Zinn: This is absolutely established in the books. Pipe-weed is something all the Hobbits abuse. Gandalf is smoking it constantly. You are correct when you point out that Middle Earth depends on pipe-weed in some crucial sense, but I think you may be overstating its importance. Clearly the war is not based only on the Shire's pipe-weed. Rohan and Gondor's unceasing hunger for war is a larger culprit, I would say.
edit: page 2!
edit: page 2!
Zinn: I mean, look at how the Elves greet people — with arrows. Is that so different from the Orcs?
Chomsky: Right. And they're supposed to be nature-worshippers. It's sort of sickening and very bourgeois.