and the widening of the Cold War. Being in the best position to take advantage of free trade, culturally indisposed to traditional empires, and alarmed by the rise of communism in China and the detonation of the first Soviet atom bomb, the historically non-interventionist US also took a keen interest in developing multilateral institutions which would maintain a favorable world order among them. The International Monetary Fund and International Bank for Reconstruction and Development (World Bank), part of the Bretton Woods system of international financial management was developed and, until the early 1970s, the existence of a fixed exchange rate to the US dollar. The General Agreement on Tariffs and Trade (GATT) was developed and consists of a protocol for normalization and reduction of trade tariffs. With the fall of the Iron Curtain, the demise of the notion of a Pax Sovietica, and the end of the Cold War, the US maintained significant contingents of armed forces in Europe and East Asia. The institutions behind the Pax Americana and the rise of the United States unipolar power have persisted into the early 21st century. The ability of the United States to act as "the world's policeman" has been constrained by its own citizens' historic aversion to foreign wars. Though there has been calls for the continuation of military leadership, as stated in "Rebuilding America's Defenses": The American peace has proven itself peaceful, stable, and durable. It has, over the past decade, provided the geopolitical framework for widespread economic growth and the spread of American principles of liberty and democracy. Yet no moment in international politics can be frozen in time; even a global Pax Americana will not preserve itself. [... What is required is] a military that is strong and ready to meet both present and future challenges; a foreign policy that boldly and purposefully promotes American principles abroad; and national leadership that accepts the United States' global responsibilities. This is reflected in the research of American exceptionalism, which shows that "there is some indication for [being a leader of an 'American peace'] among the [US] public, but very little evidence of unilateral attitudes". Resentments have arisen at a country's dependence on American military protection, due to disagreements with United States foreign policy or the presence of American military forces. In the post-communism world of the 21st-century, the French Socialist politician and former Foreign Minister Hubert Védrine describes the US