Charlie Munger on mental models
Munger argues that sound judgment requires a latticework of big ideas drawn from every major discipline, plus a self-built checklist of the standard psychological misjudgments, used routinely rather than recited. He pairs that breadth with simplicity — Occam's razor, organized common sense, being roughly right rather than precisely wrong — and with habits like hunting for disconfirming evidence, and he treats this lifelong wisdom acquisition as a moral duty.
14 points · 7 appearances · 1995–2020
How the view evolved
Built his own misjudgment checklist → Big ideas beat narrow expertise
In 1995 the psychology model set is presented as a homemade fix — Munger recounts jury-rigging 'my own system of psychology' because Harvard left him ignorant and the textbooks had holes. By 2020 at Caltech it has hardened into settled infrastructure — 'that's just my system' — used routinely in judgments, with the indignation at academia mellowed into a wry diagnosis of over-specialization.
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1995–2023 · changed view
“But of course, when people use the word common sense, what they mean is uncommon sense, because the standard human condition is ignorance and stupidity. They say old Joe has common sense, they mean as he has uncommon sense, I guess.”
2008–2023 · changed view
“If you get right down to it, what I am is a lover of the progress of civilization. That turns me on.”
2007–2023 · changed view
“Well I think it's very useful to get the capitalist perspective, namely how do you make this thing work for the people that own it, because the reality will make more sense when you go at it with that perspective. So even if you don't intend to get rich, you want that perspective, because you'll understand the reality you're dealing with better. So I think you mentally want to make yourself an investor as part of the proper training of your mind. And since you have to do it anyway to improve your mind, you may as well get rich while you're doing it. And so if you underspend your income while you're life and keep learning and collect all the bonehead experience mistakes other people made and avoid them and so on, I would confidently predict that you'll do just fine.”
2007–2023 · changed view
“What are the core ideas that have helped me? Well, luckily I got at a very early age the idea that the safest way to try and get what you want is to try and deserve what you want. It's such a simple idea. It's the golden rule, so to speak. You want to deliver to the world what you would buy if you were on the other end. There is no ethos in my opinion that is better for any lawyer or any other person to have. By and large the people who had this ethos win in life, and they don't win just money, just honors and emoluments. They win the respect, the deserved trust of the people they deal with. And there is huge pleasure in life to be obtained from getting deserved trust. And so, and the way to get it is to deliver what you'd want to buy if the circumstances were reversed.”