The volume documents, and makes an original contribution to, an astonishing period in twentieth-century philosophy—the progress of Arne Naess's ecophilosophy from its inception to the present. It includes Naess's most crucial polemics with leading thinkers, drawn from sources as diverse as scholarly articles, correspondence, TV interviews and unpublished exchanges. The book testifies to the skeptical and self-correcting aspects of Naess's vision, which has deepened and broadened to include third world and feminist perspectives. Philosophical Dialogues is an essential addition to the literature on environmental philosophy. For fans and devotees of deep ecology, the book is essential, with its copious collection of relevant articles and Naess's classic but often evasive responses. ( Environmental Values ) These debates are thought-provoking, on occasion entertaining, and illustrate something of the development of Naess' thinking about ideas such as unity and self-realization. ( Environmental Ethics ) Nina Witoszek is assistant professor at the European University in Florence, and at the Center for Development and the Environment, Oslo University. She is the author of many books, including Nature Mythologies: From the Eddas to Ecophilosophy (Blackwell) and the editor of Rethinking Deep Ecology and Culture and Environment: Interdisciplinary Approaches . Andrew Brennan is professor of philosophy and head of the philosophy department at the University of Western Australia. He is the author of Conditions of Identity (Oxford) and Environmental Philosophies (Routledge, forthcoming), and the editor of The Ethics of the Environment .