Christopher Bader is a professor of sociology at Chapman University. He serves as associate director of the Association of Religion Data Archives and was principal investigator of the first two waves of the Baylor Religion Survey.

Darby Kathleen Ray is an associate professor of religious studies and director of the Millsaps Faith and Work Initiative at Millsaps College in Jackson, Miss. She is the editor of Theology That Matters: Ecology, Economy and God (2006).

Kevin J. Christiano is an associate professor of sociology who specializes in religion at the University of Notre Dame in South Bend, Ind. He is the author of Sociology of Religion: Contemporary Developments and has written and taught extensively on the sociology of religion.

Laurie M. Johnson is a political science professor at Kansas State University in Manhattan, Kan., where she teaches a course on religion and politics.

Walter Sundberg teaches church history at Luther Seminary in St. Paul, Minn., and has written about religion, politics and trends in American religion.

David J. Scheffer is director of the Center for International Human Rights at Northwestern University and a frequent commentator on human rights issues.

The Carter Center in Atlanta is involved in human rights worldwide. Read the center’s May 14, 2004, publication “Human Rights Defenders on the Frontlines of Freedom: Protecting Human Rights in the Context of the War on Terror.”

Read an October 1989 letter to the bishops of the Catholic Church on the subject of Christian meditation written by then-Cardinal Joseph Ratzinger, now Pope Benedict XVI. In it, Ratzinger addresses yoga.

Read an article about the tensions between secular sports clubs and fitness centers that must pay taxes and their church counterparts (and sometimes competitors) that are tax-exempt.