Quote:
Originally Posted by Morthoron
Tolkien does not provide enough information. From an historical perspective, lands are conquered so that natural resources can be exploited: whether that means fertile land to feed an expanding population; the availability of rich lodes of precious metal, iron ore or coal; some other tangible and tradeable goods (like rare spices, as someone mentioned); or sometimes the people of a certain region are exploitable goods for the slave trade.
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Or simply because it was the sort of thing kings felt they were expected to do. If they were good at it, they got nifty epithets like "the Great" or "the Conqueror."
(If you don't believe me, look at all the blood and treasure that centuries' worth of Persian and Roman emperors poured into taking Armenia off one another- despite the fact that there's not a damn thing there worth 'exploiting')