Peter Dobkin Hall is a lecturer in public policy and a senior research fellow at the Hauser Center for Nonprofit Organizations in the Kennedy School of Government at Harvard University. He does research on social welfare policy and civic engagement and has held a teaching appointment in the Divinity School.

Nancy Ammerman is professor of sociology at Boston University and a leading expert on congregational dynamics, especially in mainline Protestantism. She is the author of Sacred Stories, Spiritual Tribes: Finding Religion in Everyday Life and Pillars of Faith: American Congregations and Their Partners. She is also an expert on religious movements and has written about the rise of fundamentalism.

Marvin Olasky is editor of World magazine, based in Asheville, N.C. He is credited with coining the phrase “compassionate conservatism” and has been a proponent of the government’s faith-based initiatives. He is the author of Renewing American Compassion: How Compassion for the Needy Can Turn Ordinary Citizens Into Heroes (The Free Press, 1996).

Noel Castellanos is institute director of the Chicago-based Christian Community Development Association, which works to reclaim and restore under-resourced communities, and he was appointed to serve on the president’s council for Faith and Neighborhood Partnerships.

The United States Conference of Catholic Bishops supports the government’s faith-based initiatives. Read a 2005 statement posted on the website.

Rebecca Sager is an assistant professor of sociology at Loyola Marymount University in Los Angeles. She wrote Faith, Politics, and Power: The Politics of Faith-Based Initiatives (Oxford, 2010).

John DiIulio Jr. is a professor of politics, religion and civil society at the University of Pennsylvania and was the first director of the White House Office of Faith-Based and Community Initiatives. A frequent speaker and writer on faith-based social services, he is co-editor of What’s God Got to Do With the American Experiment? (Brookings, 2000).

Phillip Johnson is a retired professor of law at the University of California, Berkeley. After converting to Christianity, Johnson wrote two books on evolution and naturalistic philosophy for the general reader, one of which is Darwin on Trial, which is largely credited as founding the idea of intelligent design.

Patricia Telesco is the co-author of Sacred Beat: From the Heart of the Drum Circle. She has been participating in drum circles for many years and lives in Amhearst, N.Y. Contact via Bonni Hamilton, director of publicity for Red Wheel/Weiser.