Gary Comstock

Bovine growth hormone is a protein that occurs naturally in cattle. A chain of 190 amino acids, bGH is produced by the pituitary gland and helps to regulate a cow’s lactational cycle; generally speaking and up to a certain point, the more bGH a cow has, the more milk she gives. Using the techniques of genetic engineering, researchers at Monsanto Company have isolated the gene that produces the protein and devised low-cost techniques to manufacture it. Bacteria are placed into fermentation chambers where they multiply rapidly; lab technicians then extract and purify the final product, which is identical to the naturally occurring protein in 189 of the 190 amino acids; and the product is then injected into cows.

The first section of Life Science Ethics introduces students to essential background concepts in moral theory -- ethics, the relationship of religion to ethics, how to assess ethical arguments, and a method used to reason about ethical theories. The next section demonstrates the relevance of ethical reasoning to six topics: -- The relative moral standing of ecosystems, nonhuman animals, and future human generations -- The moral justifiability of genetic engineering as a whole and the patenting of life forms in particular -- Our duty to aid the hungry -- Our obligation to animals used to produce fiber, food, and knowledge -- Public policies to adjudicate conflicting rights claims among urban consumers, environmentalists, and farmers over the use of water and land -- The virtues traditionally associated with family farms Part three provides a dozen case studies and study questions to raise relevant ethical issues and draw readers into concrete discussions of complex moral questions.

Environmental ethics consists of a set of competing theories about whether human actions and attitudes to nature are morally right or wrong. Ecocentrists are holists whose theory locates the primary site of value in biological communities or ecosystems and who tend to regard actions interfering with the progress of an ecosystem toward its mature equilibrium state as prima facie wrong. I suggest that this form of ecocentrism may be built on a questionable scientific foundation, organismic ecology, and that a better scientific foundation for environmental ethics may be found in individualistic neo-Darwinian population biology. However, the latter approach probably requires a corresponding shift away from ethical holism and toward approaches locating value primarily in individuals. I call such environmental ethicists ‘extensionists’ and briefly outline an extensionist environmental ethic.

This second edition of Life Science Ethics includes four essays not found in the first edition: Richard Haynes on “Animals in Research” Stephen M. Gardiner on “Climate Change” Christopher Kelty on “Nanotechnology” Gary Comstock on “Genetically Modified Foods” and a revised and expanded version of the chapter on “Farms” in which Stephen Carpenter joins Charles Taliaferro as author. In addition, Part III has been thoroughly revised with the goal of focusing attention on salient examples. Three new case studies have been added: Robert Streiffer and Sara Gavrell Ortiz on “Enviropigs” Donald F. Boesch, et al. on “Coastal Dead Zones” Deb Bennett-Woods on “Nanotechnology and Human Enhancement” The first edition was praised for providing instructors with a stimulating text that will help students hone their critical thinking skills. That text is here enhanced with treatments of critical new issues, including global warming, nanotechnology, and the possibility that bioengineering may be able to change human nature. The new edition includes classroom discussion questions for use in provoking and guiding in-class discussions. Part I introduces ethics, the relationship of religion to ethics, how we assess ethical arguments, and a method ethicists use to reason about ethical theories. Part II demonstrates the relevance of ethical reasoning to the environment, land, farms, food, biotechnology, genetically modified foods, animals in agriculture and research, climate change, and nanotechnology. Part III presents case studies for the topics found in Part II. Two appendices include exercises to help students learn systematic ways of thinking through ethical dilemmas and notes for instructors using the book as a text.