Some people thought that American independence was Manifest Destiny, '"'Tom Paine, for example, claimed that it was simply a matter of common sense that an island could not rule a continent.'"' But for the most part, triumph of the American revolution was improbable, and therefore it is a remarkable event in history. No one expected that Britain, the strongest country in the world would be defeated by the colonies, and that America"'"s Republic, a government uncommon in those monarchial days, would survive, yet it did.

It is only now in retrospect that the American Revolution seems inevitable. To the participants it seemed to be a long-shot. They were not expecting victory, always fearing execution for treason. Rightly so, too, since the British could have easily won the war if they had fought more forcefully in its earliest stages.

Once the...