Authors examine suicidality within small-scale non-industrial societies. They use ethnographic data to test two models: deCatanzaro's inclusive fitness model and the bargaining model (suicide attempts as a costly signal of need). Limited support is found for deCatanzaro's inclusive fitness model while strong support is found for the bargaining model. Support for deCatanzaro's inclusive fitness model increased with increasing latitude; authors suggest that in climactically-harsher environments, in which elderly or infirm individuals may impose a higher burden on kin, completed suicide occurs more because it might increase inclusive fitness. Fit of and support for each model were differentially age-dependent.

Researchers coded 473 texts from 53 cultures on suicidal behavior in the Probability Sample Files looking for evidence to support a new theoretical framework called the Costly Apology Model (signaling "I am genuinely remorseful for my actions, and you can trust that I will not do it again," (7)) to explain suicidal behavior that occurs after someone violates one or more social norms. This is theorized to be distinct behavior from the Bargaining Model (signaling "My fitness is genuinely being threatened, and I need your support." (7)) which could explain suicidal behavior after someone suffers harm from another, and from the Inclusive Fitness Model, where suicide occurs as a fitness behavior when an individual cannot reproduce or has a high cost to the fitness of their kin. .

Researchers coded 473 texts from 53 cultures on suicidal behavior in the Probability Sample Files looking for evidence to support a new theoretical framework called the Costly Apology Model (signaling "I am genuinely remorseful for my actions, and you can trust that I will not do it again," (7)) to explain suicidal behavior that occurs after someone violates one or more social norms. This is theorized to be distinct behavior from the Bargaining Model (signaling "My fitness is genuinely being threatened, and I need your support." (7)) which could explain suicidal behavior after someone suffers harm from another, and from the Inclusive Fitness Model, where suicide occurs as a fitness behavior when an individual cannot reproduce or has a high cost to the fitness of their kin. .

Researchers coded 473 texts from 53 cultures on suicidal behavior in the Probability Sample Files looking for evidence to support a new theoretical framework called the Costly Apology Model (signaling "I am genuinely remorseful for my actions, and you can trust that I will not do it again," (7)) to explain suicidal behavior that occurs after someone violates one or more social norms. This is theorized to be distinct behavior from the Bargaining Model (signaling "My fitness is genuinely being threatened, and I need your support." (7)) which could explain suicidal behavior after someone suffers harm from another, and from the Inclusive Fitness Model, where suicide occurs as a fitness behavior when an individual cannot reproduce or has a high cost to the fitness of their kin. .

Researchers coded 473 texts from 53 cultures on suicidal behavior in the Probability Sample Files looking for evidence to support a new theoretical framework called the Costly Apology Model (signaling "I am genuinely remorseful for my actions, and you can trust that I will not do it again," (7)) to explain suicidal behavior that occurs after someone violates one or more social norms. This is theorized to be distinct behavior from the Bargaining Model (signaling "My fitness is genuinely being threatened, and I need your support." (7)) which could explain suicidal behavior after someone suffers harm from another, and from the Inclusive Fitness Model, where suicide occurs as a fitness behavior when an individual cannot reproduce or has a high cost to the fitness of their kin. .

Rootman tests a formulation of Durkheim's (1897) theory of suicide. Independent variables include the amount a society, group, or social condition is integrated or regulated.

This study tests for an association between suicide rates and cultural fear of the dead. Tests do not support a significant relationship.

This study examines the relationship between social complexity and frequency of suicide. Empirical analysis suggests a positive association between these variables. The author discusses the usefulness of Durkheimian and thwarting disorientation theories in interpreting the findings.

This paper investigates the relationship between discipline experiences in preindustrial societies and aggressive behavior at the societal level. No associations are found between discipline experiences and suicide, murder, aggression resulting from alcohol consumption, or aggression expressed in war-making.

This study reexamines Durkheim’s theory of social integration and suicide and tests for an association in a cross-cultural sample of pre-literate societies. Contrary to Durkheim’s theory, the author finds that suicide varies inversely with both social and religious integration. Results also suggested that suicide is negatively associated with a society’s ritual activity. Overall it is suggested that alienated persons in highly integrated societies will be at a greater risk of suicide than those in less integrated societies.