Ralph Metzner

Ralph Metzner is an American psychologist and philosopher who has written extensively on the topics of consciousness, spirituality, and the nature of reality. He is a professor emeritus at the California Institute of Integral Studies and has taught courses on topics such as 'The Psychology of Mysticism' and 'The Nature of Consciousness'. Metzner has also been involved in various spiritual and esoteric traditions, including Theosophy and Hermeticism. He is known for his work on the topic of the 'collective unconscious' and its relationship to human consciousness and the universe.