Henry Alfred Kissinger (born May 27, 1923) is a German-born American political scientist, diplomat, and recipient of the Nobel Peace Prize. He served as National Security Advisor and later concurrently as Secretary of State in the administrations of Presidents Richard Nixon and Gerald Ford. After his term, his opinion was still sought out by many following presidents.
A proponent of Realpolitik, Kissinger played a dominant role in United States foreign policy between 1969 and 1977. during this period, he pioneered the policy of détente with the Soviet Union, orchestrated the opening of relations with China, and negotiated the Paris Peace Accords, ending American involvement in the Vietnam War. His role in the bombing of Cambodia and other American interventions abroad during this period remains controversial.