I'm not an IQ denialist but I am a skeptic -- can someone who is a true believer explain this to me?
IQ correlates with success. But to say this says anything deep about intelligence is a leap. It could just as well be that success correlates with IQ; that is, we've set society up in such a way that it is beneficial to be the type of person who would score well on an IQ test
High IQ is basically a measure of willingness to go along with the modern project, which is why countries without a high IQ culture fail in that respect. But it doesn't say anything about epistemology or biology