Omer C. Stewart received the Ph.D. from the University of California, Berkeley, as a student of A. L. Kroeber, Robert H. Lowie, and Carl Sauer. No non-Indian knew the Native American Church and its history better than he.
Henry T. Lewis was Professor of Anthropology at the University of Alberta, Edmonton, and author of Patterns of Burning in California: Ecology and Ethnohistory.
M. Kat Anderson is the national ethnoecologist of the Natural Resources Conservation Service, U.S. Department of Agriculture, and author of Tending the Wild: Native American Knowledge and the Management of California's Natural Resources.