“In the end, we like policies like affirmative action not so much because they solve the problem of racism but because they tell us that racism is the problem we need to solve. And the reason we like the problem of racism is that solving it just requires us to give up our prejudices, whereas solving the problem of economic inequality might require something more — it might require us to give up our money. It’s not surprising that universities of the upper middle class should want their students to feel comfortable. What is surprising is that diversity should have become the hallmark of liberalism.”