Machiavellian Intelligence Hypothesis
Updated 2026-08-02
INTRODUCTION
English translation pending.
CORE DEFINITION
The Machiavellian intelligence hypothesis, also called the social brain hypothesis, holds that primate intelligence evolved largely to handle social complexity: forming coalitions, deceiving others, and detecting deception. The claim is supported by correlations between neocortex size and measures of social complexity across primate species. Key qualification: social pressure is one important driver rather than the sole one, since ecological demands such as foraging and tool use also shaped cognition.
SCAFFOLDING EFFECT
Reduce cognitive load
- Revalue social skill: treat coalition building and reading intentions as core intelligence rather than as office politics. - Design for complexity: expect strong cognitive demands wherever many parties can defect or deceive. - Check the species fit: compare social complexity with brain measures when evaluating evolutionary claims.
Anchor fast decisions
In a social group, an individual's payoff depends on what others do, and others can conceal their intentions. Predicting their moves requires modeling their beliefs and tracking their reputations, and each new layer of deception creates pressure for a matching detection ability. This escalating arms race favors larger brains in species with the most complex social lives.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Machiavellian_intelligence_hypothesisverified
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