The Louisville Coalition for the Homeless serves the homeless population of Louisville, Kentucky, by educating the community about homelessness, advocating for system changes and coordinating the community response. Natalie Harris is executive director.

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.

UNITY of Greater New Orleans is a nonprofit organization which coordinates over 60 organizations in order to provide housing and services to prevent, reduce and end homelessness.

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

Fred Plumer, a retired minister, is head of The Center for Progressive Christianity, a web-based network of progressive faith communities. It is based in Gig Harbor, Wash.

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

Peter Laarman of Los Angeles is executive director of Progressive Christians Uniting and an ordained United Church of Christ minister. He is editor of the just-published Getting on Message: Challenging the Christian Right from the Heart of the Gospel (Beacon Press, 2006) and knows a lot of other groups active on this subject.