Sean M. Kelly, Ph.D., is Professor in the Philosophy, Cosmology, and Consciousness Program at the California Institute of Integral Studies (CIIS) in San Francisco. He has published numerous articles on Jung, Hegel, transpersonal psychology, and the new science and is the author of Individuation and the Absolute: Hegel, Jung, and the Path toward Wholeness (Paulist Press, 1993). Sean is an editor (with Donald Rothberg) of Ken Wilber in Dialogue: Conversations with Leading Transpersonal Thinkers (Quest, 1998) and a translator (with Roger Lapointe) of the French thinker Edgar Morin's book Homeland Earth: A Manifesto for the New Millennium (Hampton Press, 1999). Along with his academic work, Sean has trained intensively in the Chinese internal arts (taiji, bagua, and xingyi) and has been teaching taiji since 1990.

Rick Doblin, Ph.D., is the founder and executive director of the Multidisciplinary Association for Psychedelic Studies (MAPS). He received his doctorate in Public Policy from Harvard's Kennedy School of Government, where he wrote his dissertation on the regulation of the medical uses of psychedelics and marijuana and his Master's thesis on a survey of oncologists about smoked marijuana vs. the oral THC pill in nausea control for cancer patients. His undergraduate thesis at New College of Florida was a 25-year follow-up to the classic Good Friday Experiment, which evaluated the potential of psychedelic drugs to catalyze religious experiences. He also conducted a thirty-four year follow-up study to Timothy Leary's Concord Prison Experiment. Rick studied with Dr. Stanislav Grof and was among the first to be certified as a Holotropic Breathwork practitioner. His professional goal is to help develop legal contexts for the beneficial uses of psychedelics and marijuana, primarily as prescription medicines but also for personal growth for otherwise healthy people, and eventually to become a legally licensed psychedelic therapist. He founded MAPS in 1986, and currently resides in Boston with his wife, dog, and empty rooms from three children, one of whom is in college and two have graduated.