The black swan theory is a metaphor that describes an event that comes as a surprise, has a major effect, and is often inappropriately rationalized after the fact with the benefit of hindsight. The theory was developed by Nassim Nicholas Taleb.

Thomas Cook. Look what I’ve created. I have made fire.
More than 600.000 vacationers were left stranded when the 178-year-old travel company, Thomas Cook, announced Monday, with some of its flights still in the air, […]