From a scientific point of view, perhaps the only people you might consider to be non-immigrants would be some Khoe-San-speaking groups in southern Africa , explains Austin Reynolds , an assistant professor of anthropology at Baylor University in Texas specializing in Genetics of human populations.
The Khoe-San designation refers to certain African communities in the areas of Botswana, Namibia, Angola, and South Africa that speak similar languages with distinctive consonants.
Last genetically aboriginal people
Khoisan, Khoisan or Khoisanid are terms that define an important African population group in a cultural, ethnic, linguistic and racial sense; It comes from the union of Khoi (Khoikhoi) and San, main groups that speak some of the Khoisan languages, characterized by incorporating clicking sounds.
There are two main factors that indicate that Khoe-San groups may be non-migratory descendants of the original humans : they live in the place where humans likely first appeared, and they possess a great deal of genetic diversity.
This happens because some types of genomes came from this place, but in the original site there were more.
However, despite the proximity of the Khoe-San groups to the proverbial ‘cradle of mankind’ and their significant genetic diversity, identifying them as the last genetically aboriginal peoples is not straightforward .
First, researchers are not sure that southern Africa is the cradle of humanity. Some scientists think that humans first evolved in East Africa.
Other researchers do not believe that there are people left on Earth who are not, scientifically at least, immigrants. That is, all human populations have been in contact with others , including the Khoe-San.