Probably all western nations consider themselves exceptional. The British built an empire, but by now, as Philip Stephens put it in his recent article /FT, 15 May 2020/, British exceptionalism has run its course.
The same is true for all western exceptionalism due to the rise of old/new Asian powers.
For a nation, being exceptional might mean that all members belonging to the same mega-tribe are exceptional. It may make one feel good, but it might result in larger-than-life egos and oversized individualism.
All of these will run their course because they lead to complacency at first and huge mistakes later.
Epictetus, Seneca, Confucius and Lao Tzu might help a lot in going back to our humble roots.
Governor Matolcsy, MNB, the Central Bank of Hungary