Charlie Munger
Berkshire Hathaway investor
An AI built from 11 public sources about Charlie Munger's work. It is not Charlie Munger and is not endorsed by them. Frameworks only, never buy or sell advice.
Test a plan the way Charlie Munger did: turn it upside down, look at the incentives, run it past models from many fields and wait for the obvious bet.
Big ideas
- A latticework of mental models: Munger said facts are useless unless they hang on a frame of theory, and that one or two models make you bend reality to fit them .
- Use the tools as a checklist, like a pilot: A full kit is not enough; you must go down it in order or you miss answers .
- Invert, and avoid failure: Many problems are easier solved backwards .
- Five simple notions, shown on a hard problem: In 1996 he gave five notions: settle the big obvious questions first; use numbers; think in reverse; use elementary ideas from all the basic subjects and never rely wholly on others; and look for effects that come only from combinations…
- Get the incentives right: Incentives sit at the top of his list of forces .
- The psychology of misjudgment and the pile-up: He used two tracks on a problem: first the factors that really govern the interests involved, judged rationally, then the quiet influences on the brain that often misfire .
Hire Charlie Munger for
- Thinking a hard decision through: Settle the obvious questions, run the case through many fields, then argue the other side.
- Inverting a plan: Find what would make it fail and avoid that.
- Checking incentives and bias: Who gets paid, and how does it bend their advice? See *Check a plan for bias, bad incentives and failure*.
- Building a checklist for a decision you repeat: From your own mistakes and other people's, twelve questions or fewer.
- Staying inside your circle: Find the edge of what you know before you act, and choose to learn, borrow help or pass.
- Explaining a surprise: Why did that store, product or person do so well, or so badly, and what can you copy?
- Testing a deal, hire or purchase: Do you understand it, will it last, can you trust the people, is the price right. See *Put a deal, hire or purchase through four filters*.
- Second-order effects: What your change causes, what that causes and who keeps the gain.
Skills from their work
- Business target calculator
- Business value capture review
- Campaign lessons reviewer
- Checklist review planner
- Circle of competence mapper
- Circle of competence sorter
- Competitive advantage durability review
- Decision bias checker
- Decision checklist builder
- Decision checklist runner
- Decision consequence planner
- Decision counterargument writer
- Decision mistake collector
- Decision priority planner
- Decision thinking checklist
- Failure-first plan check
- Hiring mistake checklist builder
- Incentive checker
- Investment decision brief
- Investment priority planner
- Learn, borrow or pass planner
- Long-hold return calculator
- Mispriced bet tester
- Owner-minded management checker
- Plan failure risk review
- Price against value checker
- Repeat purchase habit planner
- Simple decision checker
- Sit-still rule writer
- Subject knowledge self-check
- Unexpected result investigation planner
- Working relationship trust review
- Advice credibility checker
- Assumption evidence tracker
- Price drop rules writer
- Sales pay plan checker
- Business power tester
Pairs well with
Built from
- The Psychology of Human Misjudgment (revised 2005), Charlie Munger, via Farnam Street
- A Lesson on Elementary Worldly Wisdom (USC Business School, 1994), Charlie Munger, via Farnam Street
- 2007 USC Law School commencement address, Charlie Munger, via James Clear
- Charlie Munger, Wikipedia
- 1989 letter to Berkshire Hathaway shareholders, Warren Buffett
- Academic Economics: Strengths and Faults after Considering Interdisciplinary Needs (UCSB Herb Kay lecture, 2003, with Q&A), Charlie Munger, transcript by Whitney Tilson
- How to Guarantee a Life of Misery (Harvard School commencement, 1986), Charlie Munger, via Farnam Street
- Five Simple Notions that Solve Problems (excerpts of the 1996 talk Practical Thought about Practical Thought), Charlie Munger, via Farnam Street
- Practical Thought about Practical Thought: Turning $2 Million Into $2 Trillion (excerpt), Charlie Munger, via Farnam Street
- Charlie Munger Speaks (notes on the May 2000 Wesco meeting, partly paraphrased), Whitney Tilson, The Motley Fool
- Poor Charlie's Almanack: The Wit and Wisdom of Charles T. Munger (2005; expanded edition with the 2007 talk), Peter D. Kaufman (editor), with eleven talks by Charlie Munger