Daughter-biased parental investment and limited paternal care promote matrifocality and matrilineal descent, both of which are forms of matricentric social organization. However, matrifocality can occur under patrilineal descent. We hypothesize that matrilineal descent could emergently organize social relationships if a society were normatively patrilineal but matrifocal. Furthermore, in matrifocal environments, male and female social lives are envisioned as sex-specific adaptive strategies. Males purportedly form large, flexible social support networks that conflict with conjugal partnership investment owing to a tradeoff in the allocation of effort associated with either investing in male social support or provisioning the conjugal household. However, no quantitative analyses exist about the effect of conjugal partnership formation on male social relations in matrifocal communities. Here we examine whether matrilineal kinship organizes male same-sex social relationships and the effect of conjugal partnerships on male social support in a normatively patrilineal, but matrifocal village. We find that matrilineal kinship influences male social support networks, but not labour cooperation. Consistent with a tradeoff associated with investing in male social support or a conjugal union, we find that labouring with a conjugal partner, but not conjugal partnership itself, reduces male labour and social support outcomes. Our results suggest new insights into men's roles in matricentric social organization: (1) matriliny can emerge in patrilineal systems when household economics shift toward matrifocality in which matrilineal descent is used to organize male social support, and (2) the degree to which this shift occurs depends on the proportion of men who invest in same-sex social networks as opposed to a conjugal partner and offspring. This article is part of the theme issue ‘The evolution of female-biased kinship in humans and other mammals’.
Reputations are an essential feature of human sociality and the evolution of cooperation and group living. Much scholarship has focused on reputations, yet typically on a narrow range of domains (e.g. prosociality and aggressiveness), usually in isolation. Humans can develop reputations, however, from any collective information. We conducted exploratory analyses on the content, distribution and structure of reputation domain diversity across cultures, using the Human Relations Area Files ethnographic database. After coding ethnographic texts on reputations from 153 cultures, we used hierarchical modelling, cluster analysis and text analysis to provide an empirical view of reputation domains across societies. Findings suggest: (i) reputational domains vary cross-culturally, yet reputations for cultural conformity, prosociality, social status and neural capital are widespread; (ii) reputation domains are more variable for males than females; and (iii) particular reputation domains are interrelated, demonstrating a structure consistent with dimensions of human uniqueness. We label these features: cultural group unity , dominance , neural capital , sexuality , social and material success and supernatural healing . We highlight the need for future research on the evolution of cooperation and human sociality to consider a wider range of reputation domains, as well as their social, ecological and gender-specific variability. This article is part of the theme issue ‘The language of cooperation: reputation and honest signalling’.
While ethnologists have long noted that females lack access to social capital across cultures, the magnitude of this effect is rarely examined. Here, we investigate the nature of gender bias in one dimension of social capital, reputation. We extract data on reputations from the electronic Human Relations Area Files (eHRAF) database, specifically the societies in the Standard Cross-Cultural Sample, and analyze whether there are fewer instances of feminine reputation relative to masculine reputation. In addition, we assess whether aspects of social structure or institutional biases in the production of ethnography affect the rate at which feminine reputations occur. We find that (a) most reputations are gendered male; (b) patrilocality and matriliny increase the rate at which feminine reputations occur, while patriliny decreases their occurrence; and (c) as female authorship increases over time, inclusion of feminine subject matter increases, which resulted in a greater incidence of feminine reputations. Ultimately, our analyses highlight the need for increased focus on feminine subject matters and gendered social capital in the discipline of anthropology.
Reputations are an essential feature of human sociality, critical for the evolution of cooperation and group living. Much scholarship has focused on reputations, yet typically on a narrow range of domains (e.g., prosociality, aggressiveness), usually in isolation. Humans can develop reputations, however, from any collective information. We conducted exploratory analyses on the content, distribution, and structure of reputation domain diversity across cultures, using the Human Relations Area Files ethnographic database. After coding ethnographic texts on reputations from 153 cultures, we used hierarchical modelling, cluster analysis, and text analysis to provide an empirical view of reputation domains across societies. Findings suggest: 1) reputational domains vary cross-culturally, yet reputations for cultural conformity, prosociality, social status, and neural capital are widespread; 2) reputation domains are more variable for males than females; and 3) particular reputation domains are strongly interrelated, demonstrating a structure consistent with dimensions of human uniqueness. We label these reputational features: Cultural group unity, Dominance, Sexuality, Social and material success, and Supernatural healing. Ultimately, through this work, we highlight the need for future research on the evolution of cooperation and human sociality to consider a wider range of reputation domains, as well as their patterning by social, ecological, and gender-specific pressures.
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