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  1. Lineage, Sex, and Wealth as Moderators of Kin Investment.Gregory D. Webster, Angela Bryan, Charles B. Crawford, Lisa McCarthy & Brandy H. Cohen - 2008 - Human Nature 19 (2):189-210.
    Supporting Hamilton’s inclusive fitness theory, archival analyses of inheritance patterns in wills have revealed that people invest more of their estates in kin of closer genetic relatedness. Recent classroom experiments have shown that this genetic relatedness effect is stronger for relatives of direct lineage (children, grandchildren) than for relatives of collateral lineage (siblings, nieces, nephews). In the present research, multilevel modeling of more than 1,000 British Columbian wills revealed a positive effect of genetic relatedness on proportions of estates allocated to (...)
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  • Human Beings as Evolved Nepotists.Steve Stewart-Williams - 2008 - Human Nature 19 (4):414-425.
    Inclusive fitness theory provides a compelling explanation for the evolution of altruism among kin. However, a completely satisfactory account of non-kin altruism is still lacking. The present study compared the level of altruism found among siblings with that found among friends and mates and sought to reconcile the findings with an evolutionary explanation for human altruism. Participants (163 males and 156 females) completed a questionnaire about help given to a sibling, friend, or mate. Overall, participants gave friends and mates as (...)
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  • Attack, disapproval, or withdrawal? The role of honour in anger and shame responses to being insulted.Patricia M. Rodriguez Mosquera, Agneta H. Fischer, Antony S. R. Manstead & Ruud Zaalberg - 2008 - Cognition and Emotion 22 (8):1471-1498.
    Insults elicit intense emotion. This study tests the hypothesis that one's social image, which is especially salient in honour cultures, influences the way in which one reacts to an insult. Seventy-seven honour-oriented and 72 non-honour oriented participants answered questions about a recent insult episode. Participants experienced both anger and shame in reaction to the insult. However, these emotions resulted in different behaviours. Anger led to verbal attack (i.e., criticising, insulting in return) among all participants. This relationship was explained by participants’ (...)
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  • Revisiting Psychological Mechanisms in the Anthropology of Altruism.Joseph Hackman, Shirajum Munira, Khaleda Jasmin & Daniel Hruschka - 2017 - Human Nature 28 (1):76-91.
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  • Does sexual selection explain human sex differences in aggression?John Archer - 2009 - Behavioral and Brain Sciences 32 (3-4):249-266.
    I argue that the magnitude and nature of sex differences in aggression, their development, causation, and variability, can be better explained by sexual selection than by the alternative biosocial version of social role theory. Thus, sex differences in physical aggression increase with the degree of risk, occur early in life, peak in young adulthood, and are likely to be mediated by greater male impulsiveness, and greater female fear of physical danger. Male variability in physical aggression is consistent with an alternative (...)
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