Diplomacy is a 1994 book written by former National Security Advisor and Secretary of State Henry Kissinger. It is a sweep of the history of international relations and the art of diplomacy, largely concentrating on the 20th century and the Western World. Kissinger, as a great believer in the realist school of international relations, focuses strongly upon the concepts of the balance of power in Europe prior to World War I, raison d’État and Realpolitik throughout the ages of diplomatic relations. Kissinger also provides insightful critiques of the counter realist diplomatic tactics of collective security, developed in the Charter of the League of Nations, and self determination, also a principle of the League. Kissinger also examines the use of the sphere of influence arguments put forth by the Soviet Union in Eastern and Southern Europe after World War II; an argument that has been maintained by contemporary Russian foreign relations with regard to Ukraine, Georgia and other former Soviet satellites in Central Asia.
The history begins in Europe in the 17th century, but quickly advances up to the World Wars and then the Cold War. Kissinger refers to himself numerous times in the book, especially when recounting the Richard Nixon and Gerald Ford presidencies.
Kissinger dedicated the book to the men and women of the United States Foreign Service.