This may be old news to some people, especially the Russian speakers, but I didn't see an article about it here.
In 1999, Kirill Yeskov, a Russian paleontologist, wrote The Last Ringbearer, a 270-page take on Lord of the Rings from the point of view of a medic in Mordor's dying armies who is also a "skeptic and a rationalist." In fact, Mordor represents the forces of reason in this retelling of the story. As a Nazgúl (himself a former mathematician) explains, Mordor is "the little oasis of Reason in which your light-minded civilization had so comfortably nestled." Barad-dur is "that amazing city of alchemists and poets, mechanics and astronomers, philosophers and physicians, the heart of the only civilization in Middle-earth to bet on rational knowledge and bravely pitch its barely adolescent technology against ancient magic."
The story has been newly translated and is available in free PDF form -- in English and the original Russian. There's a recent review from Salon as well.
While it's true that Tolkien did set out to create a fictional world, I think that treating LotR like a historical documentfrom that fictional world is counter to both Tolkien's intent, and the spirit of the work. Tolkien did not write LotR to describe "facts" from some world; rather, he set out to create a mythology for that world. Thus, when you read any ot Tolkien's works, don't think of them as literal descriptions of things that actually occured in some fictional world where elves and wizards exist. Rather, understand it like you would a folk tale or mythic poem: of great cultural significance to the people that it came from, but not a literal account of something that happened.
This is actually sort of my point.