{"title":"Evolutionary perspectives on human aggression: introduction to the special issue.","authors":"Elizabeth Cashdan, Stephen M Downes","doi":"10.1007/s12110-012-9133-0","DOIUrl":"https://doi.org/10.1007/s12110-012-9133-0","url":null,"abstract":"<p><p>The papers in this volume present varying approaches to human aggression, each from an evolutionary perspective. The evolutionary studies of aggression collected here all pursue aspects of patterns of response to environmental circumstances and consider explicitly how those circumstances shape the costs and benefits of behaving aggressively. All the authors understand various aspects of aggression as evolved adaptations but none believe that this implies we are doomed to continued violence, but rather that variation in aggression has evolutionary roots. These papers reveal several similarities between human and nonhuman aggression, including our response to physical strength as an indicator of fighting ability, testosterone response to competition, a sensitivity to paternity, and baseline features of intergroup aggression in foragers and chimps. There is also one paper tackling the phylogeny of these traits. The many differences between human and nonhuman aggression are also pursued here. Topics here include the impact of modern weapons and extremes of wealth and power on both the costs and benefits of fighting, and the scale to which coercion can promote aggression that acts against a fighter's own interests. Also the implications of large-scale human sociality are discussed.</p>","PeriodicalId":224401,"journal":{"name":"Human Nature (Hawthorne, N.y.)","volume":" ","pages":"1-4"},"PeriodicalIF":2.5,"publicationDate":"2012-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s12110-012-9133-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40159240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Hormonal mechanisms for regulation of aggression in human coalitions.","authors":"Mark V Flinn, Davide Ponzi, Michael P Muehlenbein","doi":"10.1007/s12110-012-9135-y","DOIUrl":"https://doi.org/10.1007/s12110-012-9135-y","url":null,"abstract":"<p><p>Coalitions and alliances are core aspects of human behavior. All societies recognize alliances among communities, usually based in part on kinship and marriage. Aggression between groups is ubiquitous, often deadly, fueled by revenge, and can have devastating effects on general human welfare. Given its significance, it is surprising how little we know about the neurobiological and hormonal mechanisms that underpin human coalitionary behavior. Here we first briefly review a model of human coalitionary behavior based on a process of runaway social selection. We then present several exploratory analyses of neuroendocrine responses to coalitionary social events in a rural Dominican community, with the objective of understanding differences between in-group and out-group competition in adult and adolescent males. Our analyses indicate: (1) adult and adolescent males do not elevate testosterone when they defeat their friends, but they do elevate testosterone when they defeat outsiders; (2) pre-competition testosterone and cortisol levels are negatively associated with strength of coalitionary ties; and (3) adult males usually elevate testosterone when interacting with adult women who are potential mates, but in a striking reversal, they have lower testosterone if the woman is a conjugal partner of a close friend. These naturalistic studies hint that reciprocity, dampening of aggression, and competition among friends and allies may be biologically embedded in unique ways among humans.</p>","PeriodicalId":224401,"journal":{"name":"Human Nature (Hawthorne, N.y.)","volume":" ","pages":"68-88"},"PeriodicalIF":2.5,"publicationDate":"2012-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s12110-012-9135-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40162499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Life history theory and human reproductive behavior : Environmental/contextual influences and heritable variation.","authors":"K MacDonald","doi":"10.1007/BF02913038","DOIUrl":"https://doi.org/10.1007/BF02913038","url":null,"abstract":"<p><p>The purpose of this article is to develop a model of life history theory that incorporates environmental influences, contextual influences, and heritable variation. I argue that physically or psychologically stressful environments delay maturation and the onset of reproductive competence. The social context is also important, and here I concentrate on the opportunity for upward social mobility as a contextual influence that results in delaying reproduction and lowering fertility in the interest of increasing investment in children. I also review evidence that variation in life history strategies is influenced by genetic variation as well. Finally, I show that cultural shifts in the social control of sexual behavior have had differential effects on individuals predisposed to high- versus low-investment