The Society for Humanistic Judaism says it “offers a nontheistic alternative in contemporary Jewish life.” It was organized in Detroit in 1969 and has since added chapters and affiliated congregations around the United States.

Congregation Or Atid, a Conservative synagogue in Richmond, Va. conducts a “Switch Day,” when members take the shifts of Christian volunteers at nearby Beth Sholom Nursing Home.

Since 1990, Cedar Village, a retirement and nursing home in Mason, Ohio, has held a “Mitzvah Day” every Dec. 25, in which Jewish staff members volunteer to work for Christian staffers. Contact Rachel Festenstein, director of marketing and community outreach.

Human Rights Watch is an independent, nongovernmental organization dedicated to protecting human rights worldwide. Contact HRW via one of its local offices.

Ricken Patel is founding President and Executive Director of Avaaz, “a global web movement to bring people-powered politics to decision-making everywhere.” Avaaz has more than 20 million subscribers and activists.

Gregory Stanton is president of Genocide Watch, a Washington, D.C., organization that “exists to predict, prevent, stop, and punish genocide and other forms of mass murder,” including in Sudan. Its board of advisers includes academics from around the country.

United to End Genocide began as the Genocide Intervention Network at Swarthmore College in 2005 as a way to raise money to help resolve the Darfur crisis. It has developed into a network of campus groups across the country. It is now based in Washington, D.C.

The Save Darfur Coalition is an alliance of more than 170 faith, advocacy and humanitarian organizations, representing all the major religions and dozens of Jewish, Muslim and Christian groups. It advocates for public awareness and public policy change and provides aid. It is now part of the United to End Genocide coalition.

Sharon Pucker Rivo is executive director of the National Center for Jewish Film at Brandeis University in Waltham, Mass., and an associate professor of Near Eastern and Judaic studies who teaches a course on Jewish film.