Manifest Destiny, Nationalism, Cosmopolitanism

"Manifest Destiny" usually characterizes the progress from Atlantic to Pacific of the settling of the North American continent. But, the history of that settlement traces another arc, whether or not by design.  What begins as relatively homogeneous eventually becomes the perhaps most heterogeneous polity in recorded history. Now, while the image 'Melting Pot' that is ofen used to describe this diversity is abstract, it has become concrete at one location within the U. S.--the United Nations.  So, insofar as the latter is considered the manifestation of American destiny, the arc is that of the transition from Nationalism to Cosmopolitanism, a transition that is still in process.