Modern physicists have penetrated far beyond vision into an ultimate pantheon of mesons and muons and other demiurges of matter. We have managed to turn their poetic penetration into the physical threats of Three Mile Island and a nuclear arms race. American statesmen after World War II, with uncommon and far-reaching vision, set about restoring a devastated world. The world they produced, a world of free, interdependent, and disputatious nations, seems to many Americans and myopic political leaders a source of embarrassment rather than the fruit of our own farsighted statesmanship.