Lesley Stahl, famed "60 Minutes" investigative journalist, was in Silicon Valley recently where tech companies, she says, are actually in the business of “disrupting.” “They are searching for ways to upend existing sectors of the economy. ‘Creative destruction’ they call it,” Stahl says. Economist Joseph Schumpeter coined the term in the middle of the last century. “He said it was an essential engine of economic progress and central to capitalism. New technologies would destroy old businesses and new jobs would be created. The automobile put 238,000 blacksmiths out of business. It created even more workers in Detroit making cars.