Book excerpt: Students of conservation encounter some of the most complex issues on our planet. The resolution of existing problems become more complex when humans create further stresses on the natural balance. Moulton and Sanderson brought the challenging issues in wildlife conservation into greater clarity in Wildlife Issues in a Changing World. The Second Edition of this definitive reference focuses more closely on the causes of wildlife issues. The examination of Jared Diamond's "Evil Quartet" (the four principal causes of extinction) provides a framework for categorizing and resolving these issues. The authors encourage the use of the scientific method basis for resolution - especially where environmental laws have failed. The three new chapters provide further counterpoints to preconceived notions. A two-part history of wildlife in the U.S. shows how wildlife had already been decimated by the year 1900. "Can Humans Manage Wildlife?" questions efforts to revive endangered species, acts which may inadvertently jeopardize the survival of other life. Viewing the natural order from prehistoric times to the present, Wildlife Issues in a Changing World, Second Edition gives students and instructors an all-encompassing introduction to past relations between humans and nature; explorations of current threats to species and their habitats; and recent "novel solutions," where humanity and industry have made adjustments to protect the natural order. Professionals will also find invaluable reminders of the importance of their work - the continuation and endurance of wildlife everywhere on Earth.