Research Article

Co-Residence Patterns in Hunter-Gatherer Societies Show Unique Human Social Structure

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Science  11 Mar 2011:
Vol. 331, Issue 6022, pp. 1286-1289
DOI: 10.1126/science.1199071

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  1. Fig. 1

    Comparison of same-sex and cross-sex sibling co-residence contingent on survival by age for precontact Ache women (A) and men (B). Data points show mean proportions per age group of surviving siblings who co-reside. Bars indicate 95% confidence intervals; triangles mark the baseline proportion of co-residence for all adults in the population who are more than three genealogical steps removed (and not married to each other). Brother-brother and brother-sister co-residence is common throughout the life span, but after their 30s, women are no more likely to co-reside with another living sister than with any randomly selected, unrelated adult.

  2. Fig. 2

    Mean band composition from adult ego’s point of view for 58 Ache bands and 6 Ju/’hoansi bands (data in table S2). The category “distant affines” includes spouses of distant kin, distant kin of spouse, and affines of affines. The category “No relation” includes all adult dyads that cannot be connected in five or fewer total steps of kinship and marriage with no more than two marriage links in the chain of connection. The shaded region shows all band members genetically related to ego.