Patterns of three variables of reproductive strategies in male New World primates are examined: (i) how males obtain access to potential mates; (ii) how males obtain actual mating opportunities; and (iii) how males affect infant survival and female reproductive success. Male opportunities to associate with females, whether by remaining in their natal groups, dispersing and forming new groups, or dispersing and taking over or joining established groups, are strongly influenced by local population densities and correlate with female (...) reproductive rates and the extent of female reproductive seasonality and synchrony. Differences in male mating success are affected by female accessibility, whether male-male and male-female relationships are hierarchical or egalitarian, and whether female reproduction is seasonally restricted. Patterns of male behavior toward infants, characterized as active assistance, overt interference, or benign tolerance, appear to co-vary with differences in the degree to which males can affect female reproductive rates.These qualitative analyses suggest that the reproductive strategies of male New World primates can be classified along a continuum ranging from conservative to daring depending on whether female reproductive rates are relatively slow or fast and whether reproduction is strongly or weakly linked to seasonal ecological variables. Males adopt the conservative strategy of staying in their natal groups, forfeiting exclusive mating opportunities, and treating infants with tolerance when female reproduction is constrained by ecological factors. Conversely, males adopt the more daring strategy of dispersing and competing when potential payoffs through their ability to affect female reproduction are high. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Male Reproductive Strategies in Sherwood Anderson's "The Untold Lie"Judith P. SaundersSingled out repeatedly as one of the finest stories in Sherwood Anderson's Winesburg, Ohio, "The Untold Lie" (1919) has attracted surprisingly little sustained critical comment.1 Like all the stories in the Winesburg cycle, this one delineates a revelatory moment of inner turmoil. There is little outward action; conflict and suspense are generated chiefly in the interior of (...) the protagonist's psyche, focusing on his ambivalence as husband and father. Readers become privy to "the buried life" of unacknowledged impulses and the "hidden truth" of repressed resentments,2 as Anderson's central characters struggle with the antithetical "choices available to the individual as biology works its will."3 A portrait of the male mind deliberating the relative advantages of alternative reproductive strategies, the story notably repays biosocial investigation. The theoretical framework, as well as the intellectual rationale, for undertaking biosocial investigation of literary texts has been explained ably by critics and aestheticians such as Joseph Carroll, Brett Cooke, Ellen Dissanayake, Robert Story, and others. Readers unfamiliar with the historical and theoretical foundations of Darwinian literary criticism will find useful commentary in works by these and other thinkers in this rapidly growing field.4Anderson concentrates on the interactions between two men at different stages in life, one middle-aged, perhaps fifty, and one youthful, "only twenty-two."5 The older man, Ray Pearson, has made his most important reproductive decisions well before the story begins: he has been married for many years and fathered half a dozen children (p. 203). He works as a farm hand, eking out a meagre living for his family by means of hard physical labor. A few details are sufficient to suggest [End Page 311] his poverty: his house is "tumble-down," his children "thin-legged," his coat torn and shiny with age (pp. 203, 206). Ray's wife, "sharp" in both features and voice, appears to be a perpetually anxious scold, concerned with fundamental problems of family subsistence. Ray's direct fitness (as measured by reproductive success) promises to be respectable, but the task of rearing his numerous offspring to adulthood has required and will continue to require his utmost effort and full-time commitment. He is just barely able to support his family (food is being purchased on a day-by-day basis), and there is little margin of safety in his situation.As foil to Ray, Anderson presents Hal Winters, a man not only younger but different in physique, in temperament, and in social class. Hal is big, tall, and broad shouldered; by way of contrast, Ray's shoulders are described as "rounded by too much and too hard labor," and he is "almost a foot shorter" than the robust Hal (p. 203ff). Inclined to prototypical masculine display, Hal is observed "roistering" about the town at night, dressing in "cheap flashy clothes." He challenges his own father in a fist fight, and as a result he is arrested and jailed. His brash and often reckless behavior is very unlike that of the "quiet, nervous," and "altogether serious" Ray. In the community Hal has the reputation of "a bad one." A fighter, a drinker, and a womanizer, he is "always up to some devilment." Unsurprisingly, Hal's family background is said not to be particularly respectable. The fathers of both Hal and Ray are small-business owners: the Winters operate a sawmill, the Pearsons a bakery. (The narrator never explains why Ray did not join or succeed his father in the bakery business, which presumably would have offered him a better income and a physically less onerous profession.) The stated difference in social standing appears to derive from the two families' differing records of conduct.Hal's aggressive propensities seem to be at least in part hereditary. He is "the worst" of three notoriously bad brothers, all sired by "a confirmed old reprobate" (pp. 202–3). The father, old Windpeter Winters, is remembered best for the gratuitous violence of his death. Drunk, he drove his team of horses along the railroad tracks straight into the path of an oncoming train, having slashed with his whip at a neighbor who... (shrink)

