Black Swan Events
Rare, high-impact events that are unpredictable beforehand but feel obvious in hindsight. Taleb divides the world into Mediocristan (where outcomes follow normal distributions and extremes are rare) and Extremistan (where single events can dominate everything — one book outsells all others, one crash wipes out decades of gains). The predictability illusion is our tendency to believe we can forecast these events when we can't. The practical response: don't try to predict Black Swans — position yourself to survive or benefit from them.
2 related concepts
Related ideas
Ideas connected to Black Swan Events.
Black Swans destroy the fragile and reward the antifragile — same event, opposite outcome
Narrative FallacyAfter a Black Swan, everyone constructs a story explaining why it was obvious — that's the narrative fallacy
Signal and NoiseBlack Swans hide in the noise — you can't separate them from randomness until they've already hit
Probabilistic ThinkingProbabilistic thinking is how you prepare for what you can't predict
Mean ReversionMean reversion works in Mediocristan; Black Swans break it in Extremistan