[ThomPete]

Yes, of course, there are.

The correct reading is that there is biological difference both between the sexes and inside each of the sexes.

This is a reference to the identity politics you see especially in 2ndwave/3rd wave feminism which claims that almost everything is a social construct.

[tdg]

I don't get it.

He says there are IQ differences between people. Who are these "people" if not men and women? He either means men are smarter or he just randomly went on a tangent.

Let me ask you, when he says there are IQ differences between people, which groups of people do you think he means?

[ThomPete]

What is it you don't get?

He is referencing the people who claim there is no biological differences and that almost everything is social constructs.

If you want to understand what he is talking about here is an example

https://www.nytimes.com/roomfordebate/2015/06/16/how-fluid-i...

[bobdole1234]

He's referring to a group that is selected based on their intelligence. In that case, it doesn't really matter what the distribution of the larger population is, because you're only talking about a group that is selected for their favorable attributes.

For someone to say that people who are already in a career, that is, already selected for their ability, are less suited because of their sex is kind of absurd.

[ThomPete]

No he is referring to the claims by the left who claim that there is little biological difference and mostly social constructional. Read the whole thing and the whole sentence.

[alexandercrohde]

He's arguing "the left" would never say group A has a higher average IQ than group B, regardless of the groups.

That tidbit is a paranthetical in a sentence about the psychology of left vs right. His thrust is an illustration of how ideology and science are conflated.