This is the First Introduction to the United Nations Covering the Entire Postwar Period. It Combines a History of the Un With a Broader Account of East-West Diplomacy During the Cold War and After. Norrie Macqueen Begins by Looking at the Formation, Structure and Functions of the Un. Then, Within a Chronological Framework, He Assesses Its Contribution to International Security From the Emergence of the Un's Peacekeeping Role in 1945-56 Right Through to Un Operations in the 1990S in Angola, Somalia and Bosnia.