Thomas Sowell, now 93 years old, is one of the most esteemed and prolific authors and social commentators today. Trained as an economist at Harvard and the University of Chicago, he has written more than thirty books, and from 1991 to 2016, he had a nationally syndicated column. Sowell’s readers and admirers include the Harvard psychologist Steven Pinker and the former heavyweight boxing champion Mike Tyson. Pinker has characterized Sowell as the most underrated author in history. He also stated that, “Sowell is a libertarian conservative, which makes him taboo in mainstream intellectual circles, but even those who disagree are...