This study is a comprehensive analysis of female and male genital mutilation/cutting (FGM/C and MGM/C) practices, including their history and socio-ecological correlates, using a phylogenetic cross-cultural framework. It employed two global ethnographic samples, the Ethnographic Atlas (EA) and the Standard Cross-Cultural Sample (SCCS), and two subsets of the phylogeny (supertree) of human populations based on genetic and linguistic data, to investigate the variables that may have led to the introduction of these practices, and to determine where and when they may have originated. The study suggests that MGM/C probably originated in polygynous societies with separate residence for co-wives, supporting a mate-guarding function, and that FGM/C likely originated subsequently and almost exclusively in societies already practicing MGM/C, where it may have become a signal of chastity. Both practices are believed to have originated multiple times, some as early as in the mid-Holocene (5,000–7,000 years ago). The study posits that GM/C co-evolves with and may help maintain fundamental social structures and that the high fitness costs of FGM/C are offset by social benefits, such as enhanced marriageability and social capital.

This article examines the conditions under which slavery occurs in preindustrial societies. Results suggest that social stratification and the existence of open resources are both necessary conditions for the occurrence of slavery.

"Seven of Max Weber's ideal-typical specifications for 'rational bureaucracy' are reformulated as a system of three 'bureaucratic' and four 'rational' variables. It is proposed that (a) bureaucratic variables are positively associated; (b) rational variables are positively associated; but that (c) rational variables are negatively associated with bureaucratic variables." Hypotheses are supported.

This article tests the assumption that foragers are more likely to experience regular and severe food shortages than sedentary agriculturalists. The results indicate that there is no statistical difference in the quantity of available food or the frequency or extent of food shortages between preindustrial foragers, recent foragers, and agriculturalists.

This article examines predictors of intimacy between husbands and wives. Emphasis is on equality of spouses. A causal model is presented.

This study exmaines the presence of High Gods in societies as a function of subsistence type, population size, and stratification. High Gods are thought to be a mechanism to encourage collective action in the face of environmental challenges. Animal husbandry was found to be a strong predictor of High Gods, especially gods that are active in human affairs or morally supportive.

Authors explore the relationship between privacy among newlywed couples and romantic love as a basis for marriage. Authors also consider the relationship between newlywed privacy and kin avoidence. Both associations are found to be statistically significant.

This article proposes that ground plans may be used as a criterion for determining the relative permanence of settlement patterns in archaelogical societies. Results suggest that impermanent settlements and small community size are significantly associated with circular ground plans and that permanent settlements with larger community sizes are significantly associated with rectangular ground plans.

This article explores the relationship between marital residence and romantic love; results suggest that romantic love is most important in societies with non-neolocal marital residence. The author explores potential functions of romantic love, including bolstering against the divisive pressure of relatives, or to substitute for economic interdependence between spouses.

This study examines the consequences of birth order; results suggest that the firstborn child is more likely to have social authority as they grow older (they have siblings’ respect, they control property or head kin groups, etc.). The authors suggest that this authority may be legitimated by extra attention firstborns receive though elaborate birth ceremonies and teknonymy.