In the wake of the Supreme Court's recent decision to uphold university admissions preferences, affirmative action remains a deeply divisive issue. But recent research shows that college admissions preferences do not offer even the practical benefits claimed by their supporters. Because preferences do not help minority students, policymakers and administrators of all political persuasions should oppose their use. Affirmative action defenders frequently and correctly tout the importance of college to the goal of improving life prospects. But preferences at selective schools have not increased college access. They cannot do so because most minority students leave high school without the minimum...