IQ is a very different thing from literacy (or generally any skills one learns). I think IQ is not relevant to this discussion. It's basically impossible to im

IQ is a very different thing from literacy (or generally any skills one learns). I think IQ is not relevant to this discussion. It's basically impossible to improve an adult's g-factor, for example. For children, things like nutrition and hygiene (e.g. no parasites) play a big role. But the kinds of things a human learns or tools they use doesn't significantly affect G-factor.