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Updated: Jun 1, 2026
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Published on: October 29, 2016
The concurrent evolution of cooperation and the population structures that support it
Simon T Powers1, Alexandra S Penn, Richard A Watson
1Science & Engineering of Natural Systems Group, School of Electronics & Computer Science, University of Southampton, Southampton SO17 1BJ, UK. stp2@ecs.soton.ac.uk
Summary
Cooperation evolves alongside population structure traits. The study shows that the opportunity for cooperation can drive the creation of supportive population structures, linking social behavior and group dynamics.
Area of Science:
- Evolutionary biology
- Behavioral ecology
- Theoretical ecology
Background:
- Cooperation models typically assume static population structures, overlooking genetic traits influencing them.
- Organismal traits like group size preference impact individual relatedness and selection dynamics (kin/group selection).
- Static models fail to explain the origin of cooperation-supporting population structures.
Purpose of the Study:
- To investigate the concurrent evolution of population structure traits and social behavior.
- To demonstrate how population structure influences social evolution and vice versa.
- To explain the origin of cooperation-supporting population structures.
Main Methods:
- Developed a theoretical model examining the simultaneous evolution of group size preference and social behavior.
- Analyzed the interplay between genetic traits affecting population structure and those influencing social behavior.
- Investigated the role of linkage disequilibrium in mediating selection pressures.
Main Results:
- Population structure significantly drives social evolution, as previously shown.
- Crucially, the opportunity for cooperation can actively shape population structures that favor it.
- Linkage disequilibrium between social behavior and population-structuring traits facilitates this reciprocal influence.
Conclusions:
- Models of cooperation must account for the evolution of population structure for a complete understanding.
- Cooperation and population structure co-evolve, with each influencing the other's evolutionary trajectory.
- The study provides a framework for understanding the origin of cooperation through the dynamic interplay of social behavior and population structure.
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