I've never read the "Bell Curve", and I'm not a huge fan of Charles Murray's work in general, but, from the first line in Wikpedia: "The Bell Curve: Intelligen

I've never read the "Bell Curve", and I'm not a huge fan of Charles Murray's work in general, but, from the first line in Wikpedia: "The Bell Curve: Intelligence and Class Structure in American Life is a 1994 book by psychologist Richard J. Herrnstein and political scientist Charles Murray, in which the authors argue that human intelligence is substantially influenced by both inherited and environmental factors." That statement completely contradicts what your claim about the book, and now I am disinclined to trust you.. Later on another statement also completely contradicts what you are saying: "According to Herrnstein and Murray, the high heritability of IQ within races does not necessarily mean that the cause of differences between races is genetic. On the other hand, they discuss lines of evidence that have been used to support the thesis that the black-white gap is at least partly genetic, such as Spearman's hypothesis. They also discuss possible environmental explanations of the gap, such as the observed generational increases in IQ, for which they coin the term Flynn effect"