The Cato Institute is a public policy research organization dedicated to the principles of individual liberty, limited government, free markets and peace.

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 Family Research Council is a Christian organization promoting the traditional family unit and the Judeo-Christian value system. Press contacts are J.P. Duffy or Alice Chao.

The Alliance for Marriage has pushed for a constitutional amendment banning same-sex marriages nationwide.

The United for Marriage Coalition is an umbrella group advocating for marriage rights for gays and lesbians. Faith groups (and nontheist organizations) are among the group’s members.

Lambda Legal works to achieve full recognition of rights, including marriage, for LGBT people.

The Gay & Lesbian Alliance Against Defamation seeks to advance public understanding and acceptance by sharing the stories of LGBT people. GLAAD has posted an online resource kit for reporters covering the Supreme Court cases. It includes a report on a three-year academic study that concluded the news media give disproportionate weight to anti-LGBT voices in stories about religious views of […]

The New York City-based organization Freedom to Marry is working to obtain same-sex marriage rights nationwide and to overturn the federal Defense of Marriage Act. Evan Wolfson is president.

The American Bar Association is the one of the largest voluntary professional membership organizations in the world.