STEIN: So I talked to Hank Greely about that. He’s a bioethicist at Stanford.

HANK GREELY: “Move fast and break things” has not worked very well for Silicon Valley in health care. When you talk about reproduction, the things you are breaking are babies. And I think that makes it even more dangerous and even more sinister.

STEIN: And Greely, you know, he’s far from alone. I talked with a bunch of bioethicists who agree that renewed interest is making them very worried. And they argue that this movement is today’s version of eugenics, you know, that long-discredited pursuit of supposedly genetically superior people.