McGrath, you explain it much better than I do.

Wolfgang - I can talk about religion and sex because I believe they are real. I do not believe that race has any basis in reality and is simply a means of oppression. I do not want to use oppressive terms of reference.

You may disagree, but it is my understanding the race does not exist and that, genetically speaking, we are related to one ancient, African mother. Our difference are indeed due to biogeographical diversity.