Insurance

A mechanism for transferring risk from an individual to a pool in exchange for a premium. Insurance works because of the law of large numbers: while individual outcomes are unpredictable, aggregate outcomes across many policyholders are highly predictable. This allows the insurer to price risk accurately at the pool level. Beyond financial insurance, the principle applies broadly: any arrangement where you pay a small, certain cost to avoid a large, uncertain loss is insurance logic.

When to use it

When evaluating any risk that is low-probability but high-impact (catastrophic); when designing business continuity plans; when deciding between self-insuring and purchasing insurance; when the cost of a rare event would be disproportionate to its probability (ruin risk).

How it can help

Think of insurance not just as policies you buy but as a design principle for risk management. Emergency funds are self-insurance. Diversified revenue streams are business insurance. Redundant systems are operational insurance. The core question: where in your life or business would a low-probability, high-impact event be devastating? Those are the risks to insure against, whether through formal insurance or structural redundancy.