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.

Greg Duncan is Distinguished Professor of Education at the University of California, Irvine. He has published extensively on welfare and poverty, including (as co-author) Higher Ground: New Hope for the Working Poor and Their Children and (as co-editor) For Better and For Worse: Welfare Reform and the Well-Being of Children and Families.

Barbara Kellerman is the James McGregor Burns Lecturer in the Leadership at the Center for Public Leadership of the Kennedy School of Government at Harvard University and the author of Bad Leadership: What It Is, How It Happens, Why It Matters.

Angela Glover Blackwell is founder and CEO of PolicyLink, a national research institute in Oakland, Calif., that works for economic and social equity. She is a lawyer and well-known advocate on issues of poverty, race and the role of faith.