Scott M. Fitzpatrick, professor of archaeology and associate director for research and collections at the Museum of Natural and Cultural History at the University of Oregon, is the editor of Ancient Psychoactive Substances. Jon M. Erlandson is professor emeritus of anthropology and former executive director of the Museum of Natural and Cultural History at the University of Oregon. Kristina M. Gill is an archaeologist, archaeobotanist, and research scientist at the Museum of Natural and Cultural History at the University of Oregon. Erlandson and Gill are coeditors of An Archaeology of Abundance: Reevaluating the Marginality of California's Islands.