For almost a century and a half, successive American governments adopted a general policy of neutrality on the world stage, eschewing involvement in European conflicts and, after the Quasi War with France, alliances with European powers. Neutrality, enshrined as a core principle of American foreign relations by the outgoing President George Washington in 1796, remained such for more than a century.
Finally, in the 20th century, the United States emerged as a world power and a belligerent in the two world wars and the Cold War. This article explores the modern conflict between traditional American attitudes toward neutrality and the global agenda embraced by successive U.S. governments, beginning with entry in the First World War. With the United States immersed in these titanic struggles, the traditional U.S. support for neutrality eroded considerably. During the First World War, the United States showed some sympathy for the predicaments of the remaining neutral powers. In the Second World War it applied considerable pressure to those states still trading with Germany. During the Cold War, the United States was sometimes impatient with the choices of states to remain uncommitted in the global struggle, while at times it showed understanding for neutrality and pursued constructive relations with neutral states. The wide varieties of neutrality in each of these conflicts complicated the choices of U.S. policy makers. Americans remained torn between memory of their own long history of neutrality and a capacity to understand its potential value, on one hand, and a predilection to approach conflicts as moral struggles, on the other.
