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Updated: Jan 24, 2026

Molecular Evolution of the Tre Recombinase
Published on: May 29, 2008
Conjoining uncooperative societies facilitates evolution of cooperation
Babak Fotouhi1,2, Naghmeh Momeni3,4, Benjamin Allen3,5,6
1Program for Evolutionary Dynamics, Harvard University, Cambridge, MA, USA. babak_fotouhi@fas.harvard.edu.
Connecting segregated groups, even those that inhibit cooperation, can restore collective cooperation. Strong intergroup ties are crucial for social network cohesion and promoting cooperation, especially in increasingly connected societies.
Area of Science:
- Evolutionary game theory
- Social network analysis
- Sociology
Background:
- Social structure significantly influences the development and persistence of cooperation.
- Fragmented societies often face challenges in maintaining collective cooperation.
Purpose of the Study:
- To investigate the evolutionary dynamics of cooperation within fragmented social structures.
- To determine if and how connecting segregated groups can impact cooperation.
- To identify the role of intergroup ties in fostering cooperation.
Main Methods:
- Analysis of cooperation dynamics on random and non-random graphs.
- Examination of cooperation in empirical social networks.
- Modeling the effects of intergroup connectivity on cooperation.
Main Results:
- Conjoining segregated groups, even those initially inhibiting cooperation, can successfully rescue collective cooperation.
- Intergroup ties are essential for linking social network components and facilitating cooperation.
- A significant reduction in the required benefit-to-cost ratio for sustaining cooperation was observed in many scenarios.
Conclusions:
- Strategic connection of social groups can overcome cooperation inhibition.
- Intergroup connectivity is a key factor in promoting cooperation in fragmented societies.
- Global connectivity, when managed effectively, holds potential for enhancing worldwide cooperation.
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