Given that research on female political representation tends to be overlooked across many societies, this study investigates whether historical female political leadership influences contemporary female political representation in Africa. The authors hypothesize that precolonial traditions of women in leadership persist in shaping present-day representation. Using two original datasets—one from cross-cultural samples and one from previous elections—they find that ethnic groups with histories of female leaders have more women elected today, with results also show that many institutional factors have shaped women’s traditional political roles, and that the effects of historical colonialism have reversed much of their influence. The conclusion is that historical female leadership continues to affect modern representation, though shaped by institutional change.

Lowes and Nunn test the theory that the transatlantic and Indian Ocean slave trades of the thirteenth to nineteenth centuries prompted a shift towards matrilineal kinship systems throughout sub-Saharan Africa. Controlling for ecological variables commonly thought to affect kinship structure (including ruggedness of terrain, suitability for agriculture, etc.), the authors find a significant correlation between the number of people enslaved from a given ethnic group, and the tendency of that group towards a matrilineal kinship system. Polygyny was also identified as a statistically significant characteristic of communities most impacted by the slave trade.

The second and third parts of this book classify the economic systems of foraging and agricultural societies in the SCCS based on correlations between their institutions of property an distribution. These economic types are then examined for relationships with other social, political, demographic, and environmental factors in order to draw tentative conclusions regarding the origins of the Agricultural and Industrial Revolutions. The fourth part of the book uses cross-national data to examine similar associations in industrial/service economies, and is not included here.

Considerable disagreement exists in regard to the origin and distribution of economic phenomena such as money, slavery, markets, exchange, and imbalanced transfers. Here the author utilizes a worldwide cross-cultural sample of 60 pre-industrial "societies" to empirically test many economic hypotheses, with a focus on distributional mechanisms and institutions.

The authors of this study integrate recent data with data on ancestral ethnic groups' exposure to the slave trade in order to examine the relationship between this historical exposure and children vaccination status against measles. They find evidence to support their hypothesis that children from mothers whose ancestors belonged to an ethnic group that exported slaves are less likely to be vaccinated against measles, theorizing that this correlation stems from distrust in medical and governmental institutions. Supporting this theory, they also find that groups historically exposed to the slave trade that have higher preference for traditional practices are even less likely to vaccinate their children against measles.

Although research has been conducted on individual social and psychological factors on suicide rates, there has yet to be any exploration into the role of civil society participation. This article investigates whether civil society participation influences suicide rates cross-nationally. The study hypothesizes that both political and non-political participation can reduce suicide rates by providing social and psychological benefits. Using data from 2000 to 2019 across 156 countries, as well as controlling standard variables and endogeneity, they find that both political and non-political civil society participation have a negative and statistically significant effect on suicide rates. The conclusion is that engagement in civil society, whether political or non-political, may help lower suicide rates nationally.

This article investigates whether trade with a world-system influences descent and residence rules in non-state societies. Data suggest that involvement in the capitalist world economy is associated with matrilineal forms of descent and residence, likely because men will be encouraged to leave their communities to participate in trade labor.

This paper examines the relationship of productive variation in land between ethnic groups to determine if an increased range of producible goods will increase trade, thus decreasing language diversity between neighboring groups. The author initially found that high-variation in land production lessened the diversity of language between ethnic groups in that area. To further test this correlation, the author found that high-productive variation increased trade and exogamous marriage and decreased inter-ethnic conflict. Based on these findings, the author suggests that neighboring ethnic languages co-evolved through the economic benefit of inter-ethnic trade and social interaction.

The present study aims to assess the reliability of Simmons' (1937) database of 109 variables coded for 71 societies. Simmons' data was evaluated against matching societies and variables from Murdock's (1967) Ethnographic Atlas. The ultimate purpose of Rudmin's analysis is to identify the features of societies that are correlated with the private ownership of property. To do so, Simmons' reliable variables are tested against four measures of property ownership, two from Simmons and two from Murdock. Rudmin discusses results and speculates why certain clusters of societal variables correlate with private property ownership.

The present study examines the validity of Robert Redfield's one-dimensional "folk-urban continuum" in a sample of 70 pre-industrial societies. As hypothesized, a factor analysis revealed that there is more than a single overriding factor about the "folk-urban continuum." These variables include kinship organization, size-complexity, and relative isolation. The author also contends there is an inverse relationship between relative isolation and size-complexity.