I just skimmed the chapter again to refresh my memory. It has a clear 'THOSE people [lower income, lower IQ] having abortions reduced the crime rate' angle. I'm sure they may have said something different after the fact, to not appear pro-eugenics (they likely didn't know how popular their book would be when they were writing it!). I invite anyone who disagrees to simply read the source material themselves.

Anyways, seeing as not only do social scientists widely disagree with their hypothesis, but other researchers found flaws in their data sets that Leavitt & Donohue were forced to acknowledge & correct for- it seems irrelevant?