinea, there were at least 40 separate lineages going in Africa, each of which has continued to this day.
Finally, 40,000 YBP, newer, more modern lineages entered the Khoisan pool. The evolution of humans in Africa involves many lineages that were isolated from one another and were evolving separately.
A very early split in modern humans of two separate lines is suggested. This occurred from 140-210,000 years ago in Africa, and may have occurred near Lake Victoria, but we do not really know for sure. One line went to South Africa and the other line went to East Africa – Ethiopia, etc.
About 144,000 years ago, a South African line entered the gene pool in Ethiopia. This line then creates a joint East-South African line that later traverses westward from Ethiopia to the Sahara, West and North Africa. Although there has long been debate about whether the cradle of human development in Africa was in South or East Africa, as they were both contenders, the debate now appears to be settled. Humans arose about 180,000 years ago from a Southwest African site around Namibia.
Genes in Africa have been found in the Khoisan dating back 132,000 years, and they have not been found in any other groups of humans anywhere else. That proves Out of Africa right there.
However, we should note that the ancient South African humans did not look like either modern day Khoisan or Bantus.
Of the 40 separate lineages going in Africa 40,000 YBP, only two went on to become all modern non-Africans. Pygmies go back to a split with other Africans 70,000 YBP. The earliest male line among humans appears in the Khoisan in large numbers, but hardly exists outside of Africa anymore, as it has probably been drowned out by newer lines. Two great graphics are here.
The modern-day ancestors of the Africans who left Africa to populate the world are found in the Sudanese, Ethiopians and also the Bushmen. Note that the Bushmen once extended all over East Africa, and a few isolated groups like the Sandawe are still extant in Kenya.
In my opinion, it was Blacks in this part of Africa, the ancestors of the Tutsi and Masai, who left Africa 45,000 years ago, probably via the Horn once again, moved into Iran and the Caucasus, and went on to birth the Caucasian race after they received proto-Asian inputs from China.