Shannon and Walter are two accomplished theologians with an extensive track record in bioethics. For those who want a comprehensive analysis of religious and ethical positions on the new genetics, this is the book. It provides an excellent compass for scholars and can serve as a course text.

Lisa Sowle Cahill, J. Donald Monan Professor of Theology, Boston College

The first task, in a complex democracy facing a complex moral issue such as the use of genetic medicine, is to learn to listen. It is precisely when we most deeply disagree about meaning and moral choices that we need to hear each justifying argument and be troubled by each troubling question. Shannon and Walter have consistently offered a differing, distinctive, and thoughtfully argued voice in Catholic bioethics, and their understanding of their tradition and its attention to social justice is an important contribution to the multivocal work of moral citizenship.

Laurie Zoloth, Northwestern University