Paul W.B. Atkins, PhD, is director of the Prosocial Institute, and senior research fellow with the Institute for Positive Psychology and Education at Australian Catholic University (ACU). His career has combined research and practice helping groups to thrive. His research has been published in the world's leading management and psychology journals. As a facilitator and coach, he has helped thousands of managers and leaders to improve their team leadership, conflict resolution, situational awareness, and well-being. David Sloan Wilson, PhD, is president of The Evolution Institute, and SUNY distinguished professor of biology and anthropology at Binghamton University. He applies evolutionary theory to all aspects of humanity, in addition to the biological world. His books include Darwin's Cathedral, Evolution for Everyone, The Neighborhood Project, and Does Altruism Exist? Steven C. Hayes, PhD, is Nevada Foundation Professor in the behavior analysis program in the department of psychology at the University of Nevada, Reno. His career has focused on analysis of the nature of human language and cognition, and its application to the understanding and alleviation of human suffering and promotion of human prosperity. Among other associations, Hayes has been president of the Association for Behavioral and Cognitive Therapies (ABCT), and the Association for Contextual Behavioral Science (ACBS). His work has received several awards, including the Lifetime Achievement Award from ABCT.