Zbigniew Kazimierz Brzezinski is a Polish American political scientist, geostrategist, and statesman who served as United States National Security Advisor to President Jimmy Carter from 1977 to 1981. Major foreign policy events during his term of office included the normalization of relations with the People's Republic of China ; the signing of the second Strategic Arms Limitation Treaty ; the brokering of the Camp David Accords; the transition of Iran from an important U.S.