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I am sad to see that here it is indirectly and wrongly suggested that Cooper diminishes the role of religion, or that he regards it as a "useless" in the wilderness. You're not being fair to Cooper since he is not using the character of David Garmout to criticize the role of religion in general. To assume such interpretation would be to neglect Cooper’s own position towards religion.
It's worth stating that James Fenimore Cooper was actually a religious man, and not only the great support he gave to his Episcopal Church is a testimon