> Basic history of the United States is that it was, broadly, a non-interventionist nation that refused to get involved in other nations wars.
I do think the Native Americans would beg to differ. (Indian Removal Act of 1830). Furthermore, the American explicit foreign policy was "Stay out of America so that we can colonize it better". That included South America and the Central America island countries as well.
In 1878 for example, we sailed our Navy to Samosa and threatened war with Germany.
http://en.wikipedia.org/wiki/Tripartite_Convention
The current topic is about a trade dispute regarding the purchase of American Pesticides in Europe. America always had foreign policy and trade disputes.
Now, I agree that during the 1850s, US Foreign Relations more or less stood still. There was something called the Civil War, and we kind of didn't focus on foreign affairs.
Pretending that we were always an isolationist nation is an error! Our rise as a world power (and global politics) began almost immediately after we rebuilt during the Civil War.
Before the Civil War, America wasn't exactly powerful enough to push other nations around in global politics. But we definitely pushed the Native Americans around and expanded with Manifest Destiny, and utilized the Monroe Doctrine to keep other European Countries from settling the region. To claim the Monroe doctrine as a "isolationist" strategy misses the point of Manifest Destiny... American Ambitions to conquer all the land from east coast to west coast is evident even as early as the 1830s.
US-Mexico War, as well as other "threatened wars" (54/40 or fight), various boarder disputes with Canada.... all show the ambitions of the fledgling United States.
The concept of "Manifest Destiny" drove our foreign politics at the time. And that was _anything_ but isolationist.
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Here's another major counterexample:
http://en.wikipedia.org/wiki/Embargo_Act_of_1807
And all of the other (most certainly NOT isolationist) events that pissed of Britain enough that it led to the war of 1812.