Ralph Metzner, Ph.D
. has a doctorate in clinical psychology from Harvard University and has been involved in the study of transformations of consciousness ever since, as a graduate student, he worked with Timothy Leary and Richard Alpert (later Ram Dass) on the Harvard Psilocybin Projects. During the 1970s, Ralph spent 10 years in the intensive study and practice of Agni Yoga, a meditative system of working with light-fire life-energies. He is a Professor Emeritus at at the California Institute of Integral Studies and maintains a part-time psychotherapy practice. His books include The Well of Remembrance
, The Unfolding Self
, Green Psychology
, Maps of Consciousness
(one of the earliest attempts at a comparative cartography of consciousness), Know Your Type
(a comparative survey of personality typologies ancient and modern) and two edited collections on the science and the phenomenology of Ayahuasca and Teonanácatl.