Ibram X. Kendi became a star when his book How to Be an Antiracist landed on the bestseller list. Kendi, who's now a Professor of History at Howard University, gained a reputation as a racial-reconciliation guru. He's also the recipient of a MacArthur Fellowship which is known as the genius award. Now, Kendi has written a book called Chain of Ideas: The Origins of Our Authoritarian Age. It focuses on a scary idea called the Great Replacement theory which insists that white people are being deliberately replaced by non-white immigrants. We talk about conspiracy theories, race and what that X stands for in the middle of his name. "Now What?' is produced with the help of Steve Zimmer, Lucy Little and Jackie Schwartz. Audio production is by Nick Ciavatta.