This sourcebook considers species extinction as the product of both natural selection and human activity; it then suggests ways to minimize the latter cause, and estimates the cost to human civilization of such efforts. Offers a chronology of events related to endangered species, biographical sketches of noted proponents of preservation, an overview of pertinent US legislation and litigation as well as international treaties, a directory of organizations, and annotated listings of print and nonprint resources. Annotation copyrighted by Book News, Inc., Portland, OR