This article tests hypotheses relating altered states of consciousness, healing and social structure variables such as gender stratification, female participation, and kinship structure. Results did not support an association between ASCs and gender stratification, but did suggest distinct correlates of possession versus trance healing.

Humans, just like other mammals, tend to allow greater sexual freedom for men rather than women. Furthermore, females are burdened with the majority of parenting. Do parenting costs limit sexual unrestrictedness to a different degree for males and females? The authors find that across 48 cultures, as women’s parenting costs decreased through improved physiological and economic conditions, women’s sexual unrestrictedness increased.

Finger millet, pearl millet, and sorghum are important drought-tolerant crops used as primary staple crops in drylands. Despite their long history, they have received less attention in recent years and their production has decreased. New models show that annual precipitation is not the only factor affecting their agriculture, but other variables like growing cycle duration, soil water-holding capacity, and soil nutrient availability also play a crucial role, as evidenced by ethnographic data. The traditional cultivation practices of these crops can be a sustainable response to the increasing aridity levels worldwide and can contribute to the resilience of dryland agriculture.

This study analyzed fire use in 93 hunter-gatherer groups based on ethnographic texts from eHRAF in order to improve our understanding of early hominin fire use. The researchers collected data on the groups' methods of making fire, the ways they used fire, and when and where they created fires. The study found that some groups either did not know how to make fire using traditional methods or had very few members who knew how to use such methods. The study also found that many groups preferred to preserve fire rather than create it anew, even carrying it between camps. Beyond this, the ways in which fire was created and used varied widely between hunter-gatherer groups. These findings have implications for understanding early pyrotechnology and the interpretation of the presence or absence of fire residues in the Palaeolithic archaeological record. The results suggest that the absence of fire residues may indicate the absence of fire-making knowledge and skills rather than just taphonomic processes, and that the presence of fire residues does not necessarily indicate the ability to manufacture fire.

This book investigates individual and group responses to death and the problems that death can create in a society. Several hypotheses regarding grief and mourning, as well as their variation with other societal variables, are supported with cross-cultural tests.

The authors assemble an inventory of burning practices based on cross-cultural ethnographic data in order to elucidate or provide interpretive range for burning patterns seen in the archaeological record. Although no explicit hypotheses are tested, descriptive generalizations are proposed.

The researchers introduce the Pulotu database to readers, reviewing its function and role in future research. Researchers demonstrate the utility of the database by testing for headhunting cross-culturally. Findings include the presence of headhunting practices across proto-Austronesian cultures.

Is grammatical complexity shaped by sociodemographic and sociolinguistic factors? The previously accepted "linguistic niche hypothesis" claims that with an increased number of nonnative speakers in a social group (high exotericity), grammatic complexity decreases; on the other hand, grammatical complexity increases amongst isolated linguistic communities (low exotericity). Through the use of spatiophylogenetic modelling of 1314 languages, the authors of this study do not find adequate evidence to support the linguistic niche hypothesis. Instead, they suggest that linguistic complexity is better predicted by phylogeny and geographic contiguity.

This article tests hypotheses related to kinship terms, cousin marriage, and descent rules. Omaha, Crow, Eskimo, and Iroquois systems are each significantly associated with different kinship rules. Material from Northern Ghana is also considered.

The purpose of this paper is to consolidate the four available listings of the definitions of settlement size as it is used as a measure of societal complexity. The definitions come from the previously published works of Tatje and Naroll (1970), Naroll and Divale (n.d.), Naroll (1956), and Ember (1963).