Jonathan H. Turner is Distinguished Professor of Sociology at the University of California, Riverside, and University Professor for the University of California. He is the author of thirty-eight influential books, which have been published in twelve different languages.

Richard Machalek is Professor of Sociology at the University of Wyoming. His work addresses the evolution of social behavior among both human and non-human species. His publications have appeared in venues such as Sociological Theory, the American Journal of Sociology, Advances in Group Processes, Rationality and Society, and Advances in Human Ecology.

Alexandra Maryanski is Professor of Sociology at the University of California, Riverside. She is the coauthor of four books outlining her approach to a more biological-based sociology, plus another edited book devoted to evolutionary analysis in the social sciences. She is also the author of many dozens of research articles and chapters using data on primates as a lens for understanding human nature and its affects on behavior, interaction, and social organization.