Map your social layers using Dunbar's concentric circles

Know which five people are in your inner circle and who fills the 15 and 50 layers.

Why it works

Dunbar's research describes nested layers of social investment: approximately 5 intimates (seen weekly, high emotional support), 15 close friends (seen monthly), 50 good friends (seen a few times a year), and 150 meaningful acquaintances. Mapping your own network against these layers surfaces mismatches — a person you feel close to but rarely contact, or contacts you invest heavily in who are functionally acquaintances. Awareness is the prerequisite for intentional reallocation.

How to do it

1. Draw four concentric circles and place people in them by actual contact frequency and emotional closeness, not by how close you wish you were.
2. Notice discrepancies: people you want to be in your inner circle but rarely see, people you invest heavily in who belong in an outer ring.
3. Review the map quarterly as life circumstances change.
4. Use the map to make proactive decisions rather than waiting for relationships to drift by default.

Evidence

Dunbar's research found these approximate layer sizes across observational studies of Christmas card networks, phone call frequencies, and social network analyses; the layers are consistent but the exact numbers vary across studies. Zhou et al. (2005) found the layers form a discrete hierarchy with a consistent scaling ratio of roughly three between successive circles, giving the nested-layer model a quantitative structure beyond the raw counts. (observational)

The nested layers are observational averages; individual variation is significant, and the exact 5/15/50/150 figures should be treated as heuristics rather than precise cognitive limits.

Sources

• Dunbar, R. I. M. (1992). Neocortex size as a constraint on group size in primates. Journal of Human Evolution, 22(6), 469–493.
• Dunbar, R. I. M. (2010). How Many Friends Does One Person Need? Faber & Faber.
• Hill, R. A., & Dunbar, R. I. M. (2003). Social network size in humans. Human Nature, 14(1), 53–72.
• Zhou, W.-X., Sornette, D., Hill, R. A., & Dunbar, R. I. M. (2005). Discrete hierarchical organization of social group sizes. Proceedings of the Royal Society B: Biological Sciences, 272(1561), 439–444.
• Dunbar, R. I. M., & Spoors, M. (1995). Social networks, support cliques, and kinship. Human Nature, 6(3), 273–290.

Common mistake

Confusing digital connections (followers, LinkedIn contacts) with the layers Dunbar describes — social media expands reach without expanding cognitive relationship bandwidth.