Cooperation, conformity, and the coevolutionary problem of trait associations

Area of Science:

• Evolutionary biology
• Social dynamics
• Human behavior

Background:

• Cooperative outcomes are challenging in large social systems due to infrequent interactions.
• While punishment helps, it doesn't fully resolve the cooperation dilemma.
• Conformist bias, where individuals copy the majority, is a key mechanism for cooperation.

Purpose of the Study:

• To investigate the conditions under which conformist bias evolves with cooperative behaviors.
• To determine the role of initial population structure in the coevolution of conformity and cooperation.
• To assess if conformist bias alone can explain high levels of human cooperation.

Main Methods:

• Agent-based modeling simulations were used to explore the evolution of social behaviors.
• The study examined the indirect evolution of conformist bias through its association with cooperation and costly punishment.
• Varying levels of initial population structure were simulated to test their impact.

Main Results:

• Strong initial population structure is essential for the evolution of associations between conformist bias and cooperative behaviors.
• Without sufficient initial structure, conformist bias and cooperation do not readily coevolve or reach high frequencies.
• The necessary initial level of association for coevolution does not emerge spontaneously over long timescales.

Conclusions:

• The coevolution of conformist bias and cooperative behaviors is highly dependent on initial population structure.
• Conformist bias alone may be insufficient to explain the high levels of cooperation observed in human societies.
• Conformist bias likely plays a role in cooperation but requires interaction with other social and demographic factors.