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Social structure shapes consensus decision-making norms in small-scale societies.

Bhavya Deepti Vadavalli1, Zachary H Garfield2, Luke Glowacki1

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Social structures like marriage and nested groups impact group consensus. While families can hinder information flow, larger subgroups and representative decision-making promote faster consensus.

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Area of Science:

  • Social network analysis
  • Collective intelligence
  • Human social evolution

Background:

  • Humans excel at societal consensus, but the mechanisms are unclear.
  • Social organization's constraints on consensus pathways need investigation.

Purpose of the Study:

  • To model how marriage structure, social group nesting, and decision-making norms influence consensus.
  • To understand information diffusion dynamics within multi-level social networks.

Main Methods:

  • Agent-based modeling of simulated agents in multi-level social networks.
  • Analysis of information diffusion via three cascade types with varying norms.
  • Examination of factors like marriage structure, subgroup nesting, and decision rules.

Main Results:

  • Family grouping via marriage impedes consensus by slowing diffusion and increasing entropy.
  • Larger nested subgroups reduce redundant ties and enhance consensus.
  • Coalition-based or representative decision-making accelerates consensus by bypassing family-level clustering.

Conclusions:

  • Social structure significantly shapes consensus dynamics.
  • Findings bridge network topology, collective intelligence, and social evolution research.
  • Understanding these dynamics is key to collective intelligence evolution.