Humans aren’t built for tiny tribes anymore. We live in cities, corporations, and digital networks. Yet our brains still operate within social limits — often referred to as Dunbar’s number, roughly 150 meaningful relationships. Gossip helps manage that complexity.
Gossip helps spread information about social norms, alliances, and risks. It helps communities coordinate without everyone needing direct experience. Researchers have found that shared stories activate neuroendocrine responses that promote cooperation. And so, in simple terms, gossip keeps social systems running.
It informs us who can be trusted, who contributes positively, and what behaviours are acceptable. It encourages indirect reciprocity — help others today, earn respect tomorrow.
Without this informal information flow, large social groups would struggle to maintain cohesion.
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