John Maynard Keynes was twitted with changing his mind. He replied, "When the facts change, I change my opinion. What do you do, sir?" . . . And I realized that the time had come for me to avow my participation in that America in which I chose to live, and that that country was not a schoolroom teaching values, but a marketplace. . . . Aha," you will say, and you are right. I began reading not only the economics of Thomas Sowell (our greatest contemporary philosopher) but Milton Friedman, Paul Johnson, and Shelby Steele, and a host of...