After World War 2, Americans viewed the role of the United States as being a global leader. Th US emerged from the war as the most powerful country in the world, both militarily and economically, and it was seen as having a responsibility to use this power to promote peace and democracy around the world. This was reflected in the formation of the United Nations, which was designed to provide a forum for international cooperation and prevent future conflicts. The US also played a leading role in the development of the Marshall Plan, which provided economic aid to Europe to help it rebuild after the war. The US also became involved in a number of military conflicts during this period, including the Korean War and the Vietnam War, as it sought to contain the spread of communism. Overall, the US saw itself as having a moral obligation to use its power and influence to make the world a better place.