What Is Iatrogenics? Definition and Examples

Iatrogenics comes from the Greek iatros (healer) and genesis (created). It means harm caused by the healer's interventions. Medical iatrogenics: a drug's side effects cause more harm than the disease would have. Policy iatrogenics: a government intervention creates worse problems than it solved.

Hippocrates stated the principle 2,400 years ago: primum non nocere — "first, do no harm." Yet medicine, policy, and intervention generally violate this principle systematically.

Why Iatrogenics Occurs

The structural problem: benefits of intervention are visible and immediate; harms are invisible and delayed.

A doctor prescribes antibiotics. The patient feels better (visible benefit). The antibiotic contributes to resistance development (invisible harm, delayed by years).

A central bank cuts interest rates. Markets stabilize (visible benefit). This encourages excessive risk-taking that will cause a crash later (invisible harm, delayed by years).

This asymmetry creates systematic bias toward intervention.

Taleb's Two Principles

First Principle (Empiricism): The burden of proof falls on the intervention, not on skeptics. Nature has billions of years of track record. A new drug has months. Default to nature unless overwhelming evidence of safety.

Second Principle (Nonlinearity): Treat severe illness aggressively (large benefits justify large risks). Leave mild illness alone (small benefits don't justify equivalent risks). Modern medicine often reverses this.

Extended Iatrogenics

The principle extends beyond medicine:

Economic policy: Smoothing business cycles prevents small recessions but creates large financial crises.

Parenting: Eliminating all difficulty prevents development of resilience.

Education: Standardizing curriculum removes curiosity-driven learning.

Urban planning: Eliminating street life creates lifeless cities.

Go deeper:

For the full breakdown of iatrogenics and how to avoid it, read Iatrogenics: The Harm Done by Helpers.