The Psychology of Human Misjudgment · 1995
Munger's “The Psychology of Human Misjudgment,” explained
Charlie Munger's field guide to the two dozen mental biases that wreck decisions — and how to build a checklist against your own brain.
Charlie Munger delivered versions of this talk through the 1990s, and it anchors his book Poor Charlie's Almanack. Its premise: most bad decisions aren't caused by a lack of intelligence but by predictable, systematic misfirings of human psychology.
A latticework of biases
Munger catalogs roughly 25 tendencies — among them incentive-caused bias, social proof, authority-misinfluence, commitment and consistency, and what he memorably called 'the lollapalooza effect,' where several biases stack in the same direction and produce extreme, often disastrous, outcomes.
“Never, ever, think about something else when you should be thinking about the power of incentives.”
How investors use it
The practical payoff is defensive. Munger's advice is to learn the biases well enough to recognize them in yourself and in the companies you analyze — then build routines and checklists that counteract them. Ask who is being incentivized, whether you're following the crowd, and whether you're clinging to a view simply because you already stated it.
- Incentives explain more behavior than intentions do — follow them.
- Biases compound; watch for several pushing the same way at once.
- The cure is a checklist, not willpower.
It pairs naturally with Robert Cialdini's Influence, which Munger repeatedly credits, and with Kahneman's work on fast-and-slow thinking.
This is an original explainer by Value Investors Club, not the essay itself. Read Charlie Munger's original ↗.
