Professor Raghubir Singh Pirta, a psychologist with special interest in animal behaviour and ecology, teaches at the Himachal Pradesh University, Shimla. He has been associated with the pioneer environmental movements in the Himalayas, the Chipko Movement and the Save Himalaya Movement. The Gandhian social workers engaged in these movements infused in Dr. Pirta a deep sense of humanistic approach. But his theoretical insights refined in several brief sojourns to the Center for Ecological Sciences, I.I.Sc. Bangalore. Dr. Pirta began his studies on the naturalistic behaviour of monkeys in the nineteen seventies, and later expanded it to sheep and goats. During the course of these researches he had first hand encounters with the grassroots social issues involving man and nature, which is exemplified in his recent book Ecology and Human Well-being: Nature and Society in Himachal Pradesh (Shipra Publications).