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> ...ifferent economic circumstances. <em>With the exception of a few communes that required celibacy throughout their existence and did not adopt children, all of the communities we consider contain both adults and children. We may reasonably assume that the tensions that eventually give rise to community fission occur between adults, and hence that the effective functional group size is actually the number of adults. However, the routes by which conflict and stresses arise within communities can be complex. Evidence from primates, for example, suggests that the principal factor precipitating group fission may be stresses arising from female-female competition (Dunbar, 2017, Dunbar et al., n.d). Conflict between families over children, or at least conflict between the interests of one's children versus the interests of the community as a whole, may also be important for humans, and these can often be social (who has the right to discipline whose children). Since almost all analyses of social group size, in humans as well as nonhuman primates and other mammals, focus on total group size, we here simply follow common practice.</em> In sum, analyses of the size and... |