If, on the other hand, racial differences do exist, some differences would be good for society and some differences would be bad for society. Some races would be taller. Some races would be more artistic. Some races would be more intellegent. Some races would be more civilized.
Defining differences in race, even on a DNA scale, can only get a person in big trouble with the PC crowd.
By the way I believe we are all one race, created in the image of God. Please don't ask me what God looks like. I don't know.