Bachelor in Philosophy/Liberal Arts, State University of New York, Purchase, 1973. Master of Arts in Philosophy, New School University, 1978. Doctor of Philosophy in Philosophy, New School University, 2000.
Proprietor Neglected Bulb Company, Berkeley, California, 1989—1998. Adjunct professor Manhattan Community College, New York City, 2000—2001, New School Adult Division, New York City, 2000—2002, Marymount Mahattan College, New York City, 2001—2002, New York City College of Technology, Brooklyn, since 2001.
Founder, newsletter editor Calochorus Society, Berkeley, California, 1989—1998. Representative California Native Plant Society, 1995—1998. Member of International Society for Environmental Ethics, American Society for Value Inquiry, American Philosophical Association.
Married Karin Ruth Stokkink, August 15, 1971 (divorced October 2000). Children: Kieran Timothy, Betsy Katrine.