In a conversation with a professor of mine about a paper assigned by another professor, he and I drew parallels between Roman emperors and  Tolkein's Denethor. Specifically, Denethor claims in his conversation with Gandalf that he is the only bastion against the darkness of Mordor. He, like Rome, builds his power on the claim that Gondor is the only hope for civilization in a terrible struggle against all the powers of ignorance, darkness, and barbarism. Denethor claims to be culture and light, he claims that Gondor is peace. 


"If you understand it, then be content," returned Denethor. "Pride would be folly that disdained help and counsel at need; but you deal out such gifts according to your own designs. Yet the Lord of Gondor is not to be made the tool of other men's purposes, however worthy. And to him there is no purpose higher in the world as it now stands than the good of Gondor; and the rule of Gondor, is mine and no other man's, unless the king should come again."

"Unless the king should come again?" said Gandalf. "Well, my lord Steward, it is your task to keep some kingdom still against that event, which few now look to see. In that task you shall have all the aid that you are pleased to ask for. But I will say this: the rule of no realm is mine, neither of Gondor, nor any other, great or small. But all worthy things that are in peril as the world now stands, those are my care. And for my part, I shall not wholly fail of my task, though Gondor should perish, if anything else passes through this night that can still grow fair or bear fruit and flower again in days to come. For I am a steward. Did you not know?"


return of the king, chapter 1


Notice that Gandalf doesn't tell Denethor he's wrong. Not in so many words. He grants that Gondor is a key player, and that the steward is important. Yet he offers a counter-story to Denethor's. The Steward claims exclusivity because without the exclusivity he has no reason to demand what he does of his people. Either he must appeal to a higher authority or he must be that authority. And as we see later, his pride cannot stand the return of the king. Gandalf tells him, quite plainly, that while Denethor must steward Gondor, Gandalf is too a steward, and over a greater charge. Gandalf is responsible for this world. 


Like Gandalf, Christians offered to Rome a story that subsumed their own. Rome claimed exclusive rights to civilization: they were the only source of peace. Christians chuckled and said sure, but only because our Prince of Peace lets you stay there. 


In an interesting twist, Rome when the Christians show up is very much like Gondor when Gandalf shows up. Threatened by a great power in the east (Parthia, one of the only nations to ever defeat a Roman Emperor in battle), they are faced with mounted men from the east (the famed Parthian archers), wild men from the north (the Germanic tribes), and corsairs from the south (there were already pirates basing themselves in the Tunisia). The salvation of Rome, eventually, would come in the form of royalty from the north: Charles Martel's Frankish armies. So all that to say, weird. Or, because it's Tolkein, wyrd.