Building a Latticework: Borrowing Models from Every Field
Concrete examples of the specific models Munger borrowed from physics, biology, and economics — and applied directly to business and investing.
Munger is specific, not just abstract, about which models he considers most broadly useful — critical mass from physics, natural selection and ecosystem competition from biology, compound interest and opportunity cost from economics, and redundancy and backup systems from engineering are all examples he returns to repeatedly, each borrowed wholesale from its origin field and applied directly to business and investment problems.
The specific technique isn't memorizing a long list of named models — it's genuinely understanding the underlying logic well enough to recognize the same pattern showing up in an unrelated context. A person who understands biological competition for scarce resources has a real, applicable model for how businesses compete for customers in a saturated market, even though nothing about the biology was originally about business at all.
| Model | Origin discipline | Business/investing application |
|---|---|---|
| Critical mass | Physics | Why some businesses need to reach real scale before a strategy becomes viable at all, not just gradually better |
| Natural selection / competitive exclusion | Biology | Why businesses without a durable competitive advantage tend to get out-competed over time, however good they look in a single snapshot |
| Compound interest | Economics / mathematics | Why time horizon and consistency, not just annual return, drive long-run investment outcomes |
| Redundancy / backup systems | Engineering | Why a business (or a portfolio) with no margin for error is fragile, regardless of how well its base-case plan looks |
The specific value of borrowing a model from an unrelated field, in Munger's account, is that the model arrives without the blind spots specific to finance or business thinking — an idea like critical mass was developed and stress-tested entirely outside any business context, so applying it to a business problem brings a genuinely independent check, rather than more of the same reasoning already embedded in conventional financial analysis.
- Munger names specific, borrowed models from physics, biology, economics, and engineering that he applied directly and repeatedly to business and investing problems.
- The technique is genuine understanding of a model's underlying logic, not memorization of a list — enough to recognize the same pattern appearing in an unrelated context.
- Borrowed models are valuable specifically because they weren't developed with business's own blind spots baked in, providing a genuinely independent check on conventional financial reasoning.