Isn't there a view that mankind originated from Africa?
Eve, the mother of all mankind?
A little more than 10 years ago molecular biologists believed that they had found evidence in human genes that all people share a common female ancestor, dubbed Eve, who lived in Africa about 200,000 years ago. The claim has seemingly been challenged on both genetic and fossil evidence, and it had been supported by a repetition of the same kind of analysis. There is an argument that one would expect all current humans to have one common ancestor based on sampling statistics alone.
Confidence in genetic approaches to this problem should also be tempered by another report. Three British geneticists, led by L. Simon Whitfield, carried out analysis of both mitochondrial DNA and Y chromosome DNA from the same people. The mitochondrial data yielded a time of origin of modern humans between 120,000 and 474,000 years ago. The Y chromosome data indicated the origin was probably between 37,000 and 49,000 years ago. And two more Y chromosome studies using newer techniques and larger sample sizes were reported in "Proceedings of the National Academy of Sciences USA 97 (2000)": report numbers 7354-59 and 7360-65 and they add more evidence for the younger dates. They both support a 50,000 year ago origin for humanity. They also seem to point to a rapid population expansion around 28,000 years ago.
"However, the 50,000 year time may be too long, and the true time may be about 36,525 years, which rounds off to 40,000 years, because it has been shown by Awadalla, Eyre-Walker, and Smith, in Science 286 (24 December 1999) 2524-2525, that "... The assumption that human mitochondrial DNA is inherited from one parent only and therefore does not recombine is questionable. Linkage disequilibrium in human and chimpanzee mitochondrial DNA declines as a function of the distance between sites. This pattern can be attributed to one mechanism only: recombination. ...