Comment by Emma_Goldman

Natural selection acts to increase the fitness of a species relative to its environment. In the human case 'race' is a misnomer. It simply refers to certain features of humans' external appearance, namely melanin. But this does not track any distinct genetic community, which primarily changes as a function of the total sum of environmental pressures, and not just in proportion to UV radiation (i.e. as is true of melanin). It is difficult to take anyone seriously who uses race as a meaningful biological category.