The edition I have is so old it doesn't even have an ISBN barcode :) so it is pre Bell Curve and I haven't read the additions expressly about that controversy. But the danger is far older than that book, and this is a well-reasoned warning about and response to the abuse of standardized tests to categorize and classify people far beyond what the tests actually measure. It should be obvious stuff, really, in an ideal rational world; but as we humans are it has always been, and still is, tempting both to take shortcuts in trying to understand the world, and to seek out theories that assure us that we are superior to someone else in some way.

Gould may slip from pure scientific reporting into advocacy in places, but I think that's entirely appropriate; this isn't a peer-reviewed scientific paper, and what he is advocating for is rationality and truth and compassion. So yeah...