Answer :
U.S. participation in the General Agreement on Tariffs and Trade (1947) and in the North Atlantic Treaty Organization (1949) exemplifies the country's foreign policy shift from isolationism to internationalism after World War II.
1. **Isolationism to Internationalism:** After World War II, the United States shifted its foreign policy from isolationism to internationalism. Isolationism refers to the policy of avoiding political or economic alliances with other countries. In contrast, internationalism involves actively engaging with other nations through agreements, treaties, and organizations to promote cooperation and global stability.
2. **General Agreement on Tariffs and Trade (GATT):** The U.S. participation in GATT in 1947 was a significant step towards promoting international trade and economic cooperation. GATT aimed to reduce trade barriers, promote fair competition, and boost economic growth among member countries by establishing a framework of rules for international trade.
3. **North Atlantic Treaty Organization (NATO):** The establishment of NATO in 1949 was a pivotal moment in U.S. foreign policy, signaling a commitment to collective security and mutual defense with European allies. NATO aimed to counter Soviet expansionism and maintain stability in Europe through military cooperation and a collective defense strategy.
4. **Foreign Policy Shift:** By actively participating in GATT and NATO, the United States demonstrated its transition from a more isolationist stance to embracing internationalism. This shift reflected a recognition of the interconnectedness of global affairs and the importance of diplomatic engagement to address post-war challenges and promote peace and prosperity on a global scale.