"But the more significant error is to assume that because individual genetic inheritance plays a part in ability to perform in IQ tests, so it must be at the level of the population group and this is wrong.”
https://morningstaronline.co.uk/article/b/a-journey-into-the-divisive-science-of-race
It's a weird way of writing that we have evidence that intelligence is genetic from data gathered from small groups, but we can't apply that to larger groups because it's wrong to do so. The rest of it is basically that dumb people are dumb because they have less money. It's the same leftist arguments.