Over the last, terrible schoolyear, appreciators of educational freedom and excellence can at least take heart that their cause is winning the esteem of many parents. This owes not only to the poor behavior of American educrats and their unionized minions, but also to the spiritedness of school choice advocates—noteworthy among them, the masterly economist Thomas Sowell. When Sowell turned 90 a year ago, he concurrently published Charter Schools and Their Enemies, a superb book among a superb oeuvre. Lovers of free enterprise and public virtue should immerse themselves in the latter, and in Jason L. Riley’s splendid new Sowell...