Kathryn Rettig is a professor of family social science at the University of Minnesota who has looked at marriage issues, child support systems and the values underlying end-of-life decisions.

The Washington Interfaith Network is a coalition of 45 congregations that works on increasing the amount of affordable housing, both by building it and by lobbying city officials to create it. WIN is affiliated with the Industrial Areas Foundation.

The Reformed Church of Highland Park Affordable Housing Corp., in East Brunswick, N.J., was created to build six apartments for girls to live in after they are too old to be in the foster-care system. The church created the entity after deciding it needed to help provide affordable housing.

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

Read a July 3, 2011, essay in The New York Times about the increasing disparity in marriage patterns of the affluent and the poor.

The West Central Episcopal Mission in Spokane, Wash., is dedicated to relieving urban poverty, addressing the root of its causes, and saving the environment one step at a time. The Rev. Kris Christensen is executive director and urban missioner.

ARISE includes 12,000 members of congregations and community groups around Albany, N.Y. Affordable housing is one of its goals, and it is promoting a regional housing plan.

Derek E. Broomes is president and chief executive officer of Harlem Congregations for Community Improvement, which has developed more than 2,000 units of affordable housing. It is a diverse, interfaith coalition of more than 90 congregations.

Faith in New York, which is affiliated with PICO, is involved in affordable housing.