[Author Adam] Cohen takes [Catholic] opposition for granted, never exploring the meaning or roots of natural law and why it drove the church to quash sterilization in states such as Louisiana and New Jersey. Rather than confront sterilization on moral or philosophical grounds, Cohen bases his opposition on scientific grounds: Carrie Buck had a sixth grade education, sterilization alone couldn’t eliminate “feeblemindedness,” Jews, it turns out, are pretty smart (they just didn’t know English when the eugenicists gave them IQ tests). It is convenient that eugenics makes for crappy science, but what if it had checked out?What if it turned out to be true that you could substantially improve humanity by forcibly sterilizing large groups of people? According to US Supreme Court precedent, it's totally constitutional for the government to forcibly sterilize you.
So if it's legal, and the science showed that it worked, would it be moral? Not according to natural law theory, but today the left rejects that -- and it does so on what it takes to be scientific grounds. Specifically, natural law theory looks for purpose in nature, and the current leading theories in biology reject that things evolve for reasons. It's all random. There is thus nothing that is "unnatural" in the sense that it could be said to violate some sort of "natural law" -- not blinding the eyes, nor deafening the ears.
If the Constitution and the law do not protect you, and the science is on the other side, should we simply accept the morality of such practices? The Church says no, but a religious moral law cannot be the foundation for any American laws under the current reading of the anti-establishment clause. What protection remains? Merely the fact that science hasn't quite worked out how to do it yet?