Vice chairman of Berkshire Hathaway, author of Poor Charlie's Almanack
Decision Making
Instead of asking how to succeed, ask what would guarantee failure, then refuse to do those things. The failure list is the one you can actually write.
Munger uses the 'inversion' principle to teach how to avoid a miserable life. He identifies core traps such as substance abuse, envy, and resentment as factors that guarantee unhappiness.
Charlie Munger
builds defensively: understand failure through inversion, eliminate ignorance through the circle of competence, survive surprise through a margin of safety.
takes the other side for company builders. A bad plan is better than no plan, and definite optimism with a concrete vision is what produces transformative outcomes, because iteration without a bold plan will not take you from zero to one.
From Inversion
Latticework of Mental Models
Build a comprehensive mental toolkit by mastering the big ideas from all major academic disciplines -- psychology, economics, mathematics, physics, biology, engineering,…
A Lesson on Elementary, Worldly Wisdom (USC Speech, 1994) / Poor Charlie's Almanack
Circle of Competence
Know exactly what you understand deeply and what you do not. Operate primarily within the boundaries of your genuine expertise where you have an edge. The size of your…
Poor Charlie's Almanack / Berkshire Hathaway Shareholder Meetings / A Lesson on Elementary, Worldly Wisdom (USC Speech, 1994)
Two-Track Analysis
Evaluate every decision through two independent tracks simultaneously. Track 1: What are the rational factors -- the real interests, probabilities, and economics? Track…
Poor Charlie's Almanack / The Psychology of Human Misjudgment
You need roughly 80 to 90 important mental models to carry about 90% of the freight in making you a worldly-wise person.
When building your intellectual toolkit for decision-making across all domains
A Lesson on Elementary, Worldly Wisdom (USC Speech, 1994)
Any time anybody offers you anything with a big commission and a 200-page prospectus, don't buy it.
When evaluating financial products or investment vehicles with complex fee structures
A Lesson on Elementary, Worldly Wisdom (USC Speech, 1994)
It is far better to buy a wonderful company at a fair price than a fair company at a wonderful price.
When choosing between statistically cheap mediocre businesses and quality businesses at reasonable valuations
Poor Charlie's Almanack / Berkshire Hathaway Shareholder Meetings
If you find yourself needing a spreadsheet with dozens of assumptions to evaluate an investment, it probably belongs in the Too Hard Pile.
When evaluating the complexity of an investment or business decision
Poor Charlie's Almanack / Berkshire Hathaway Shareholder Meetings
If someone's behavior seems irrational, look at the incentive structure first -- you will almost always find the explanation there.
When diagnosing seemingly irrational behavior in individuals, organizations, or markets
The Psychology of Human Misjudgment (Harvard Speech, 1995)
If multiple cognitive biases are pushing in the same direction, expect an extreme outcome (Lollapalooza) and be extra cautious.
When analyzing situations with extreme crowd behavior, market bubbles, or cult-like dynamics
The Psychology of Human Misjudgment (Harvard Speech, 1995) / Poor Charlie's Almanack
The goal is not to be brilliant but to be consistently not stupid -- systematically avoid errors rather than trying to be a genius.
Munger observed that most catastrophic outcomes come from avoidable errors rather than from insufficient brilliance. A defensive system built on error avoidance (through…
Poor Charlie's Almanack / Berkshire Hathaway Shareholder Meetings
Lifelong learning is not optional -- it is the foundation of all worldly wisdom and competitive advantage.
Munger believed that the world is constantly changing, circles of competence can shrink, and new models become relevant. The only defense is relentless reading and…
Multidisciplinary thinking is essential because real-world problems do not respect academic department boundaries.
Munger argued that the 'fatal unconnectedness of academic disciplines' (borrowing Alfred North Whitehead's phrase) left specialists blind to factors outside their narrow…
A Lesson on Elementary, Worldly Wisdom (USC Speech, 1994) / Poor Charlie's Almanack
