... par-tial list reminds us of their complexity and scope: global warming, the rapidelimination of tropical rain forests and with them countless species of flora and fauna, the conversion of what little ... com-munities, and you leave the domain of cognition and reciprocationamong equals, to that of mere sentience, and then, into the domain of insentience and nonlife. As you do, you shed the stringency of your ... Foundations of the Land Ethic,” in InDefense of the Land Ethic, ed. J. Baird Callicott (Albany, N.Y.: SUNY Press, 1989), 93.4. David Hume, An Inquiry Concerning the Principles of Morals (New York: ...