InfluenceWatch - MacArthur Foundation
webThis InfluenceWatch profile is a watchdog-style reference on the MacArthur Foundation, useful for understanding philanthropic funding landscapes adjacent to AI safety and governance, but not directly focused on AI safety itself.
Metadata
Importance: 15/100wiki pagereference
Summary
InfluenceWatch profile of the John D. and Catherine T. MacArthur Foundation, a major philanthropic organization that funds a wide range of causes including nuclear security, climate change, journalism, and international peace. The profile examines the foundation's grantmaking priorities, leadership, and political affiliations from a watchdog perspective. MacArthur has some relevance to AI governance through its funding of policy and security research.
Key Points
- •MacArthur Foundation is one of the largest private foundations in the US, with assets exceeding $7 billion and broad grantmaking across global issues.
- •The foundation funds programs in nuclear security and international peace, areas that overlap with existential risk and global catastrophic risk reduction.
- •InfluenceWatch provides a critical/watchdog perspective on the foundation's political leanings and organizational affiliations.
- •MacArthur has historically funded think tanks and policy organizations relevant to technology governance and security.
- •Limited direct AI safety focus, but relevant as a major funder in adjacent governance and existential risk spaces.
Cited by 1 page
| Page | Type | Quality |
|---|---|---|
| MacArthur Foundation | Organization | 65.0 |
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John D. and Catherine T. MacArthur Foundation - InfluenceWatch
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John D. and Catherine T. MacArthur Foundation
MacArthur Foundation logo, current as of March 2013 ( link )
Website:
www.macfound.org
Location:
CHICAGO, IL
Tax ID:
23-7093598
Tax-Exempt Status:
501(c)(3)-PF
Budget (2023):
Revenue: $613,786,298
Expenses: $415,250,452
Assets: $8,672,283,398
Type:
Grantmaking organization
Formation:
1970
Board Chair:
Marjorie Scardino
President:
John Palfrey
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The John D. and Catherine T. MacArthur Foundation (also known as the MacArthur Foundation) was the 20th-largest foundation in the world as of 2024, with total assets over $8 billion. 1 From 2000 to 2017, MacArthur granted an average of just over $200 million each year to programs in support of higher education, the arts, mental health, and a large number of left-of-center causes including human rights, international affairs, disarmament, environmentalist policy, population control, abortion access, economic development, affordable housing, and juvenile justice policy. 2
Many left-of-center grantees have received more than $5 million in MacArthur grants since 1987, among them Planned Parenthood , the Population Council , the Carter Center , ProPublica , Union of Concerned Scientists , Environmental Defense Fund , ClimateWorks , and International Crisis Group . 3 Since 2015, the foundation has focused its grantmaking on “Big Bets” — program areas that include climate change, criminal justice reform, and nuclear nonproliferation. 4
The MacArthur Foundation also funds a Fellows Program, popularly known as “Genius Grants.” Fellowships are five-year, unrestricted “stipends” to individuals “who show exceptional merit and promise of continued creative work.” In 2025, the stipend was for $800,000. 5 6 7 Most fellows are not noticeably political, but a sizeable minority are recognized because of their left-of-center political activism. Grantees have included a number of environmentalists and community organizers, 8 9 and transgender performer. 5 The left-of-center weekly Chicago Reader wrote in 2015: “There could hardly be a more liberal grant than the MacArthur Fellowship.” 10
The Foundation was started by John D. MacArthur, a banker and insurance salesman who was one of two billionaires alive at th
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