The document provides an overview of the Cold War between the United States and Soviet Union from 1945 to 1990. It discusses the origins of the Cold War following World War 2, key events that expanded tensions like the Cuban Missile Crisis, periods of détente, the reemergence of tensions in the late 1970s, and the ultimate end of the Cold War with the fall of the Soviet Union in 1991. The document aims to define the Cold War, trace its causes, understand its dimensions, and analyze its impact on the global order.