What World War I Did to U.s.

H. L. Mencken had his moments:

The old theory of a federation of free and autonomous states has broken down by its own weight, and we are moved toward centralization by forces that have long been powerful and are now quite irresistible. So with the old theory of national isolation: it, too, has fallen to pieces. The United States can no longer hope to lead a separate life in the world, undisturbed by the pressure of foreign aspirations. We came out of the war to find ourselves hemmed in by hostilities that no longer troubled to conceal themselves, and if they are not as close and menacing today as those that have hemmed in Germany for centuries they are none the less plainly there and plainly growing. Roosevelt, by whatever route of reflection or intuition, arrived at a sense of these facts at a time when it was still somewhat scandalous to state them, and it was the capital effort of his life to reconcile them, in some dark way or other, to the prevailing platitudes, and so get them heeded. To-day no one seriously maintains, as all Americans once maintained, that the states can go on existing together as independent commonwealths, each with its own laws, its own legal theory and its own view of the common constitutional bond. And to-day no one seriously maintains, as all Americans once maintained, that the nation may safely potter on without adequate means of defense. However unpleasant it may be to contemplate, the fact is plain that the American people, during the next century, will have to fight to maintain their place in the sun. (“Roosevelt: An Autopsy” 1920)

Sounds about right.