Well, given the higher rates of both abortion and crime among black Americans, there does seem to be some statistical merit to the idea.
I’m quite opposed to aborting anybody, but it does seem that the lower socio-economic groups seem to have more abortions.
I’m fully against all forms of abortion, but Steven Levitt does make an excellent case for the theory that abortion does ultimately lower violent crime rates. His analysis of data seemed spot on, yet in his defense, I really don’t think he was advocating it - just making a point about unintended consequences. I’ll be really curious how this new book treats the data.