T he debate between realists and constructivists has polarized much environmental scholarship in recent years. Although social constructivist accounts have proven fruitful in making sense of a wide range of social phenomena, their more recent application to natural phenomena, and especially to environmental issues, has raised questions that prove discomforting for many environmental scholars and activists. The dilemma raised by constructivists is this: If nature, wilderness, ecology, and the environment are all socially constructed-ideas about the world rather than the world itself-what is it exactly that environmental protection efforts are fighting to defend and preserve? 1 This debate flared up among environmental scholars following the publication of William Cronon's (1995a) article "The Trouble With Wilderness" and the edited collection Uncommon Ground (Cronon, 1995b). Although not an entirely original argument (see, e.g., Callicott, 1991;Nelson, 1996), Cronon's cultural and historical deconstruction of the wilderness idea managed to make it into the popular press, with an excerpt published in The New York Times. In a series of articles and magazine editorials, conservation biologist Michael Soulé (1995), Earth First! cofounder Dave Foreman (1996/1997), biocentric deep ecologists George Sessions (1995a) and Paul Shepard (1995), and poet Gary Snyder (1996 responded by decrying Cronon and his postmodern deconstructionist allies as new enemies of environmentalism, responsible for what Soulé and Lease (1995) called a "social siege of nature" that ostensibly both parallels and supports the physical siege of nature by industrial society.