" According to Yale professor Richard Foster, in the 1920s the average life span of an S&P 500 company was sixty-seven years.14 Not anymore. Today the final three Ds in our chain reaction can disassemble companies and disrupt industries almost overnight, reducing the average life span of a twenty-first-century S&P 500 company to only fifteen years. Ten years from now, according to research done at the Babson School of Business, more than 40 percent of today’s top companies will no longer exist.15 “By 2020,” comments Foster, “more than three quarters of the S&P 500 will be companies that we have not heard of yet. "

― Peter H. Diamandis , Bold: How to Go Big, Create Wealth and Impact the World