Karl Marx expected the worldwide proletariat to be the vanguard of a coming socialist revolution, but when a U.S. Communist leader told Joseph Stalin that Americans didn't think of themselves as the proletariat and had no intention of playing that role, Stalin is reported to have shouted, "Away with the heresy of American exceptionalism!" Some think that Stalin may have started the use of the term exceptional to describe the United States.
One of the most significant things about America's exceptionalism is that our Constitution made the right of inventors to own their own inventions a constitutional right. This right of inventors is uniquely American: it was an original creation by the Founding Fathers and it's still unique in the world. That's why 95% of the world's great inventions are American. Our superiority in inventions and innovations is a principal factor in our exceptional high standard of living. Yes, indeed, America is very exceptional.
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