Iatrogenics (Harm from Treatment)

Medical harm caused by the treatment itself—when the cure is worse than the disease. Taleb extends this beyond medicine to any domain where intervention intended to help actually makes things worse: economic stimulus that creates bubbles, organizational restructuring that destroys institutional knowledge, therapy that retraumatizes, and policy interventions that create worse problems than they solve. The key insight: the burden of proof should be on the intervention, not on inaction, especially when the system is complex and the intervention's second-order effects are uncertain.

When to use it

When considering interventions in complex systems (organizations, markets, health); when the urge to 'do something' is strong but the second-order effects are unclear; when evaluating whether past interventions may have caused the current problem; when deciding between aggressive intervention and watchful waiting.

How it can help

Before any intervention—in business, health, or policy—ask: what's the probability and magnitude of iatrogenic harm? The risk of iatrogenics increases with system complexity, intervention aggressiveness, and uncertainty about second-order effects. Taleb's heuristic: for fragile systems, lean toward non-intervention unless the problem is severe and the intervention is well-understood. For antifragile systems, lean toward small interventions that allow the system to learn. The first rule of management (and medicine): first, do no harm.