> Oh I've read it and am familiar with their argument

You do not seem to be familiar with the their conclusions and sentiments, no.

> The abortion argument is just a pathway to IQ/some people are genetically more predisposed to being dumb & violent, etc. It's just a step on the way there. I hardly think I have to spell out what's the next step on the road after that. Open white supremacists like Steve Sailer vocally support the abortion argument, for instance

Not even close.

> LEVITT: I actually think that our paper makes really clear why this has nothing to do with eugenics. ... what our data suggests is that women are pretty good at choosing when they can bring kids in the world, who they can provide good environments for, okay? The mechanism by which any effects on crime have to be happening here are the women making good choices. And that’s such a fundamental difference — between women making good choices and eugenics, which is about the state, say, or some other entity forcing choices upon people, almost couldn’t be more different.

> ...

> What did Donohue mean by “unwantedness”? He was referring to the expansive social-sciences literature which showed that children born to parents who didn’t truly want that child, or weren’t ready for that child, these children were more likely to have worse outcomes as they grew up — health and education outcomes. But also, these so-called “unwanted” kids would ultimately be more likely to engage in criminal behaviors.

> ...

> The mechanism was pretty simple: unwanted children were more likely than average to engage in crime as they got older; but an unwanted child who was never born would never have the opportunity to enter his criminal prime, 15 or 20 years later. Donohue and Levitt created a tidy syllogism: unwantedness leads to high crime; legalized abortion led to less unwantedness; therefore, abortion led to lower crime.

> DONOHUE: ... presumably the greatest thing that could happen in this domain is if you would eliminate unwanted pregnancies in the first place. But American policy has not been nearly as effective in achieving that goal.

> A country like the Netherlands, which has really tried to reduce unwanted pregnancies, has probably had the right approach in dealing with the issues that our research at least raised. So they have much, much lower rates of abortion even though abortion is completely legal in the Netherlands. But they want to stop the unwanted pregnancies on the front end, and I think almost everyone should be able to agree that that is the preferable way to focus policy if one can.

> ...

> LEVITT: On the other hand, I don’t think anyone who is sensible should use our hypothesis to change their mind about how they feel about legalized abortion. So it really isn’t very [abortion] policy-relevant. If you’re pro-life and you believe that the fetus is equivalent in moral value to a person, well then, the tradeoff is awful.

> ...

> LEVITT: So there are two policy domains for which this research is important. ... the second [policy domain] really does relate to the idea that if unwantedness is such a powerful influencer on people’s lives, then we should try to do things to make sure that children are wanted. You could at least begin to think about how you would create a world in which kids grow up more loved and more appreciated and with brighter futures. And you know, is that better early education? Is that, you know, permits for parents? Or training for parents? Or, you know, minimum incomes? Who knows what the answer really would be. But there’s a whole set of topics I think which are not even on the table.