Mental Models

“Mental models” is the central organizing idea of Charlie Munger’s worldly-wisdom project. In Charlie Munger — A Lesson on Elementary Worldly Wisdom, Revisited, Munger argues that the system “which almost any intelligent person can learn” and which “works way better than the systems that most people use” is to build “a latticework of mental models in your head” and to “hang your actual experience and your vicarious experience (that you get from reading and so forth) on this latticework of powerful models.” With that system, “things gradually get to fit together in a way that enhances cognition.” The models must come from across disciplines — Munger insists you “ignore jurisdictional boundaries” and carry “the main models from a broad array of disciplines” — which is why mental models are inseparable from Multidisciplinary Thinking and the Latticework concept. Psychology is one of the disciplines Munger treats as most powerful and most often ignored.

In Charlie Munger — The Psychology of Human Misjudgment the same frame supplies the mechanism for why isolated knowledge fails: Munger says he “was not going to cope as well as I wished with life unless I could acquire a better theory-structure on which to hang my observations and experiences.” Gaps in that latticework of models drive the “man with a hammer” error, so a wise man keeps practicing rarely used skills outside his own discipline to avoid creating them. Mental models also surface in Kyle’s saved tweets — the George Mack tweet on Josh Waitzkin frames Waitzkin’s distilled lessons as “mental models” in the same Munger-style cross-disciplinary sense.

Context: The latticework-of-mental-models framing is most associated with Munger’s 1994 USC Business School talk “A Lesson on Elementary, Worldly Wisdom,” collected in Poor Charlie’s Almanack. It has since been popularized further by writers such as Shane Parrish (Farnam Street), whose mental-models books Kyle references in his reading notes.

Where this appears

• Charlie Munger — A Lesson on Elementary Worldly Wisdom, Revisited — the source of the “latticework of mental models” formulation and the call to ignore jurisdictional boundaries.
• Charlie Munger — The Psychology of Human Misjudgment — mental models as the “theory-structure” that prevents “man with a hammer” error.
• Latticework — the framework metaphor on which the models are arrayed.
• Psychology — one of the core disciplines Munger’s model-set draws on.
• Josh Waitzkin Might Be The… (tweet) — George Mack compiling Josh Waitzkin’s lessons as “mental models.”