Charles T. Tart. Dr. Tart is Emeritus Professor of Psychology at the University of California, Davis, and is renowned for his research on consciousness and parapsychology. One of the founders of transpersonal psychology, he is the author of many books, including Altered States of Consciousness and Transpersonal Psychologies. His most recent book is The End of Materialism. We spoke of science and spirituality and the many lessons he’s learned over half a century of research and scholarship.