Henry Alfred Kissinger (May 27, 1923 – November 29, 2023) was an American diplomat, political scientist, and politician. A member of the Republican Party, he served as the 7th national security advisor from 1969 to 1975 and as the 56th United States secretary of state from 1973 to 1977, serving under presidents Richard Nixon and Gerald Ford. Born in Germany, Kissinger emigrated to the United States in 1938 as a Jewish refugee fleeing Nazi persecution. He served in the U.S. Army during World War II. After the war, he attended Harvard University, where he excelled academically. He later became a professor of government at the university and earned an international reputation as an expert on nuclear weapons and foreign policy. He acted as a consultant to government agencies, think tanks, and the presidential campaigns of Nelson Rockefeller and Nixon before being appointed as national security advisor and later secretary of state by President Nixon. An advocate of a pragmatic approach to geopolitics known as Realpolitik, Kissinger pioneered the policy of détente with the Soviet Union, orchestrated an opening of relations with China, engaged in "shuttle diplomacy" in the Middle East to end the Yom Kippur War, and negotiated the Paris Peace Accords, which ended American involvement in the Vietnam War. For his role in negotiating the accords, he was awarded the 1973 Nobel Peace Prize, which sparked controversy. Kissinger is also associated with controversial U.S. policies including its bombing of Cambodia, involvement in the 1971 Bolivian and 1973 Chilean coups d'état, and support for Argentina's military junta in its Dirty War, Indonesia in its invasion of East Timor, and Pakistan during the Bangladesh Liberation War and Bangladesh genocide. Considered by many American scholars to have been an effective secretary of state, Kissinger was also accused by critics of war crimes for the civilian death toll of the policies he pursued and for his role in facilitating U.S. support for authoritarian regimes. After leaving government, Kissinger founded Kissinger Associates, an international geopolitical consulting firm which he ran from 1982 until his death. He authored over a dozen books on diplomatic history and international relations. His advice was sought by American presidents of both major political parties.