Bradley Wright, a University of Connecticut sociologist, is the author of Christians Are Hate-Filled Hypocrites … and Other Lies You’ve Been Told (2010). He asserts that infidelity occurs less frequently among churchgoers.

David Kinnaman is president of the Barna Group, which conducts research on religious life within the United States and around the world.

Amy Burdette, a sociologist at Florida State University, has conducted research into whether infidelity, marijuana use and other behaviors are more or less common among churchgoers.

The National Marriage Week USA website brings together the many activities that organizations throughout the country, including churches and houses of worship, are doing to strengthen marriage during National Marriage Week USA, Feb. 7-14 each year.

The National Association of Catholic Family Life Ministers works with the U.S. bishops to implement initiatives on behalf of marriage and family life. It also has contact with many other Catholic associations and groups that promote marriage and family life.

The National Center for Family & Marriage Research at Bowling Green State University in Ohio supports research on the effects of family structure on family members and the wider society. Research topics supported by the center include religion and spirituality. The center’s website has links to other research centers, too.

The Marriage & Religion Research Institute archives data about marriage from a number of sources. It also posts links to scholars around the country.

The Barna Group provides a summary page on family and kids.

ReligiousTolerance.org provides an article on marriage and divorce in Islam.