Paul W. Atkins, PhD, is director of Prosocial psychology and senior research fellow with the Institute for Positive Psychology and Education, ACU, Australia. 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, and 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: How Darwin's Theory Can Change the Way We Think About Our Lives, The Neighborhood Project, and Does Altruism Exist? Steven C. Hayes, PhD, is Nevada Foundation Professor and director of clinical training at the department of psychology at the University of Nevada. 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 Therapy, and the Association for Contextual Behavioral Science. His work has received several awards, including the Impact of Scienceon Application Award from the Society for the Advancement of Behavior Analysis.