Tolkien was a literature professor before deconstruction defined an entire generation worth of philosophy and theory. In Tolkien's era, what the author intended was paramount; see movements like modernism where authorial intent is the important aspect of the work in question, and where the reader is supposed to pick their way through the work in order to decipher all that is being said.
We live in a post-post-modern world though, so things are different now. For what its worth too, people are right to call me out for saying that what Tolkien said was meaningless. That was shallow by me, and fueled by being too tired to give my post the amount of detail and nuance it deserved. That being said, again, while Tolkien did not intend to write an allegory, and while the Lord of the Rings is NOT an allegory, it can be read through an allegorical lens, that reading would be valid, and that reading would be worth discussing, because it would reflect certain inherit biases of Tolkien, as well as the culture that he grew up and lived in.
So yes, LotR is not an allegory, but an allegorical reading of it is not only valid, but a pretty easy reading to make.
I think I've derailed the thread though, so I won't go on more about it, or address the insulting points some people like to keep throwing out.