Melissa Farley is a clinical and research psychologist and directs the San Francisco-based Prostitution Research and Education project, which works to abolish prostitution and help prostitutes. She edited Prostitution, Trafficking and Traumatic Stress.

Kay Buck is executive director of the Coalition to Abolish Slavery & Trafficking, a nonprofit that seeks to serve victims of trafficking. It is based in Los Angeles.

The Rev. Jack B. Rogers is a lifelong evangelical and former leader of the Presbyterian Church (USA). In March 2006, he published a book, Jesus, the Bible and Homosexuality: Explode the Myths, Heal the Church, describing how he has changed his position from opposing gay ordination to supporting it.

Richard J. Mouw is a well-known writer and commentator on evangelical Christianity and the president of the Fuller Theological Seminary in Pasadena, Calif., a leading evangelical institution. Contact Mouw through Fred Messick, Fuller’s associate vice president for public affairs.

March 5, 2006, NPR interview with Kevin Appleby, director of migration and refugee policy for the United States Conference of Catholic Bishops, in which he describes immigration policy as a humanitarian and moral issue and said, “In the face of the stranger we see the face of Christ.”

April 2, 2006, Washington Post article on former Los Angeles Cardinal Roger Mahony’s fight for immigration rights.

April 25, 2013, Sacramento Bee article about California bishops’ support for a federal overhaul of immigration.

Alexander W. Astin is professor of Higher Education Emeritus at the University of California. He is a co-principal investigator of “Spirituality in Higher Education: A National Study of College Students’ Search for Meaning and Purpose,” an ongoing study by the Higher Education Research Institute at the University of California at Los Angeles.

Tim LaHaye, co-author of Left Behind, the apocalyptic novel series, also wrote Faith of Our Founding Fathers: A Comprehensive Study of America’s Christian Foundations.