How is American foreign policy different today than it was during the early years of the republic?

How is American foreign policy different today than it was during the early years of the republic? What were some of the causes and results of the historical change in American foreign policy?

The whole world is very different today than it was in the early years of the Republic, so our foreign policy is different by necessity.

The U.S. had much more isolationist tendencies in the early years. This was largely because it had not yet established itself as a military power. We were afraid of wars with the big European nations that had massive navies, since we weren't eager to repeat the Revolution.

It's hard to say, actually whether the U.S. really even HAD a "foreign policy" after the revolution. In those days, unless you were a big powerful colonial power, you basically minded your own business.