LOL, this is like picking the player of the game at halftime, hard to know who was the Doomer and who the Corny before decline sets in.
Maybe Bardi and Collapsnik are the Cornies? Or maybe Yergin is the Doomer?
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I think the most mistaken predictions on either side are about "Ability to Pay".
Overnight Armageddonists say the price could go to some astronomical level overnight and stay there, causing collapse. Unicorn Worshipers actually make the same mistake, believing supply will always rise even as the increasing difficulty of production continuously raises prices, causing utopia. There are variations, doomers think substitution, conservation are bad while Cornies see them only as good, etc.
But what both ignore is that [ability to pay] is not unlimited and in fact is dependant on the built infrastructure of easy oil. The price/utility ratio isn't unlimited so it can neither collapse the economy overnight nor continue fossil fuel utopia forever.
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In fact, my *prediction that the price would not continue to rise but increasingly fluctuate while averaging less has been a pretty good guess so far if I do say so myself... *(it actually started out as just a devil's advocate argument to drum up some posts but hey, LOL)

The legitimate object of government, is to do for a community of people, whatever they need to have done, but can not do, at all, or can not, so well do, for themselves -- in their separate, and individual capacities.
-- Abraham Lincoln, Fragment on Government (July 1, 1854)