American exceptionalism is the belief that America is the greatest and freest nation on earth, destined to guide mankind to true freedom. The supporters of this idea adduce America's unique history and establishment, as well as its values, ideals, and strength.
No, America is not exceptional
America being exceptional is a national myth which is inconsistent with the reality of global history.
American history exists in a global context
The United States is not immune to larger tides and trends in global history. Events in American history fit in a much wider global context.
Yes, America is exceptional but not necessarily in a good way
America is exceptional for the wrong reasons. It has a history of brutality against other peoples, a record of fighting many wars wherein scores of civilians were killed, and it refuses to sign most human rights treaties. It is exceptional from these mistakes, not its successes.
America has many characteristics that make it stand out
America's somewhat self-congratulatory portrait of itself and largely unchallenged faith in American exceptionalism is not necessarily an opinion shared by other countries.