Reply #74: IMO its more correct to say "classical racial categories do not exist".

[Odin2005]

Sub-Saharan Africans are a good example. A West African looks a lot different than an East African, and both look different than Bushmen of southern Africa, and all three are quite distinct genetically. The East Africans drove the racialist physical anthropologists of 100 years ago crazy because their skull proportions were very similar to those of "white" people. Human populations have not been isolated long enough for human genetic diversity to "congeal" into distinct populations with definite boundaries, making racial "boundaries" drawn on a map completely arbitrary and more often than not based on stereotyped physical features that may not be useful form a population genetics standpoint.