According to the theory of Hubbert's Peak Oil prediction the world's oil supply will peak in the early new millenia and decline slowly over the years leaving us to fend for our selves in a post modern energy scramble.  What is interesting is the consequences this would bring was predicted in the 1970s.. See, Mad Max..  Was he pissed?  Yes.. But more so about his murdered family than the dwindling supply of petroleum in conflict. As the movie progresses you meet Max, a member of some kind of enforcement organization.  In the 70s this movie may have made more sense.. Everything being driven in this post apocalyptic oil-less world sucks gas like there is no tommorrow.  The first very humorous bit I saw was this guy rolling around like a bat-out-of-hell in some kind of V8 or possible V10 car that had to have had atleast 4 carberators..  He comes....