Race is not a biological concept, it is socially constructed. Black Africans do not share a common genetic heritage ( by 'genetic heritage' I'm referring to Y-chromosomal DNA and mitochondrial DNA), in fact, sub-saharan Africa is the most genetically diverse region of the world because human beings have been living there for the longest. People share a similar phenotype not because they share a common genetic heritage but because their ancestors happened to independently adapt features that were advantageous to the climate that they lived in (ie. dark skin and tightly curled hair being advantageous to the sub-saharan African climate). A perfect example of this is the Melanesians of the Pacific who usually have dark skin and tightly curled hair but aren't genetically related to Africans (no more then any other group of homo sapiens) and are not of modern African origin (all homo sapiens are of pre-historic African origin). The first homo sapiens to leave Africa (whose descendents are alive today) were the ancestors of the Aboriginal Australians who have been in Australia for around 40 - 50 000 years, because indiginous Australians have been "away" from Africa the longest, they are the most genetically distinct from African people which means that we have more in common (genetically) with White Europeans then with dark skinned indiginous Australians. From a biological perspective, you can't break a population down any further then sub-species and all living humans not only belong to the same species (homo sapiens) but the same sub-species as well (homo sapiens sapiens). Homo sapiens sapiens (who themselves descend from the extinct sub-species, homo sapiens idaltu) are too young to have evolved into seperate sub-species. The fact is that all human beings are of African descent because homo sapiens are an African species, there's nothing "technical" about this. That being said, I don't consider myself to be a pan-humanist, I think that culture and ethnicity is the most important aspect of human identity. Knowing that race is socially constructed, (not phenotype itself but the idea that you can group people together based on phenotype as though they shared a common heritage) does this alter your racial idealogy in any way or would you just argue that people instinctually identify with other people who resemble them (in terms of phenotype)? Do you think that it is superficial for a Nigerian, (Black) Jamaican and Black American to identify strictly because they are Black (ie. dark skinned with tightly curled hair) or would you advocate unity on the basis that Western Black people are of "recent" African origin? Ethnicity and culture is also socially constructed but culture has more meaning because it denotes a way of life. Culture permeats every aspect of modern human existence (the language you speak/think in, values, traditions, mannerisms etc.). Then again, one can argue that phenotype will always be deeply relevent to human culture.