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We examine community longevity as a function of group size in three historical, small scale agricultural samples. Community sizes of 50, 150 and 500 are disproportionately more common than other sizes; they also have greater longevity. These values mirror the natural layerings in hunter-gatherer societies and contemporary personal networks. In addition, a religious ideology seems to play an important role in allowing larger communities to maintain greater cohesion for longer than a strictly secular ideology does. The differences in optimal community size may reflect the demands of different ecologies, economies and social contexts, but, as yet, we have no explanation as to why these numbers seem to function socially so much more effectively than other values.

Original publication

DOI

10.1016/j.evolhumbehav.2017.11.001

Type

Journal article

Journal

Evol Hum Behav

Publication Date

01/2018

Volume

39

Pages

106 - 111

Keywords

C19th utopian communities, Fractal layering, Hutterites, Kibbutz, Small scale societies