The science of stem cells: some implications for law and policy.

There are few areas of modern biomedical research that have aroused as much controversy as stem cells. Scientists, physicians, patients and patient advocacy groups tend to emphasize the potential therapeutic benefits. Others argue that the potential benefits of stem cells have been exaggerated. Entrepreneurs, and research scientists — who are sometimes one and the same — envision vast medical and financial profits from stem cell therapy. Religious leaders pronounce judgments based strictly on faith and their understanding of when life begins. Those in positions of political power are eager to remain in power and seek a position wherein the fewest number of people are offended by a given policy choice.