Antifragile

Overview

Nassim Nicholas Taleb (2012) identified a third response to stress beyond fragile/robust: antifragile — systems that gain from disorder, with bounded downside and unbounded upside.

• Fragile: concave — absorbs small stress, breaks catastrophically at the tail. (Over-leveraged banks, just-in-time supply chains.)
• Robust: linear — unchanged by stress. (Physical infrastructure, traditional skills.)
• Antifragile: convex — improves under stress. (Evolution, the immune system, the restaurant industry as a whole.)

Core warning: most modern complex systems are hidden-fragile — stable only because the tail event hasn't arrived yet. Composes with inversion, black-swan, expected-value-and-kelly, feedback-loops.

When to Use