Others believe, like Maugeri, that the number of glasses is virtually limitless. John Felmy, chief economist at the American Petroleum Institute, argues that peak oil-production estimates are so far off that for all practical purposes we might as well act as if oil will flow forever. "Ever since oil was first harvested in the 1800s, people have said we'd run out of the stuff," Felmy says. In the 1880s a Standard Oil executive sold off shares in the company out of fear that its reserves were close to drying up. The Club of Rome, a nonprofit global think tank, said in the 1970s that we'd hit peak oil in 2003. It didn't happen.