The Proteus Fund is a left-of-center “pass-through” funder and donor-advised fund provider. Since the Fund’s creation in 1995, Proteus has routed hundreds of millions of dollars from major grantmaking foundations and anonymous donors on the Left to activist groups targeting issues including legalizing same-sex marriage, reducing religious freedom to dissent

ProPublica is an investigative journalist organization which publishes reports on perceived and actual abuses of power by governments, businesses, and other entities. 65 Its database of 9.6 million tax filing 990 documents for non-profits is used frequently by

Population Connection is a left-leaning nonprofit advocacy group that supports global population control policies. The organization was founded in 1968 as Zero Population Growth by environmentalist and population control activist Paul Ehrlich directly following the publication of his controversial 1968 book, The Population Bomb. The organization affirms that population

PolicyLink is a left-of-center research and advocacy group that promotes critical race theory and attempts to influence policy in the United States, especially on issues of economics and race. 125 The charitable organization is based in Oakland,

People for the American Way (PFAW) is a left-of-center advocacy group formed in 1981 by Hollywood television producer Norman Lear to oppose conservative televangelists.

The NoVo Foundation is the private foundation controlled by Peter Buffett, son of investor and left-of-center philanthropist Warren Buffett, and Peter’s wife Jennifer. Warren provided the initial donation of 350,000 shares of Berkshire Hathaway valued at $1 billion

The National Immigration Forum (NIF) was established in 1982 to advocate for immigrants in the United States. The organization advocates for granting legal status to most illegal immigrants already in the United States and staunchly opposes border enforcement policies. The organization also promotes naturalization and learning English. Background Rick Swartz,

Make the Road New York (MRNY) is a New York-based community organizing group that promotes left-of-center social and political causes, especially in the areas of immigration and labor policy.

The Lawyers’ Committee for Civil Rights Under Law (LCCRUL) is a left-of-center organization of attorneys formed after a request from President John F. Kennedy to support federal civil rights initiatives following a federal integration order for the University of Alabama in 1963 and subsequent protest marches in Mississippi.

The Human Rights Campaign (HRC) is the nation’s largest LGBT-interest activist organization and a prominent force in left-of-center politics. Together with the affiliated Human Rights Campaign Foundation charitable arm and super PAC, HRC has built relationships with powerful mostly Democratic Party politicians and major corporations, and has taken a

The Environmental Defense Fund (EDF) is a nonprofit environmental group known for promoting policies concerning global warming and left-of-center climate policy advocacy. 550

Educational Foundation of America (EFA) is a major left-of-center grant maker that funds environmentalist, educational, and voter-mobilization initiatives. EFA purports to be a family foundation that aims to create a society with “an inclusive democracy,” in which each person has “unrestricted access to full reproductive freedom” and lives on a

Dustin Aaron Moskovitz is an American Internet entrepreneur who co-founded Facebook with Mark Zuckerberg, Eduardo Saverin, Andrew McCollum and Chris Hughes. In 2008, he left Facebook to co-found Asana with Justin Rosenstein. 627

William J. Brennan Center for Justice (Brennan Center) is a self-described “liberal” 634

The William and Flora Hewlett Foundation (also known as the Hewlett Foundation) is a private foundation established in 1966 by Hewlett-Packard co-founder William R. Hewlett, his wife Flora, and his son Walter.

The Union of Concerned Scientists (UCS) is a Cambridge, Massachusetts-based activist group that uses science policy and climate change to advocate for left-of-center policies. As an activist organization, UCS began in the late 1960s with opposition to the Vietnam War and U.S. nuclear weapons testing, later coming to oppose peaceful

The Franklin and Eleanor Roosevelt Institute is a left-of-center think tank that argues capitalism is inherently unjust. It brings together left-of-center and Democratic lawmakers, economists, and academics to attempt to reshape policies, from the federal to the local levels.

The Mangrove Foundation was a subsidiary of the Atlantic Philanthropies, a private foundation created in 1982 by Irish-American businessman Chuck Feeney. The Atlantic Philanthropies focused its advocacy on health, social, and politically left-of-center public policy causes in Australia, Bermuda, Ireland, South Africa, the United States, and Vietnam.

The Rockefeller Foundation is a philanthropic grantmaking organization based in New York City. It was founded in 1913 as the primary philanthropic vehicle for the charity of Standard Oil billionaire John D. Rockefeller, Sr. (1839-1937). With an endowment estimated to be worth $6 billion as of 2025, the Rockefeller Foundation

The Rockefeller Family Fund is the nonprofit organization supporting the philanthropy of the great-grandchildren of John D. Rockefeller and the grandchildren of John D. Rockefeller, Jr. The “cousins,” as Rockefeller Jr.’s grandchildren came to be known, were major supporters of left-wing counterculture causes as early as the 1960s. In 1992,