Frederick Vanderbilt Field was an American leftist political activist, political writer and a great-great-grandson of railroad tycoon Cornelius "Commodore" Vanderbilt, disinherited by his wealthy relatives for his radical political views. Field became a specialist on Asia and was a prime staff member and supporter of the Institute of Pacific Relations. He also supported Henry Wallace's Progressive Party and so many openly Communist organizations that he was accused of being a member of the Communist Party. He was a top target of the American government during the peak of 1950s McCarthyism. Field denied ever having been a party member but admitted in his memoirs, "I suppose I was what the Party called a 'member at large.'"