Gratitude is the fruit of great cultivation; you do not find it among gross people. -- Samuel Johnson
In the movie "Captain America: The First Avenger", the redskull makes an observation about Captain America: (who in some sense personifies American virtue, at least in the movie) "Arrogance may not be a uniquely American trait, but I must say, you do it better than anyone."
To that one might add, giving thanks is not a uniquely American trait, but we really do do it better than any other country. Here is wishing everyone a Happy Thanksgiving!