Another thing to add
Essex, I think another thing to add to your list, of how Tom Bombadil was important. He helped (along with Farmer Maggot who was said to have actually talked to Tom Bombadil) the hobbits see that the world is much bigger then the Shire. Also showed them, their were inhabitants in the Shire before hobbits existance and there will be hobbits after all the hobbits are gone. He gave the hobbits some history and showed them they aren't the only "inhabitants" in the world, the world is much bigger then their little shire. I think PJ should have included the bit with Maggot or either Tom Bombadil, since both give The Hobbits a good lesson.
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