It's axiomatic: Discrimination accounts for racial inequality in our society, and government action is needed to fix this injustice. Not so fast, says economist Thomas Sowell. There are many causes of inequality, and discrimination often explains less than we think it does. Furthermore, discrimination is most powerful when it's state policy, because government can force someone else to pay the price of discrimination. Sowell: Yes. And they are a tremendous threat to the more militant blacks on campus who make a determined effort to keep them out. I mentioned in that book a young woman who did very well on...