Ned Block on The Bell Curve
If you have any interest in the topic of race and IQ and you haven't read this, you really ought to do so. Block shows the very basic error made by Murray and Herrnstein, in carrying over the heritability of IQ within a race to heritability across races. (As Block clearly demonstrates, there is no necessary connection between the two numbers whatsoever.) Along the way, he also shows that "These issues are pathetically misunderstood by Charles Murray.