Ralph Metzner, Ph.D. is a recognized pioneer in studies of consciousness and its transformations. He is a psychotherapist and Professor Emeritus at the California Institute of Integral Studies, where he was also the Academic Dean for ten years in the 1980s. He collaborated with Timothy Leary and Richard Alpert in the studies of psychedelic drugs at Harvard in the 1960s, and co-authored The Psychedelic Experience. His books include Maps of Consciousness, The Well of Remembrance, The Unfolding Self and Green Psychology; as well as two edited collections on the science and phenomenology of ayahuasca and the psilocybin mushrooms. He is founder and president of the Green Earth Foundation, an ecological educational organization, and teaches a training program in Alchemical Divination.