Sung Hee Kim is an associate professor of psychology and a member of the social psychology core group at the University of Kentucky in Lexington. Her research interests include conflict, group processes and vengeance.

Craig Anderson is a psychology professor at Iowa State University in Ames and co-author of “Violent Evil and the General Aggression Model” in The Social Psychology of Good and Evil. 

Arlin J. Benjamin Jr. is a social psychologist at University of Arkansas-Fort Smith. In his research, he applies social psychological theories of aggression to help understand how torture and genocide happen. He is the author of “Human aggression and violence: Understanding torture from a psychological perspective,” published in National Social Science Journal in 2006.

Jack Glaser is a social psychologist and assistant professor of public policy at the Goldman School of Public Policy at the University of California-Berkeley. He studies the social psychology of hate crimes and intergroup violence.

Elliot Aronson is emeritus professor of psychology at University of California, Santa Cruz, and author of Nobody Left to Hate: Teaching Compassion After Columbine. 

Adam Cohen is an assistant professor of social psychology at Arizona State University in Tempe. His interests include moral judgment.

Keith Akers is a Christian vegetarian and environmental activist who lives in Englewood, Colo. He operates the Compassionate Spirit website, which includes articles and commentary on animal welfare from a Christian perspective.

Andrew Isenberg is a history professor at Temple University in Philadelphia. He is an expert on the history of American environmentalism, especially in the American West. He contributed a chapter on the moral ecology of wildlife to the book Representing Animals.

Alan Goldberg is a professor of environmental health sciences and director of the Johns Hopkins Center for Alternatives to Animal Testing. The center works with scientists to find new methods to replace laboratory animals in experiments, reduce the number of animals tested and refine necessary tests to eliminate pain and distress. It is based in Baltimore.