Leon R. Kass, M.D. is a Professor in the Committee on Social Thought at the University of Chicago and Roger and Susan Hertog Fellow at the American Enterprise Institute. Among his books are <i>Toward a More Natural Science: Biology and Human Affairs</i>; <i>The Hungry Soul</i>; <i>The Ethics of Human Cloning</i> (with James Q. Wilson); and <i>Wing to Wing, Oar to Oar: Readings on Courting and Marrying</i> (with Amy A. Kass). In 2001, President Bush appointed Dr. Kass to chair the new President's Council on Bioethics. 
paperback, by Leon R. Kass — At the onset of Life, Liberty and the Defense of Dignity, Leon Kass gives us a status report on where we stand today: "Human nature itself lies on the operating table, ready for alteration, for eugenic and psychic 'enhancement,' for wholesale redesign. In leading laboratories, academic and industrial, new creators are confidently amassing their powers and quietly honing their skills.[...]
