Deep Ecology explores the philosophical, psychological, and sociological roots of today's environmental movement, examines the human-centered assumptions behind most approaches to nature, explores the possibilities of an expanded human consciousness, and offers specific direct action suggestions for individuals to practice. Widely read in it first printing, Deep Ecology has established itself as one of the most significant books on environmental thought to appear in this decade. AUTHOR: Bill Devall has studied the social organization, politics, psychology and philosophy of the environmental movement for fifteen years. He teaches at Humbolt State University in California and is active in many environmental groups including Earth First! and the Sierra Club. George Sessions teaches philosophy at Sierra College California. He was appointed to the Mountaineering Committee of the the Sierra Club in 1962, has served as a philosophy consultant to the National Endowment for the Humanities, and is editor of the International Ecophilosophy Newsletter.