Roger Walsh MD., Ph.D. DHL is professor of psychiatry, philosophy, & anthropology at the University of California. He researches contemplative practices, capacities such as love and wisdom, and our contemporary global challenges. His books include Essential Spirituality and The World of Shamanism, and his work has received over twenty national and international awards. He was formerly a circus acrobat, world record high diver, and unsuccessful standup comedian. See www.drrogerwalsh.com