In the light of recent events indicating the collapse of the Cold War, this collection of essays by a leading authority on American post-war foreign policy has an added relevance and urgency today. Individual essays discuss the American style of diplomacy in the twentieth century, the ambiguous nature of morality in American foreign policy, the role of intelligence and espionage, the `relevance' of nuclear weapons in post-war diplomacy, revisionist essays on John Foster Dulles's and Ronald Reagan's Cold War diplomacy, and several essays dealing with questions involving the end of the Cold War.