What is biological is that different people from around the world are genetically more similar to their neighbours than people more distant and people with a similar genetic background tend to look similar.
What is more interesting is not race, but that different human populations around the world are different species that can produce fertile offspring. There are four known living human species; sub-Saharan Africans, Euro/Asians, Melanesian/Australian Aborigines, and African pygmies (there might be some more human species in Africa, but we lack the fossil DNA data to know this). Each one of these different species is a hybrid between ancient sub-Saharan African’s and one of the other homo species that lived on the planet before 50,000 years ago [0].