There are good reasons not to confine the discussion to academic journals. In the latest issue of National Review, John McWhorter has a challenging and thought-provoking essay about the topic of race and IQ — specifically, about whether that topic should even be up for discussion in liberal-arts classrooms and in the media, as opposed to in scientific journals. He suggests not, as there is nothing to gain from discussing it. I read McWhorter’s essay with special interest because I have violated the norm he proposes. I have written about race and IQ on numerous occasions — and for a...