I think discussion about IQ, genetics and co are mostly meaningless for various reasons: the issue is extremely loaded politically, which means it is difficult

I think discussion about IQ, genetics and co are mostly meaningless for various reasons: the issue is extremely loaded politically, which means it is difficult to discuss about it with people who has a different opinion, and the science around it is inconclusive at best (the nature or even the reality of flynn effect is still debated, for example). This is not to say it is not interesting, but I would put it in the same camp as discussion around religion: it is possible to discuss about it, but almost impossible to do it in a reasonable manner with random people in the internet. That's why I refuse to discuss it as a matter of principle in most cases with people I don't know personally.