According to David H. Price, in a chapter entitled "Hoover's Informer", devoted to Murdock during McCarthyism, Murdock had secretly informed on AAA colleagues to J. Edgar Hoover. Murdock was particularly antagonistic of Boasian cultural anthropology, which he considered to be aligned with communist thought. Murdock was not the only person in his field or at his university to cooperate with intelligence agencies. For much of the 20th century, agencies such as the CIA and the FBI enjoyed a close relationship with American universities. Yale University was especially known (later) as a breeding ground for employees of the agencies. Researchers in anthropology and foreign relations were often debriefed after foreign field trips. Murdock later served as chair of the American Anthropological Association's (AAA's) Committee on Scientific Freedom, established to defend anthropologists from unfair attacks.