Mental Models Library

The Latticework of Mental Models

Why you need 100+ models from multiple disciplines, and what happens when you only have one hammer.

First Principles Thinking

Strip problems to bedrock truths rather than inherited assumptions. Reason from the ground up, not from the crowd down.

Inversion

Think backwards to see clearly forwards. "All I want to know is where I'm going to die, so I'll never go there."

Second-Order Thinking

Think past the first step — and then past the second. Most people stop at the obvious. Munger thinks downstream.

Circle of Competence

The edge of your knowledge matters more than the size. Knowing where you don't know is the foundation of sound judgment.

Margin of Safety

Never build a bridge rated exactly for the load you plan to carry. The gap between expected and capacity is where survival lives.

Opportunity Cost Thinking

Every decision has a shadow — the best alternative you didn't take. The real cost is invisible on any invoice.

The Lollapalooza Effect

When multiple forces converge simultaneously, they don't add — they multiply. Crashes, manias, and breakthroughs share this signature.

The Map Is Not the Territory

The danger is not using a model — you need one to navigate. The danger is forgetting it is a model, and mistaking it for the actual territory.

Occam's Razor

The simplest explanation that fits the facts is usually correct. Prefer simplicity; demand evidence before adding complexity.

Reward & Punishment Superresponse

"Show me the incentive and I'll show you the outcome." Humans respond to incentives disproportionately — the prefix super is the whole point.

Liking / Loving Tendency

The brain distorts reality in favour of what we love — ignoring faults, enabling wishes, and becoming blind to contradicting facts.

Disliking / Hating Tendency

The mirror of liking — hatred suppresses favourable facts, magnifies flaws, and causes reflexive rejection of good ideas from disliked sources.

Doubt-Avoidance Tendency

The brain is wired to eliminate uncertainty quickly rather than accurately. Discomfort with "I don't know" drives premature closure.

Inconsistency-Avoidance Tendency

The brain guards its prior conclusions like a fortress. Updating is experienced as threat, not growth — people become prisoners of their conclusions.

Curiosity Tendency

The rare person who never suppresses "why?" accumulates a lattice of models that turns curiosity into compounding advantage.

Kantian Fairness Tendency

Humans will reject unfair offers even at personal cost, and extend extraordinary cooperation when treated fairly. The tendency cuts both ways.

Envy & Jealousy

The zero-sum poison. Unlike greed, envy offers no compensating upside — it only makes you miserable, and sometimes ruins you in the process.