Yesodot is a nonprofit that works to build community foundation and support for Jews in the Boston area who have disabilities or special needs. It also provides parental and sibling support.

The Jewish Historical Society of Napa Valley chronicles Jewish life and history in the Northern California winemaking region.

The Dallas Jewish Historical Society focuses on the history of Jews in Dallas. Deborah Tobias is executive director.

The National Organization for Marriage lists its mission as “to protect marriage and the faith communities that sustain it.”

The Institute for Marriage and Public Policy, based in Manassas, Va., posts research briefs on marriage-related topics. The institute also hosts a Marriage Debate blog.

The Chicago Jewish Historical Society chronicles the history, life and experience of that city’s Jews.

The Jewish Historical Society of MetroWest concentrates on the Jewish experience in Essex, Morris, Sussex and portions of northern Union counties of New Jersey. Linda Forgosh is executive director.

The Jewish Historical Society of Central Jersey serves the communities of Middlesex, Union, Somerset, Warren and Hunterdon counties in New Jersey. It is in New Brunswick.

The Jewish Historical Society of Greater New Haven focuses on the Jewish culture and history in and around New Haven, Conn. Judith Schiff is executive director.