Definition
Fragility is the property of a system to suffer disproportionate harm from stressors, volatility, and disorder.
Why It Matters
It predicts system failure under stress, requiring fragile nodes to be shielded or restructured.
Core Concepts
- The Triad:
- Fragile: Dislikes disorder (e.g., a glass vase).
- Robust: Resilient to disorder but does not improve (e.g., a steel beam).
- Antifragile: Loves disorder (e.g., the immune system, muscles).
- Convexity: Antifragile systems have a “convex” response to stressors—the potential gains from disorder are greater than the potential losses.
- Over-optimization: Highly optimized systems (just-in-time supply chains) often become fragile because they have no “slack” to handle unexpected shocks.
- Optionality: Having many small bets with limited downside and unlimited upside is the primary way to build antifragility.