It has been almost 20 years since Shelby Steele published the best-known of his five books on race, “White Guilt: How Blacks and Whites Together Destroyed the Promise of the Civil Rights Era.” A lot has happened since. In 2006 “we hadn’t had President Obama, Ferguson, Trump, George Floyd, DEI, Black Lives Matter, President Biden,” Mr. Steele says. “We also hadn’t had Oct. 7.” Mr. Steele, 79, is one of America’s foremost black conservative thinkers, recently retired as a senior fellow at Stanford’s Hoover Institution. He is still hard at work, on a film made by his son, Eli Steele,...