Until the late 17th century, Europeans believed all swans were white because they had never seen anything else. That changed when explorers discovered black swans in Australia, upending centuries of zoological “knowledge”. Statistician Nassim Taleb uses this to describe “Black Swan” events: occurrences that are unpredictable, have a massive impact, and are rationalized in retrospect.
While these events are shocking, this mental model teaches us to ignore them in our everyday strategy. Because a Black Swan is an anomalous outlier, it is not “the norm” and should not be used to rewrite your entire worldview. If you organize your life around the fear of a “random bolt from the blue,” you incur massive opportunity costs.
Human nature often falls for the gambler’s fallacy—trying to find a predictable pattern in random data. We also suffer from apophenia, the tendency to see connections where none exist. Smart planning requires understanding risk, but you shouldn’t live in a state of constant reformation because of a “one-off” disaster. Ask yourself: “Is this event likely to occur again? Can I reasonably do anything about it?”. If the answer is no, acknowledge the outlier and return to the reality of the “mean”.