Nassim Nicholas Taleb
Rather than merely resisting unpredictable shocks, certain systems, organisms, and portfolios are structured to grow stronger from stress, volatility, and disorder.
Many systems and entities can be understood through three categories: the fragile, which are harmed by volatility; the robust, which remain unchanged; and the antifragile, which possess a structural tendency to grow stronger under stress.
Under extreme conditions, the fragile suffer disproportionate, non-linear harm from large shocks, whereas the antifragile benefit from convex asymmetry where potential gains from volatility far exceed potential losses.
To safely harness uncertainty, the barbell strategy serves as a practical heuristic by combining extreme conservatism on one end to prevent ruin with small, highly speculative bets on the other to capture unlimited upside.