Ezra Klein debunks the Charles Murray "Bell Curve" book. Murray is the guy who says that the key to intelligence is genetic, and that as a result intelligence is race-based and unchangeable. The article is a good explanation of both the rare positive reviews and the many and varied explations of why Murray's assertaions are not true, are not science, and why the "Bell Curve" and Charles Murray should be totally ignored. Go read it.
Thanks to Atrios who also provides a really good debunking of Murray's tome.