The world is moving so fast nowadays that the man who says it can’t be done is generally interrupted by someone doing it.

—attributed to Elbert Hubbard

Peter Drucker once said, “Every organization … has a theory of the business … Some theories of the business are so powerful that they last for a long time. But … they don’t last forever, and, indeed, today they rarely last for very long at all. Eventually every theory of the business becomes obsolete and then invalid.”1 Indeed, the average life span of those theories grows shorter every day. Building a great business and operating it well no longer guarantees you’ll be around in a hundred years, or even twenty. In 1965, the average length of time a company remained on the S&P 500 was ...

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