Emil O W Kirkegaard

Care to justify why exactly this is necessary research? Let's take the common sense view that there are racial differences in intelligence: who cares? What changes about how society ought to operate?

So? We can say affirmative action is a bullshit policy without any reference to racial differences in IQ. Individuals should be judged according to their ability and with no reference to race, we already know that.

I believe we can say without any evidence of racial inequality in IQ that affirmative action is unjustified.

I got that part, but some don't think so, and their argument for it is based on current and past mistreatment. Current mistreatment is their proposed cause of the intelligence gaps, so you have to address those some way or another.

TL;DR for effective argumentation against affirmative action, you need to establish genetic causation to rule out their pet hypothesis about current mistreatment which affirmative action is supposed to compensate for.

The correct reason for affirmative action being bs is because we ought to be selecting individuals on the basis of competence - and in that case race is completely irrelevant