The most accurate response is:
The country’s foreign policy has shifted from an isolationism perspective to an internationalism perspective.
During the founding era, the U.S. largely adhered to an isolationist policy, focusing on domestic affairs and avoiding entanglements in European conflicts. Over time, particularly after events like World War II, U.S. foreign policy evolved towards a more internationalist approach, engaging with other nations through alliances, organizations, and global initiatives.