reproductive strategies. </p>","PeriodicalId":224401,"journal":{"name":"Human Nature (Hawthorne, N.y.)","volume":" ","pages":"327-59"},"PeriodicalIF":2.5,"publicationDate":"1997-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02913038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33856983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Attachment, mating, and parenting : An evolutionary interpretation.","authors":"J Belsky","doi":"10.1007/BF02913039","DOIUrl":"https://doi.org/10.1007/BF02913039","url":null,"abstract":"<p><p>A modern evolutionary perspective emphasizing life history theory and behavioral ecology is brought to bear on the three core patterns of attachment that are identified in studies of infants and young children in the Strange Situation and adults using the Adult Attachment Interview. Mating and parenting correlates of secure/autonomous, avoidant/dismissing, and resistant/preoccupied attachment patterns are reviewed, and the argument is advanced that security evolved to promote mutually beneficial interpersonal relations and high investment parenting; that avoidant/dismissing attachment evolved to promote opportunistic interpersonal relations and low-investment parenting; and that resistant/preoccupied attachment evolved to foster \"helper-at-the-nest\" behavior and indirect reproduction. </p>","PeriodicalId":224401,"journal":{"name":"Human Nature (Hawthorne, N.y.)","volume":" ","pages":"361-81"},"PeriodicalIF":2.5,"publicationDate":"1997-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02913039","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33856984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Birth order, sibship size, and status in modern Canada.","authors":"J N Davis","doi":"10.1007/BF02912492","DOIUrl":"https://doi.org/10.1007/BF02912492","url":null,"abstract":"<p><p>This paper investigates the possibility that birth order affects the degree to which individuals attain higher status. Humans give birth to a variable number of (usually) single offspring spaced one to many years apart, and continue to maintain contact with them for extended periods of time. The continued presence of older siblings, and arrival of younger ones, means that each child is reared in a different family environment. Research findings from the field of behavior genetics suggest that these differences have a significant impact on the development of individual differences between children in the same family. Although no two families are likely to be exactly the same, factors such as birth order remain constant across them, and may have similar influences. The present study examines the relationships between birth order, sibship size, and several variables thought to index future status attainment (status striving) in a random sample of Canadians. Firstborn children appear to be more status oriented than lastborns, and this effect is mediated by sibship size. While firstborn children are unaffected by the number of younger siblings they have, the status ambitions of youngest children decrease the more older siblings they have. Birth order effects on status attainment are not as strong as they are on status ambitions. </p>","PeriodicalId":224401,"journal":{"name":"Human Nature (Hawthorne, N.y.)","volume":" ","pages":"205-30"},"PeriodicalIF":2.5,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02912492","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34305239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Differential use of sensory information in sexual behavior as a function of gender.","authors":"R S Herz, E D Cahill","doi":"10.1007/BF02912495","DOIUrl":"https://doi.org/10.1007/BF02912495","url":null,"abstract":"<p><p>Olfactory information is critical to mammalian sexual behavior. Based on parental investment theory the relative importance of olfaction compared with vision, touch, and hearing should be different for human males and females. In particular, because of its link to immunological profile and offspring viability, odor should be a more important determinant of sexual choice and arousal for females than for males. To test this hypothesis a questionnaire was developed and administered to 332 adults (166 males, 166 females). Subjects used a 1-7 scale to indicate how much they agreed with a series of statements concerning the importance of olfactory, visual, auditory, and tactile information for their sexual responsivity. The data reveal that males rated visual and olfactory information as being equally important for selecting a lover, while females considered olfactory information to be the single most important variable in mate choice. Additionally, when considering sexual activity, females singled out body odor from all other sensory experiences as most able to negatively affect desire, while males regarded odors as much more neutral stimuli for sexual arousal. The present results support recent findings in mice and humans concerning the relation of female preferences in