Another theme that appears several times in The Lord of the Rings is the conflict between nature and industry. Tolkien had been raised in the countryside and was very attached to nature, so you could understand his disappointment with his fellow humans when industry and machines began taking over. Because of his childhood home, he made a noticeable connection between evil and metal by making the Shire a rural place and filling Mordor and Isengard (the antagonists) with machines, forges, fire, wheels, and other objects associated with manufac... Read more→
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Smeagol was not a Hobbit, he was one of the Fisher Folk, a race that are close to the Hobbits, and they lived in the Shire still, beside the river.
While, yes, it is correct to say Aragorn rules over two kingdoms of men (namely Gondor and Arnor), he does not and never does rule over Rohan. The land on which Rohan is located did previously belong to Gondor centuries ago but was gifted to the Rohirrim to claim as their own. Rohan is its own kingdom and no longer is subject to the rule of Gondor's King. Rohan and Gondor are still linked through their strong alliance or the Oath of Ceorl.