Kissinger, a new two-part, three-hour biography, offers an incisive portrait of Henry Kissinger, the enigmatic powerbroker who served in the topmost echelons of American diplomacy. Whether celebrated or reviled, Kissinger’s contradictions reflect those at the heart of America’s foreign policy during the second half of the 20th century, a period in which America became the unchallenged superpower in the world yet often pursued policy at odds with its own highest ideals.