sentences:  American "Realpolitik" began in the 1960s with the influence of Polish-American Zbigniew Brzezinski, later National Security Adviser to Jimmy Carter.Contrary to McCarthy-era hostility and John Foster Dulles's talk of the military "liberation" of the Eastern Bloc, Brzezinski proposed "peaceful engagement" with the Soviet Union while he advised Presidents John F. Kennedy and Lyndon B. Johnson.Brzezinski, uninterested in promoting anti-Soviet propaganda for the benefit of the United States, felt the United States would be more successful through frequent interactions with regimes and people under communist rule.