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In- and Out-Groups

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The HoneyComb Paradigm for Research on Collective Human Behavior
06:48

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Published on: January 19, 2019

The group selection controversy.

E G Leigh1

  • 1Smithsonian Tropical Research Institute, Balboa, Panamá leighe@si.edu

Journal of Evolutionary Biology
|December 17, 2009
PubMed
Summary
This summary is machine-generated.

Group selection can explain altruism when it benefits a group, even if individuals within the group do not benefit. This concept, known as kin selection, helps understand cooperation and evolution.

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Area of Science:

  • Evolutionary biology
  • Behavioral ecology

Background:

  • Darwinian natural selection initially struggled to explain altruism.
  • Early theories proposed group selection to explain sustainable exploitation, but faced challenges regarding within-group vs. between-group selection dynamics.

Purpose of the Study:

  • To explore the influence of group selection on evolution.
  • To reconcile different theoretical frameworks for understanding altruism and cooperation.

Main Methods:

  • Utilizing Price's theorem to analyze interactions between different levels of selection.
  • Extending Hamilton's rule to incorporate phenotypic altruism among interacting neighbors.

Main Results:

  • Demonstrated that group selection can prevail under specific conditions, as outlined by Hamilton's rule.
  • Showcased how group selection has driven major evolutionary transitions.
  • Extended the concept of inclusive fitness to encompass group selection dynamics.

Conclusions:

  • Altruism and cooperation can evolve through various mechanisms, including kin selection and group selection.
  • Hamilton's rule provides a general framework for understanding selection across different levels.
  • Concrete concepts like kin and group selection are essential for biologists to fully grasp the evolution of cooperation.