Sometimes it is claimed by those who argue that race is just a social construct that the human genome project shows that because people share roughly 99% of their genes in common, that there are no races. This is silly.
Race differences show up early in life.
Unless one is a religious fundamentalist and believes that man was created in the image and likeness of God, it is foolish to believe that human beings are exempt from biological classification and the laws of evolution that apply to all other life forms.