Religious Action for Affordable Housing in Ann Arbor, Mich., works to increase the amount of affordable housing in a variety of ways. It has raised hundreds of thousands of dollars for the Avalon Housing project.

Bishop Harold Calvin Ray is pastor of Redemptive Life Fellowship in West Palm Beach, Fla. Its Redemptive Life Urban Initiatives Corp. has built affordable housing.

Gerald McKenny is a professor of Christian ethics and moral theology at the University of Notre Dame. He studies and writes about the ethics of biotechnology and the philosophy of medicine.

Dixon Sutherland is the Stetson University professor of religion and ethics and has also served as director of the Christian Ethics Institute.

Daniel Dombrowski is a professor of philosophy at Seattle University. He is the co-author of A Brief, Liberal, Catholic Defense of Abortion (University of Illinois Press, 2006).

Anne Hendershott is a professor of psychology, sociology and social work at Franciscan University of Steubenville in Ohio. She is the author of The Politics of Abortion (Encounter Books, 2006).

Read the Catholic Encyclopedia entry on Judas.

See the National Geographic Society website on the gospel of Judas.

Read a Dec. 7, 2010, New York Times blog post on marriage and the culture war.