A commenter posted a link to this article, which I suppose is worth reading, but what struck me was this paragraph at the very top:

The left loathes the concept of IQ — especially the claim that it helps to determine socio-economic status, rather than vice versa — because of a near-religious attachment to the idea that man is a piece of clay that can be moulded into any shape by society

I don’t think this is true anymore. Not with respect to prole whites. The liberal elite has come to hate prole whites, and they would be quite ready to believe that proles whites, the people who voted for Donald Trump, are actually genetically inferior to themselves.

Nope, the reason the left currently loathes the concept of IQ is entirely related to the “gap” between blacks and whites. The left believes that racism is the most evil thing in the world, and that only the most evil of racists would believe that the “gap” is caused by genetics.