According to the , primates may have evolved a large prefrontal cortex in order to help them successfully navigate complex and dynamic social groups.

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The social brain hypothesis proposes that the large prefrontal cortex in primates evolved to help them navigate complex social interactions and maintain relationships within their social groups. This theory argues that the challenges of living in large, dynamic social groups place cognitive demands on primates that favored the development of a larger and more sophisticated prefrontal cortex. The sexual selection hypothesis proposes that large brains evolved in primates due to mate choice and sexual competition, while the developmental brain hypothesis argues that the evolution of the primate brain was driven by developmental constraints and other factors unrelated to social behavior. The mere-exposure phenomenon is a psychological principle that suggests people tend to like things more the more they are exposed to them.

According to the , Primates May Have Evolved a Large