[The Silver-shod Muse]

Sorry if I've offended any creationists by applying theory of evolution here: I have no wish to offend, and apologise if I have upset anyone...

Not at all! It would be ridiculous to flame someone who thinks differently in a discussion like this. I'm sorry that there's the need to apologize at all.

First off, I disagee with your idea on two points:

1 - I don't think what you're talking about is evolution (at least not the evolution I know from years of propagated science textbooks) because we are given no indication that any changes were made from the original form of elven physiology or brain mass. The very existence of elves flies in the face of evolutionary processes. Even if there was evolution, we can't be sure that there were enough generations among the long-lived elves to give rise to major changes like that. Remember that for mortals, the rate of evolution would be measured in time, but for immortals the number of generations is what matters.

Elves cannot be shown to claim kinship with apes, jellyfish or mushrooms any more than Tolkien's men can be. We know that they were created as the first and second born directly from Iluvatar's theme, and unless Cuivenen was a boiling primordial soup from which celestial beings crawled out as half-fish, evolution is not applicable to this.

2 - One can't overlay outside laws/theories to the laws that already govern Middle Earth because ours don't apply with any consistency there, and are therefore no longer laws. Theories are even less compatible because they're one community's idea applied to another man's world. Evolution has yet to be solidly proven on our side of reality, much less in Middle Earth.