Post-war plans increasingly came to the fore as the Allies won several major victories in 1944. The wartime economic boom and the experience of the Great Depression convinced many Americans of the need to lower trade barriers. Lend-Lease agreements included provisions for eliminating tariffs, and the U.S. especially desired the dismantlement of the British Imperial Preference system. At the Bretton Woods Conference, the Allies agreed to the creation of the International Monetary Fund, which would provide for currency stabilization, and the World Bank, which would fund post-war rebuilding. Taking up the Wilsonian mantle, Roosevelt also pushed for the establishment of the United Nations, a permanent intergovernmental organization that would succeed the League of Nations.