Professor in the department of religion at Bucknell University, John Grimís fields of interest are indigenous religions, religion and ecology and ritual studies. As an historian of religions, John undertakes annual field studies in American Indian lifeways among the Apsaalooke/Crow peoples of Montana and the Swy-ahl-puh/Salish peoples of the Columbia River Plateau in eastern Washington.
Raised in the Missouri drift prairies of North Dakota, Grim studied with Thomas Berry at Fordham University. There, he completed a doctoral dissertation on Anishinaabe/Ojibway healing practitioners, The Shaman: Patterns of Religious Healing Among the Ojibway Indians. Grim is the editor of the volume Indigenous Traditions and Ecology: The Inter Being of Cosmology and Community. With his wife, Mary Evelyn Tucker, he has co-edited Worldviews and Ecology, a book discussing perspectives on the environmental crisis from world religions and contemporary philosophy.
Grim co-organized, with Mary Evelyn Tucker, a series of 13 conferences on "Religions of the World and Ecology," held at Harvard University's Center for the Study of World Religions from 1996 to 1998. He is president of the American Teilhard Association, which continues the investigations of the French Jesuit paleontologist Pierre Teilhard de Chardin regarding religion, science and evolution.