# The Great Mental Models [[Shane Parrish]]'s four-volume series (2019–2024) systematizing the [[Charlie Munger]] mental-models tradition for a general-audience curriculum. Co-written with Rhiannon Beaubien and published by Latticework Publishing (the imprint of Parrish's Farnam Street platform), the series treats mental models from particular disciplinary clusters in each volume: - **Volume 1** (2019): General Thinking Concepts (first principles, second-order thinking, inversion, Occam's razor, Hanlon's razor, circle of competence, map vs. territory, falsifiability, probabilistic thinking) - **Volume 2** (2020): Physics, Chemistry, and Biology (thermodynamics, evolution, ecosystems, equilibrium, leverage, replication) - **Volume 3** (2021): Systems and Mathematics (feedback loops, scale, emergence, Bayesian updating, regression to the mean, sampling) - **Volume 4** (2024): Economics and Art (incentives, opportunity cost, supply and demand, performance, perspective) The series is the most thorough modern systematization of the latticework approach for a non-finance, non-academic audience. Where [[Poor Charlies Almanack]] is an anthology and *[[Thinking Fast and Slow]]* is a synthesis, *The Great Mental Models* is a *curriculum* — designed to be worked through as a learning sequence. ## What the Books Actually Do ### Pedagogical Structure Each model in the series is treated through a consistent format: definition, illustrative example, domain of usefulness, common failure modes, connections to other models. This is the opposite of academic decision-science prose, which assumes specialist familiarity. Parrish's pedagogy makes the lattice approach learnable rather than merely admirable. Most readers can work through Volume 1 in a few days and emerge with a usable vocabulary. ### Curatorial Achievement The mental models in the series are drawn from disciplines whose primary literature would take years to master in any depth: thermodynamics, evolutionary biology, Bayesian statistics, economics, complex-systems theory. Parrish's contribution is curatorial — selecting from each discipline the small handful of models that generalize most usefully outside the discipline, presenting them with enough depth to be applied but without the technical apparatus that would make them inaccessible. ### The Lattice Itself Volume 1's framing argument: any single mental model, applied alone, will mislead most of the time. Decisions improve when *multiple* models from different disciplines are applied to the same situation. The series is structured to give readers the components for assembling their own lattices rather than handing them a finished framework. ## KB Significance **1. The accessible distribution vector.** The series is probably the single best entry point for non-specialist audiences who want to develop cognitive-defense literacy without working through the academic literature. For RWKB-relevant readers — political analysts, citizen activists, journalists, policy-aware professionals — the series provides the conceptual apparatus that makes the [[Decision Science]] hub of this vault navigable from inside the user's own thinking rather than only from the perspective of analyzing other people's manipulation. **2. The contrast with single-discipline ideological frameworks.** The series's central methodological argument — that any single discipline misleads when applied alone — is structurally protective against the monomaniacal reasoning that political movements cultivate. NRx, [[Christian Nationalism]], race essentialism, certain strands of effective altruism, and various other "everything explained by this one framework" projects are operating in the cognitive mode Parrish (following Munger) explicitly warns against. Reading the *Great [[Mental Models]]* series is, among other things, immunization against those frameworks. **3. The vocabulary the [[Decision Science]] subfolder uses.** Many entries in the Workhorse Heuristics subfolder of this vault are named and characterized in terms drawn from Volume 1 of *The Great Mental Models*. The vault's lay-decision-science vocabulary is, in significant part, the Parrish vocabulary. ## See Also - [[Shane Parrish]] — The author - [[Charlie Munger]] — The intellectual lineage the series popularizes - [[Poor Charlies Almanack]] — The Munger anthology Parrish builds on - [[Decision Science]] — The vault's index of mental-model concepts the series introduces - [[Decision Science]] — The hub where this work lives