Author Nassim Nicholas Taleb famously coined the term "Black Swan" in his 2001 book by the same title. The black swan theory is based on the theory that most major events in history -- the rise of the Internet, September 11, the personal computer -- do not come on us gradually, but rather in major, seismic shifts. If the event was unpredictable, created a huge impact and in hindsight, destined to happen, it fits the bill of a black swan.

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