Charles Murray, co-author of *The Bell Curve*, discusses the "intractable" 15-point IQ gap between Black and White populations. Murray acknowledges the "Flynn Effect" but argues that the gap has not narrowed significantly since the early 20th century. He claims that while academic tests showed some narrowing in the 70s and 80s, pure IQ tests like the Stanford-Binet continue to show a one-standard deviation difference.