Arne Naess is a widely celebrated Norwegian philosopher and activist whose long career includes a prestigious professorship in the University of Oslo's philosophy department, continuing activism in social and ecological issues, and major contributions to the development of the Deep Ecology Movement. His many books include Ecology, Community, and Lifestyle, Life's Philosophy , and Four Modern Philosophers . He is currently Professor Emeritus at the University of Oslo and a Fellow of their Center for Development and Environment.

Bill Devall is emeritus professor of sociology at Humboldt State University, Arcata, California. He is the author of numerous books on deep ecology, including Deep Ecology: Living as if Nature Mattered and Simple in Means, Rich in Ends: Practicing Deep Ecology. He is also the editor–in–chief of Clearcut: The Tragedy of Industrial Forestry.

Alan Drengson is emeritus professor of philosophy and adjunct professor of environmental studies at the University of Victoria in Canada. He is the founding editor of The Trumpeter: Journal of Ecosophy and Ecoforestry, as well as coeditor of three anthologies, The Philosophy of Society, The Deep Ecology Movement, and Ecoforestry. Most recently, he oversaw the completion of the Selected Works of Arne Naess, a ten–volume collection of Naess's writings.