Why is it immoral for a person to treat himself as an exception? The reason is plain: because morality, by definition, means a standard of right and wrong that applies to all persons without exception. Yet to answer so briefly may be to oversimplify.
Let’s be Americans, which means being exceptional, which also means being honest in ways inconceivable to the rest of humanity. So here’s the truth of it: the American exceptionalism sweepstakes really do matter. Here. A lot.
The Founders did not regard their weak new republic as intrinsically superior or chosen by God to rule the world—but argued instead that the ideals of popular sovereignty and constitutional freedom represented the natural rights and the future of humanity everywhere.