As a former chairman of George W. Bush’s President’s Council on Bioethics, Leon Kass is well acquainted with controversy, and with the treacherous terrain at the nexus of science and politics. The council, tasked with advising the president on such hot-button issues as stem cell research and cloning, has sometimes been dismissed as a vehicle for the right wing of the Republican Party. But although some of his views comport with those of hard-liners, Kass, a physician with a Ph.D. in biochemistry, is hard to pigeonhole. “I do not come from a school of thought, nor do I have an ideology,” he says.
An old-fashioned moralist, he holds some views that are remarkably unfashionable—even premodern. He still employs the term bastard to describe the children of unwed parents, and he has written despairingly about the loss of “female modesty” in our culture. At the same time, he has misgivings about ...