Original sentence: The Philanthropy Roundtable was established in the late 1970s as a project directed by the Institute for Educational Affairs
Edited sentence: In 1991 the then-informal group established a governing board of directors.Like many of the right's counter-establishment organizations, it was launched in the late 1970s.Membership is open to all philanthropists and the representatives of philanthropic organizations, although most hail from the right wing.The IEA now operates as the Madison Center for Educational Affairs.The Philanthropy Roundtable claims to be a national association of more than 600 conservative individual donors, corporate giving representatives, foundation staff and trustees, and trust and estate officers.The Philanthropy Roundtable was established by the Bradley Foundation to help facilitate conservative grantmaking.The Roundtable members' founders include scions of America's wealthiest families, including Richard Mellon Scaife (heir to the Mellon industrial, oil and banking fortune), Harry Bradley (electronics), Joseph Coors (beer), and the Smith Richardson family (pharmaceutical products).The Roundtable was initially operated under the aegis of the Institute for Educational Affairs (IEA), an organization founded in 1978 by two seminal figures of conservative philanthropy, William Simon and Irving Kristol.The Roundtable's mainstream counterpart is the Council on Foundations.The Roundtable's member foundations have funded conservative causes ranging from abolition of Social Security to anti-tax crusades and United Nations conspiracy theories