Racist pseudoscience is on the rise—fueling hatred, feeding nationalism, and seeping into our discourse on everything from sports to intelligence. Even the well-intentioned repeat stereotypes based on "science," because cutting-edge genetics are hard to grasp—and all too easy to distort. Paradoxically, misconceptions are multiplying amid today’s unprecedented surge of research on human genetics. We’ve never had a clearer picture of who we are and where we come from, and the science, when accurately understood, is a powerful and definitive ally against racism. But not nearly enough of these findings have made their way into the casual conversations we have about race.