This volume documents the progress of Arne Naess’s ecophilosophy from its inception to the late 1990s. 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polemics with leading thinkers, drawn from sources as diverse as scholarly articles, correspondence, TV interviews and unpublished exchanges.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 sceptical and self-correcting aspects of Naess’s vision, which has deepened and broadened to include third-world and feminist perspectives. Contributors include Peder Anker, Andrwe Brennan, John Clark, William C. French, Val Plumwood, Peter Reed, Fons Elders, Karen Warren, Richard A. Watson, Ariel Salleh and Michael E. Zimmerman.