Resilience Requires Damage
Break a bone and it heals stronger than before — the new bone tissue at the fracture site has a higher density of calcium deposits.
Your immune system can’t fight measles until it’s seen measles. Muscle fibres tear during exercise and rebuild thicker. The pattern is biological: living systems improve by surviving controlled damage.
Nassim Taleb calls this antifragility — systems that need stressors to improve. The difference isn’t semantic: resilient systems survive damage; antifragile systems improve because of it. A teacup is fragile. A rock is resilient. Your immune system is antifragile.
The key is sub-lethal stress — enough to trigger adaptation, not enough to overwhelm the system’s repair capacity. A fractured bone strengthens; a shattered one never heals the same way. Your immune system develops antibodies from exposure to weakened pathogens, not from infections that kill you. The margin between beneficial stress and destructive stress is what makes the principle useful.
Psychological resilience follows the same template. Post-traumatic growth is evidence that crisis-navigation skills can only be built under crisis conditions. The coping mechanisms you develop handling your first real loss become your foundation for the next. This learning requires exposure — you can’t train an immune system without pathogens.
Protect people from all stressors and you get fragility, not safety.