This article doesn’t seem to offer any evidence of anything. It seems to concede there are population level IQ differences between races. Just argues that this is unlikely to be due to genetics. Though concedes genetics causes IQ variation within any population. Thus she thinks within a population it can be genetic. Between populations it’s environmental. I’m not sure this makes sense to be but in any case we should work out why and what we can do about it.

IMO low IQ is a disability. Being born with the gift of a good brain capable of developing a high IQ is very under appreciated, surprisingly by many in this community. It should be understood better and we should have more sympathy for it. If you’re below 90 you’ll likely have a really rough go of life.