As a professor of religion John taught courses in Native American and indigenous religions, religion, and ecology, ritual, and mysticism in the world’s religions. He is currently a visiting scholar at the Institution of Social and Policy Studies, Yale University, and president of the American Teilhard Association. His published works include: The Shaman: Patterns of Religious Healing Among the Ojibway Indians (University of Oklahoma Press, 1983) and, with Mary Evelyn Tucker, a co-edited volume entitled Worldviews and Ecology (Orbis, 1994, 5th printing 2000). Find out more about John on his website.