Kennard Lipman, PhD, studied at the University of Chicago and at the University of California, Berkeley, completing his doctorate under Dr. H. V. Guenther. He received teachings from masters in all four schools of Tibetan Buddhism, his principal teacher being Namkhai Norbu Rinpoche. Chögyal Namkhai Norbu, born in Tibet in 1938, is one of the primary living masters of Dzogchen.
based on an examination of forty-nine of ONeills plays and a substantial number of scholarly works as well --Theatre Research International