How has America changed in the world since the 1930s?

Since the 1930s, America has transformed from a predominantly isolationist nation to a leading global superpower. Post-World War II, the U.S. took on a significant role in international politics, establishing institutions like the United Nations and NATO, and promoting democratic values and capitalism worldwide. Economically, it shifted from a focus on industrialization to a technology-driven economy. Additionally, cultural influences, particularly through media and entertainment, have made American culture a dominant force globally.