Isolationism is a recurring theme in us foreign policy?

Answer 1

From a historical standpoint, American foreign policy was one of constant change, starting from one of neutrality, changing to one of isolationism, retreating back to neutrality and then finally engaging in a complete interventionist approach in the aftermath of World War II. After the collapse of the Soviet Union in 1991, the U.S. solidified its place in the world as the world's sole superpower. Consequently, interventionism became a central and dominant theme in America's foreign policy.

from this short historical background, one can safely conclude that the statement about isolationism being a recurring theme in the American foreign policy is not particularly accurate.