body odor and major histocompatibility complex (MHC) compatibility and can be explained by an evolutionary analysis of sex differences in reproductive strategies. This work represents the first direct examination of the role of different forms of sensory information in human sexual behavior. </p>","PeriodicalId":224401,"journal":{"name":"Human Nature (Hawthorne, N.y.)","volume":" ","pages":"275-86"},"PeriodicalIF":2.5,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02912495","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34305242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Human conversational behavior.","authors":"R I Dunbar, A Marriott, N D Duncan","doi":"10.1007/BF02912493","DOIUrl":"https://doi.org/10.1007/BF02912493","url":null,"abstract":"<p><p>Observational studies of human conversations in relaxed social settings suggest that these consist predominantly of exchanges of social information (mostly concerning personal relationships and experiences). Most of these exchanges involve information about the speaker or third parties, and very few involve critical comments or the soliciting or giving of advice. Although a policing function may still be important (e.g., for controlling social cheats), it seems that this does not often involve overt criticism of other individuals' behavior. The few significant differences between the sexes in the proportion of conversation time devoted to particular topics are interpreted as reflecting females' concerns with networking and males' concerns with self-display in what amount to a conventional mating lek. </p>","PeriodicalId":224401,"journal":{"name":"Human Nature (Hawthorne, N.y.)","volume":" ","pages":"231-46"},"PeriodicalIF":2.5,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02912493","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34305241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Experiment and illusion in reproductive medicine.","authors":"J Guillemin","doi":"10.1007/BF02692190","DOIUrl":"https://doi.org/10.1007/BF02692190","url":null,"abstract":"<p><p>The diffusion of medical technology is largely determined by the marketplace demands supported by national and historical contexts. Using the cases of cesarean delivery and newborn intensive care in the United States, this article presents the argument that the interaction of four factors accounts for the rapid diffusion of untested technologies. These factors are economic expansion in an unrestricted market, the vulnerability of the patient population, a social disposition towards emergency medicine, and the vested interest of medical specialists. </p>","PeriodicalId":224401,"journal":{"name":"Human Nature (Hawthorne, N.y.)","volume":" ","pages":"1-22"},"PeriodicalIF":2.5,"publicationDate":"1994-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02692190","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31851755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mother-infant bonding : A scientific fiction.","authors":"D E Eyer","doi":"10.1007/BF02692192","DOIUrl":"https://doi.org/10.1007/BF02692192","url":null,"abstract":"<p><p>A study of the research on postpartum mother-infant bonding shows that results from poorly constructed research programs were published in major journals and became a part of hospital policy because the bonding concept was politically useful in the struggle between advocates of natural childbirth and managers of the medical model of birth. The concept was also uncritically accepted because it was consistent with a longstanding ideology of motherhood that sees women as the prime architects of their children's personalities. </p>","PeriodicalId":224401,"journal":{"name":"Human Nature (Hawthorne, N.y.)","volume":" ","pages":"69-94"},"PeriodicalIF":2.5,"publicationDate":"1994-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02692192","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31851756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Predicting the future for newborns requiring intensive care.","authors":"L A Papile","doi":"10.1007/BF02692193","DOIUrl":"https://doi.org/10.1007/BF02692193","url":null,"abstract":"<p><p>When intensive care for newborns was introduced thirty years ago its primary goal was to improve the rates of survival of sick and premature infants. Medicine has been successful in attaining this goal; however, as more infants survive, the cost of intensive care and the additional cost of services and care for handicapped survivors continue to escalate. In order to curb the increasing cost of newborn intensive care, heightened initiatives directed at the prevention of premature births will be necessary. </p>","PeriodicalId":224401,"journal":{"name":"Human Nature (Hawthorne, N.y.)","volume":" ","pages":"95-102"},"PeriodicalIF":2.5,"publicationDate":"1994-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF02692193","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31851757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}