High infant and child mortality rates are suggested to be one of the most enduring and important features of ancestral human environments, referred to as the Environment of Evolutionary Adaptedness (EEA). These rates contrast with the very low rates of infant and child mortality among many industrialized nations since the 19th and 20th centuries. The authors compare data from recent hunter-gatherer and agricultural societies, historical records, and non-human primates in attempt to quantitatively describe infant and child mortality rates during the EEA.

This study provides a cross-cultural examination of the definitions of old age. Further research on these definitions and their implications is suggested.

This article uses cross-cultural methodology to examine the classification and treatment of the aged. Results suggest that the combination of supportive/unsupportive treatment is associated with the intact/decrepit age grouping.

This study discusses the distribution of the treatment of the aged across a sample of pre-industrial societies. Data illustrate that the elderly were treated in a non-supportive or death-hastening manner in the majority of societies, dispelling the notion that a golden age/isle existed in pre-industrial societies in which the elderly were revered and supported. Results also suggest a relationship between age and treatment of the elderly and climate, social, and subsistence variables and the treatment of the aged.

This study examines the status and treatment of the elderly in non-industrial societies. Associations are found between social complexity, subsistence type, and the status and treatment of the elderly.

This study explores predictors of variation in two dimensions of marital residence patterns among hunter-gatherers: 1) the tendency toward patrilocality versus matrilocality and 2) the tendency toward unilocality versus bilocality.

The present research investigates food sharing and labor sharing practices of 98 nonindustrial societies. The aims are to: 1) document the frequency and scope of sharing, and 2) test the theory that greater sharing is adaptive in societies subject to more resource stress (including natural hazards).

This article uses the Standard Cross-Cultural Samples to test the relationship between disease and economic growth among sub-Saharan African societies. The authors suggest that a higher disease prevalence limits social integration and economic development since pre-colonial times. The variable measuring economic growth is the complexity of large or impressive structures. The hypotheses are that 1) pathogen stress is negatively correlated to the presence of complex buildings, and 2) pathogen stress is positively correlated to increased ethnic diversity. The results support both hypotheses, and there are additional results, like 1) the negative correlation between pathogen stress and current income per capita and 2) the negative correlation between the increased ethnic diversity and current income per capita. Overall, this article shows the robust relationship between disease and economic development.

This article examines the homoarchical custom of hereditary community leadership. Four predictors are identified: (1) permission of premarital heterosexual intercourse by females, (2) small community population, (3) multiple social classes or castes, and (4) praying or violence as a component of community ceremonies. Log linear analysis shows all but the third are significantly associated with hereditary community leadership.

The link between wartime violence and social complexity has been debated through a variety of lenses. Using a cross-cultural sample, this researcher finds no evidence for increased or decreased indiscriminate killing as a result of social complexity. In this study, war is defined as “lethal violence between social groups” (2). While there was no relationship between these variables, this researcher suggests a potential link between territorial/political expansion and indiscriminate killing.