[Imladris]

I don't know much about the history of Middle-earth, but I do not some stuff about Tolkien (I have also read the first chapter of the Silmarillion). Tolkien was a Catholic, which meant he believed the Bible to a certain extent and the Bible tells that the world was created. So, just from that, I'd venture to say that he was a Catholic. He also had Illuvitar create the world through song and I don't recall anything about evolution, etc. in the little snippets I've heard/read about Middle-earth's history. But this is just my uneducated opinion.