America’s reckoning on systemic racism has made interest in anti-racism books and workshops soar, but does this kind of training work? The New York Times spoke with Robin DiAngelo, author of “White Fragility,” and Courageous Conversations workshop founder Glenn Singleton. According to the Times, both are “confident that the lessons they teach are the right ones.” But a Harvard sociologist says research suggests diversity training could backfire because it “activates stereotypes.” And professors who analyzed 1,000 anti-bias programs found that as “study quality goes up, the effect size dwindles.”