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According to the guidelines provided to those applying for U.S. citizenship, a person may decline to take the oath of loyalty to the U.S. Constitution if this oath conflicts with a religious belief. Despite the nation-state's prerogative to make deep claims upon the loyalty of its citizens, it often recognizes that the highest truths are not necessarily to be found within the national community, but in a transcendent or universal realm. Indeed, nations tend to recognize the superiority of religious truths because their own raison d'être is often founded in a spiritual or universal truth. The discourse of civilization in the era of nation-states is closely tied to this yearning for a transcendent spiritual purpose.
Prasenjit Duara (Thu,) studied this question.