Final answer:
The U.S. subscribed to isolationism after World War I and expanded international trade after World War II.
Step-by-step explanation:
One major difference between the U.S. economy post-World War I and post-World War II was that the U.S. subscribed to a policy of isolationism after World War I, but expanded international trade and multinational corporations after World War II. After World War I, the U.S. retreated from global affairs and implemented protectionist policies like high tariffs, whereas after World War II, the U.S. actively participated in creating a global economic system, promoting free trade, and establishing organizations like the World Bank and the International Monetary Fund (IMF). This shift in economic policies greatly influenced the U.S. role in the world and its level of involvement in international trade.
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