# #48: Robin Dunbar - Friends, Tribes and Social Cohesion

Page: https://stenobird.com/podcast/how-humans-work-podcast-1330381/48-robin-dunbar-friends-tribes-and-social-cohesion
Text version: https://stenobird.com/podcast/how-humans-work-podcast-1330381/48-robin-dunbar-friends-tribes-and-social-cohesion.md
Podcast: [How Humans Work Podcast](https://stenobird.com/podcast/how-humans-work-podcast-1330381)
Published: 2025-05-30T00:00:00+00:00
Episode link: https://howhumanswork.us/episode-48-robin-dunbar-part-2
Audio file: https://episodes.captivate.fm/episode/cee16501-9d0c-4623-b029-de45ad1c2e43.mp3
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JSON: https://stenobird.com/v1/public/podcasts/how-humans-work-podcast-1330381/episodes/48-robin-dunbar-friends-tribes-and-social-cohesion
Duration seconds: 3943

## Resource

Episode Summary Renowned evolutionary psychologist Robin Dunbar returns for part two of his conversation with Jef Szi and the How Humans Work Podcast , diving deeper into the limits and leaps of human social patterns. In this episode, Professor Dunbar expands on the evolutionary foundations of human relationships, moving beyond social grooming and the endorphin system to explore kinship and the deeper nature of our social lives. He begins by examining the cost and time investment required to maintain our inner circle of intimate friends. From there, he maps out the concentric layers of more peripheral friendships and the behaviors and expectations that characterize them. Dunbar emphasizes the vital role our closest five friends play in our wellbeing and longevity. We then explore how humans scaled up from the group sizes typical of primates to the now-famous “Dunbar’s Number” of 150. This leap—central to the Social Brain Hypothesis—reveals how brain size in primates correlates with social group size, due to the cognitive demands of managing complex, stable relationships. Dunbar illustrates these ideas through compelling examples—courtship, language, and religion—showing how humans have creatively repurposed existing biological mechanisms to sustain cohesion in increasingly larger groups. He also sheds light on how cultural practices like laughter, feasting, ritual, and storytelling serve to bind people together into broad, loosely connected “supergroups.” Ultimately, Dunbar offers a concentric model of our social world, illuminating the patterns, breakthroughs, and constraints of human sociality. This conversation helps us better understand our evolutionary journey and how we might draw on both embodied emotion and cognitive insight to navigate a highly uncertain futur…

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