Karen Dudley is the founder and senior pastor of Dallas International Street Church, a nondenominational church of homeless people in Dallas.

Susan Grettenberger is social work program director at Central Michigan University in Mount Pleasant, Mich. She has done research for the Aspen Institute on the involvement of religious groups in providing social services. She also has done research for the for The Roundtable on Religion & Social Welfare Policy comparing secular and faith-based providers of […]

Diane Nilan of Naperville, Ill., is a former shelter director who founded the nonprofit group Hear Us, to allow the voices of homeless children and youth to be heard. In 2005, Nilan sold her home and set off across the country to interview more than 70 homeless children and teenagers in 16 states, mostly in […]

Herbert Kelman is Richard Clarke Cabot Professor of Social Ethics, Emeritus, in the psychology department at Harvard University in Cambridge, Mass., and co-author of Crimes of Obedience: Toward a Social Psychology of Authority and Responsibility.

Arthur G. Miller is a psychology professor at Miami University in Oxford, Ohio, and editor of The Social Psychology of Good and Evil.

Martha K. Huggins is Charles A. and Leo M. Favrot Professor of Human Relations at Tulane University in New Orleans and co-author of Violence Workers: Police Torturers and Murderers Reconstruct Brazilian Atrocities.

Danny L. Balfour is a professor and past director of the School of Public and Nonprofit Administration at Grand Valley State University in Grand Rapids, Mich. He is co-author of Unmasking Administrative Evil and of “Abu Ghraib, Administrative Evil, and Moral Inversion: The Value of ‘Putting Cruelty First’ ” in the September/October 2006 issue of Public Administration Review.

Russell Powell is associate professor of law at Seattle University. His expertise includes comparative religious jurisprudence, with particular interests in Catholic social thought and Islamic legal theory.

Samuel L. Gaertner is a psychology professor at the University of Delaware in Newark. He is a social psychologist and co-author of the chapter “Contemporary Racial Bias: When Good People Do Bad Things” in The Social Psychology of Good and Evil.