MINDSETMonths to result

Warfare Theory

Evolved psychology of warfare

Problem it solves

limiting beliefs

Best for

Researchers and scholars in evolutionary psychology and human behavior

Not ideal for

General audience without background in evolutionary psychology

Overview

Why this framework exists

The theory of warfare developed by Tooby and Cosmides points to an often overlooked conclusion: warfare requires elaborate cooperation among members of one group to coordinate their aggressive actions against another group. The theory also proposes that sexual access to women would have been the key reproductive resource that selected for men to evolve a psychology of warfare.

Core principles

3 total
  1. Warfare requires cooperation among group members to achieve a common goal.
  2. Sexual access to women is a key reproductive resource that drives the evolution of warfare psychology in men.
  3. Men have evolved specific psychological mechanisms for warfare, which are triggered by certain circumstances.

Steps

3 steps
  1. Identify the triggers of warfare
    Triggers of warfare include access to mates, resources, and territory. Understanding these triggers is crucial to understanding the evolution of warfare psychology in men.
    Pro tipConsider the role of sexual selection in shaping the evolution of warfare psychology.
    WarningBe aware of the potential for misinterpretation of the theory, which may lead to oversimplification or misapplication.
  2. Analyze the role of cooperation in warfare
    Cooperation among group members is essential for successful warfare. Understanding the mechanisms of cooperation can provide insights into the evolution of warfare psychology.
    Pro tipConsider the role of kin selection and reciprocal altruism in shaping cooperation among group members.
    WarningBe aware of the potential for cooperation to break down in the face of conflicting interests or external threats.
  3. Evaluate the evidence for evolved homicide adaptations
    The evidence for evolved homicide adaptations includes comparative, paleontological, and cross-cultural data. Evaluating this evidence can provide insights into the evolution of warfare psychology.
    Pro tipConsider the role of homicide adaptations in shaping human behavior and the implications for understanding warfare psychology.
    WarningBe aware of the potential for misinterpretation of the evidence, which may lead to oversimplification or misapplication.

Checklist

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Examples

2 cases
The Viking raids

The Viking raids provide an example of how access to mates and resources can trigger warfare. The Viking men formed war parties to attack existing settlements, capturing wealth and women.

OutcomeThe Viking raids resulted in the capture of wealth and women, which provided a reproductive benefit to the Viking men.
The Age of the Vikings

The Age of the Vikings provides an example of how a surplus of men can lead to an increase in warfare. The Viking men engaged in warfare to gain access to mates and resources.

OutcomeThe Age of the Vikings resulted in the expansion of Viking territory and the capture of wealth and women.

Common mistakes

3 traps
Misinterpreting the theory
Misinterpreting the theory of warfare can lead to oversimplification or misapplication. It is essential to consider the complexity of the theory and the nuances of human behavior.
Ignoring the role of cooperation
Ignoring the role of cooperation in warfare can lead to a lack of understanding of the mechanisms that drive human behavior in conflict situations.
Overlooking the evidence
Overlooking the evidence for evolved homicide adaptations can lead to a lack of understanding of the evolution of warfare psychology and its implications for human behavior.

Origin story

How this framework came to be

The theory of warfare has its roots in evolutionary psychology and the study of human behavior. It suggests that men have evolved specific psychological mechanisms for warfare, which are triggered by certain circumstances such as access to mates and resources.

Source

Traced to primary
Source · BOOK
Evolutionary Psychology The New Science of the Mind
David M Buss · 2025
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