The United States is perhaps the most vulnerable to the coming crisis having farther to fall after the boom years, which themselves were largely driven by foreign debt and inward investment. The growing shortfall in oil supply since its own peak of production was made good by soaring oil imports, now contributing more than half its needs, and a move to gas. The rate of import cannot, however, be maintained as other countries pass their own production peaks, putting ever more pressure on the Middle East. For every barrel imported into the United States, there will be one less left for anyone else, a situation inevitably leading to international tensions. The move to gas proved to be only a short-lived palliative.
Gas depletes differently from oil.
An uncontrolled gas well would blow it all away in one big puff. Production is, accordingly, capped by infrastructure and market, leaving a large, unseen balloon of readily available spare capacity. In a privatized market, trading on a daily basis, production becomes cheaper and cheaper as the original costs are written off and as this almost free spare capacity is drawn down. There were no market signals of the approach of the cliff at the end of the plateau. It accordingly came without warning, causing prices to surge through the roof, and bringing power blackouts to California.