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.

Room in the Inn is a coalition of nearly 200 congregations in Nashville, Tennessee, that provide shelter and other services to the city’s homeless. It has become a model for similar programs around the South. Contact executive director Rachel Hester.

Greg Boyd is senior pastor of Woodland Hills Church in St. Paul, Minn., and author of The Myth of a Christian Nation: How the Quest for Political Power is Destroying the Church, in which he says American Christians should seek to build the kingdom of God instead of building political power.

Formed in November 2005, We Believe Ohio includes 100 racially and theologically diverse clergy interested in social justice.

Interfaith Impact of New York is a statewide coalition of congregations and individuals from mainline Protestant, Reform Jewish, Unitarian Universalist and other faith traditions that work for compassion and justice in New York state public policies.

Dan Wakefield is a veteran writer and Unitarian in Boston whose newest book is The Hijacking of Jesus: How the Religious Right Distorts Christianity and Promotes Prejudice and Hate (Nation Books, 2006). Read an excerpt in the April 24, 2006, issue of The Nation.