Bertram David Wolfe was an American scholar, leading communist, and later a leading anti-communist. He authored many works related to communism, including biographical studies of Vladimir Lenin, Joseph Stalin, Leon Trotsky, and Diego Rivera.

Jay Lovestone was an American activist. He was at various times a member of the Socialist Party of America, a leader of the Communist Party USA, leader of a small oppositionist party, an anti-Communist and Central Intelligence Agency (CIA) helper, and foreign policy advisor to the leadership of the AFL–CIO and various unions within it.