Sorry.  Could make it through the reference.  I've reached saturation on peak oil stuff like this.

Someone could get a PhD studying the combinatorial ways in which Tolkien has been interpreted.  He was a bright guy all right.  Bright enough to wrote a symbolic story that made it possible for people to interpret ad nauseum.  Now we've got a peak oil interpretion.  Yippee.

Tolkien set out to create a mythology, and one hallmark of mythological stories is that people far removed from the author's time, place, and culture can continue to find meaning  in them that relates to their own lives.