David Ulansey is Professor Emeritus of Philosophy and Religion (Philosophy, Cosmology, and Consciousness Program) at the California Institute of Integral Studies in San Francisco (CIIS). He is a scholar of the history of religions, comparative religion, and cultural history (Ph.D., Princeton Univ.), and before teaching at CIIS he was on the faculties of the University of California at Berkeley, Boston University, Barnard College (Columbia University), the University of Vermont, Princeton University, and Pacifica Graduate Institute. His specialty is the religions of the ancient Mediterranean world, especially the ancient Mystery religions, Gnosticism, ancient cosmology, and early Christianity. He has also taught courses in a variety of more speculative areas such as the evolution of consciousness, archetypal psychology, alchemical symbolism, the metaphysics of cyberspace, and applied deep ecology, and has been a frequent lecturer at the San Francisco C.G. Jung Institute.