Peter H. Kahn, Jr., is Professor in the Department of Psychology and Director of the Human Interaction with Nature and Technological Systems Laboratory at the University of Washington. Kahn and Hasbach are coeditors of Ecopsychology: Science, Totems, and the Technological Species (MIT Press, 2012).

Stephen R. Kellert was Tweedy Ordway Professor Emeritus of Social Ecology at Yale University's School of Forestry and Environmental Studies. He was the author of a number of books, including Building for Life: Designing and Understanding the Human-Nature Connection, and the coeditor of Children and Nature: Psychological, Sociocultural, and Evolutionary Foundations (MIT Press).