Dan, I agree.

Steve seems to believe that it has been scientifically proven that differences in average IQ between population groups cannot possibly be genetic, while CAS is asserting a more modest claim that it's a grave scientific mistake to assume that measured IQ differences are primarily due to genetic factors given the well known environmental factors.

**So both are quite critical of any elements of society which "equate IQ differences with genetic differences" (between population groups) in your words.**

It's hard to see any politically relevant differences between Steve and CAS. Neither of the two seems any more racist (or anti-racist) than the other. There might be some quibbling over scientific details, but not politically.

Seems like a tempest in a tea pot. We can pick on details of some phrasing if we enjoy that sort of thing, but the gist of both of their positions seems highly compatible.

(My own quibble: in Steve's excerpts CAS sometimes refers to the facet of cognition which IQ aims to measure correctly as "general intelligence", but is sloppy in just calling it "intelligence" at other times. "General intelligence" is a scientifically defined term, and IQ tests are scientifically accepted as a valid (though not perfect) measure of it. "Intelligence" however is an English word with no scientific meaning, any more than "smart" or "clever" and which in common language may or may not refer to aspects of cognition beyond general intelligence. So CAS should have been more consistent in terminology to avoid that confusion. Nevertheless, from the context, this appears to just be undisciplined writing, as CAS does correctly reference "general intelligence" when speaking carefully).