The Rockefeller Brothers Fund was established in 1940 by the five sons of
John D. Rockefeller Jr. The five Rockefeller brothers served as the Fund's first five trustees. In 1951, the Fund grew substantially when it received a $58 million endowment from John D. Rockefeller Jr. Initially, the Rockefeller Brothers Fund pursued largely philanthropic interests. Laurance continued his father John D. Rockefeller II's interest in nature conservation, so that the fund's money expanded the family's
Wyoming land trusts, which formed the basis of the
Grand Teton National Park. Nelson continued his mother Abby
Aldrich Rockefeller's interest in contemporary art, and the Rockefeller Brothers Fund became one of the largest supporters of the
Museum of Modern Art. John D. Rockefeller was one of the pioneers of population policy, and the fund was one of the most important supporters of the
Population Council. In 1999, the Fund merged with the Charles E. Culpeper Foundation. On September 30, 2014, the Rockefeller Brothers Fund announced that it planned to
divest its assets from fossil fuels. On disinvesting from
fossil fuels, the president of the Rockefeller Brothers Fund,
Stephen Heintz, said: "We see this as both a moral imperative and an economic opportunity". Two years later, the
Rockefeller Family Fund— a distinct, independent institution, as is the Rockefeller Brothers Fund—announced its pending divestment from fossil fuels, on March 23, 2016. ==Special Studies Project==