What researcher argued that language evolved to facilitate social cohesion among small groups?

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Robin Dunbar developed the social brain hypothesis, which proposes that language evolved specifically to allow for social bonding and cooperation within small groups. Dunbar suggests that language allowed for more efficient and nuanced communication within these groups, leading to increased social cohesion and cooperation, which in turn conferred evolutionary advantages.

What Researcher Argued That Language Evolved to Facilitate Social Cohesion