Stem cell research, genetically modified crops, animals developed with personalized human organs for transplantation, and other previously inconceivable biotech applications could increase the quality of all human lives and maximize the health of the biosphere. But ironically, as the science becomes more precise and transparent, it also becomes more contentious. In Challenging Nature, Silver argues that although they seem to have little in common, Christian fundamentalists opposed to embryo research and New Age organic food devotees are both driven by a deeply rooted fear that biotechnology--in some guise--challenges the sovereignty of a higher or deeper transcendent authority. In the short term, Silver writes, Eastern spiritual traditions will give Asian countries a research advantage. But over the millennia, human nature may have the potential to remake Mother Nature in the image of an idealized world.