Any given Sunday morning, a bioethicist somewhere in America suits up for a TV appearance on the hot issue of the day or stands by a hospital bed to consult on a wrenching dilemma. Should doctors prolong the life of a baby born without a brain? Should they be allowed to help the terminally ill kill themselves by prescribing a lethal drug dose? Should there be limits on embryonic stem cell research? But who are these people opining on what we should do?