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Legends February 17, 2026 Wisdom Series @ eCalcy 13 min read

Charlie Munger: Wisdom, Mental Models & Latticework

Beyond finance: Explore the mental models that Charlie Munger used to build Berkshire Hathaway and live a rational life.

Charlie Munger: Wisdom, Mental Models & Latticework

Charlie Munger was the 'architect' behind Berkshire Hathaway's modern strategy. He convinced Buffett to stop buying "fair businesses at a wonderful price" and instead buy "wonderful businesses at a fair price."

The Latticework of Mental Models

Munger believed in "wordly wisdom"—using ideas from physics, biology, psychology, and history to make better financial decisions. He called this a Latticework of Mental Models. By understanding how the world actually works, you avoid being the "man with a hammer" to whom every problem looks like a nail.

Invert, Always Invert

Munger's favorite problem-solving technique was inversion. Instead of asking "How can I get rich?", ask "What will make me poor?" and then avoid those things (drugs, bad associates, over-leverage). By avoiding stupidity, you eventually reach success.

Put this into practice

Start planning your legends with our free Rational Goals Tool.