After years of denying that the Koch Foundation exercised control of hiring and firing professors by giving millions of dollars, George Mason University was compelled by the release of documents to admit that it was true. Virginia's largest public university granted the conservative Charles Koch Foundation a say in the hiring and firing of professors in exchange for millions of dollars in donations, according to newly released documents. Diane Ravitch points out that "300 colleges have accepted Koch funding. When Duke historian Nancy MacLean wrote “Democracy in Chains,” criticizing the Koch-funded economist James Buchanan, she was viciously attacked by libertarians for her portrayal of Buchanan as anti-democratic and unduly influenced by Koch libertarianism. She must be smiling as the mask of impartial scholarship is stripped away by student activists."