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Relating size and functionality in human social networks through complexity.

B J West1, G F Massari2, G Culbreth2

  • 1Office of the Director, Army Research Office, Research Triangle Park, NC 27709; brucejwest213@gmail.com.

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Summary
This summary is machine-generated.

The Dunbar number, a limit on stable social relationships, arises from natural phase transitions in social systems. Network complexity peaks around 150, offering a theoretical basis for this social limit.

Keywords:
Dunbar numberallometry relationcomplexityfunctionality/sizenetwork calculations

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Area of Science:

  • Social network analysis
  • Complex systems theory
  • Evolutionary psychology

Background:

  • Empirical research suggests a cognitive limit to the number of stable social relationships an individual can maintain, known as the Dunbar number.
  • The Dunbar number, typically around 150, has been observed across various human societies and primate groups.

Purpose of the Study:

  • To propose a theoretical framework explaining the origin of the Dunbar number.
  • To investigate the relationship between social network complexity and collective intelligence.
  • To provide a computational basis for the observed value of the Dunbar number.

Main Methods:

  • Modeling social systems as dynamic self-organizing systems exhibiting natural phase transitions.
  • Analyzing the size dependence of scaling properties in complex social network models.
  • Direct calculation of social network complexity using scaling behavior metrics.

Main Results:

  • Social network complexity exhibits nonmonotonic behavior, peaking at approximately 150 individuals.
  • This peak in complexity suggests an enhanced form of collective intelligence within social systems.
  • The findings provide a theoretical explanation for the Dunbar number based on network dynamics.

Conclusions:

  • The Dunbar number can be explained as a consequence of phase transitions in self-organizing social systems.
  • Social network complexity and collective intelligence are intrinsically linked.
  • This study bridges sociological and psychological perspectives on social group size limits.