From The Myth of Race: The Troubling Persistence of an Unscientific Idea by Robert Wald Sussman, from an long excerpt published in Newsweek:

For the past 500 years, people have been taught how to interpret and understand racism. We have been told that there are very specific things that relate to race, such as intelligence, sexual behavior, birth rates, infant care, work ethics and abilities, personal restraint, lifespan, law-abidingness, aggression, altruism, economic and business practices, family cohesion, and even brain size.

We have learned that races are structured in a hierarchical order and that some races are better than others. Even if you are not a racist, your life is affected by this ordered structure. We are born into a racist society.

What many people do not realize is that this racial structure is not based on reality. Anthropologists have shown for many years now that there is no biological reality to human race. There are no major complex behaviors that directly correlate with what might be considered human “racial” characteristics.