Frans B. M. de Waal was Charles Howard Candler Professor Emeritus of Psychology at Emory University and former director of the Living Links Center for the Advanced Study of Ape and Human Evolution at the Emory National Primate Research Center. Robin Dunbar is Professor of Evolutionary Anthropology and Director of the Institute of Cognitive & Evolutionary Anthropology at the University of Oxford. William C. McGrew is Professor of Anthropology and Zoology at Miami University, Ohio. Craig Stanford is Professor of Biological Sciences and Anthropology at the University of Southern California. Karen B. Strier is Professor of Anthropology at the University of Wisconsin-Madison. Richard W. Wrangham is Ruth B. Moore Professor of Biological Anthropology in the Department of Human Evolutionary Biology at Harvard University.