There are three tenets that comprise the notion of American exceptionalism. The first is that the history of America’s founding (as a bastion of freedom and acceptance for all, regardless of their political or religious leanings) imbues the United States with different DNA than that of every other country in the world.
The second is that America’s purpose is to serve as a force for positive change in the world. And the third is that the first two tenets combined serve as incontrovertible proof that the United States is naturally superior to other nations.
A Hopeless Cynic 