An explanation of the inter-gender difference in longevity consistent with the 'disposable soma' theory of ageing is proposed. It is based on the concept of r-K selection as applied to the inter-gender situation. The concept predicts that the gender with a higher potential reproductive rate (males) should invest relatively less in somatic maintenance, which in its turn should result in a lower longevity according to the 'disposable soma' theory of ageing. In females, which are interpreted as K-selected organisms, the (...) reproductive strategy strongly depends on steady, secure constitution designed for oocyte/embryo bearing and is therefore closely related to somatic maintenance, whereas in (r-selected) males it has a greater behavioural component - risky, variable, with a greater potential reproductive success at the expense of somatic maintenance. The higher metabolic and growth rates, a higher premature mortality and a longer period of sexual competence of males also find explanation as a complex of r-selected traits. (shrink)

Sex-biased investment in children has been explored in a historic population in northern England, 1600 to 1800, following a family reconstitution study. An examination of the wills and other available data identified three social groups: the elite, tradesmen, and subsistence farmers. The community lived under marginal conditions with poor and fluctuating levels of nutrition; infant and child mortalities were high. Clear differences were found between the social groups, and it is suggested that the elite wetnursed their daughters whereas the elite (...) mother breast-fed her sons for only a short period and introduced supplementary feeding early. The wives of the tradesmen probably breast-fed both sexes for the same length of time. Subsistence farmers may have weaned their sons earlier than daughters. The results are discussed in terms of possible differences in investment strategies. The investment strategy of the elite group was probably male-biased but may, in practice, have favored the female offspring. (shrink)

Individual differences in moral views are often explained as the downstream effect of ideological commitments, such as political orientation and religiosity. Recent studies in the U.S. suggest that moral views about recreational drug use are also influenced by attitudes toward sex and that this relationship cannot be explained by ideological commitments. In this study, we investigate student samples from Belgium, The Netherlands, and Japan. We find that, in all samples, sexual attitudes are strongly related to views about recreational drug use, (...) even after controlling for various ideological variables. We discuss our results in light of reproductive strategies as determinants of moral views. (shrink)

1,857 adults rated the grandparental solicitude they received in childhood. Through a simple model based on the evolutionary concepts of ontogenetically differentiated reproductive strategy and paternity confidence, an ordered discriminative pattern of grandparental caregiving was predicted and confirmed by solid main effects, based on 603 complete cases. The maternal grandmother was the most caring. Unlike prevalent gender stereotypes, she was followed by the maternal grandfather, the paternal grandmother, and the paternal grandfather. The preferential grandparental solicitude was not influenced by (...) residential distance, grandparent age, and availability of other grandparents. A predicted higher correlation for male than for female progenitors between solicitude and phenotypic resemblance could be confirmed. (shrink)

This target article presents an integrated evolutionary model of the development of attachment and human reproductive strategies. It is argued that sex differences in attachment emerge in middle childhood, have adaptive significance in both children and adults, and are part of sex-specific life history strategies. Early psychosocial stress and insecure attachment act as cues of environmental risk, and tend to switch development towards reproductive strategies favoring current reproduction and higher mating effort. However, due to sex (...) differences in life history trade-offs between mating and parenting, insecure males tend to adopt avoidant strategies, whereas insecure females tend to adopt anxious/ambivalent strategies, which maximize investment from kin and mates. Females are expected to shift to avoidant patterns when environmental risk is more severe. Avoidant and ambivalent attachment patterns also have different adaptive values for boys and girls, in the context of same-sex competition in the peer group: in particular, the competitive and aggressive traits related to avoidant attachment can be favored as a status-seeking strategy for males. Finally, adrenarche is proposed as the endocrine mechanism underlying the reorganization of attachment in middle childhood, and the implications for the relationship between attachment and sexual development are explored. Sex differences in the development of attachment can be fruitfully integrated within the broader framework of adaptive plasticity in life history strategies, thus contributing to a coherent evolutionary theory of human development. (shrink)

Extrinsic mortality is a key influence on organisms’ life history strategies, especially on age at maturity. This historical longitudinal study of 125 women in rural Domenica examines effects of extrinsic mortality on human age at maturity and pace of reproduction. Extrinsic mortality is indicated by local population infant mortality rates during infancy and at maturity between the years 1925 and 2000. Extrinsic mortality shows effects on age at first birth and pace of reproduction among these women. Parish death records (...) show huge historical variation in age-specific mortality rates. The infant mortality rate (IMR) in the early 1920s was low, increased dramatically beginning in 1929, and reached a maximum in the 1950s, at which point IMR declined steadily to its present low rate. The mortality rate early in life showed a quadratic association with age at first birth. Women who experienced conditions of low IMR early in life reproduced relatively late in life. Those born into moderately high levels of infant mortality tended to reproduce earlier than those born at low levels. At very high infant mortality levels early in life, women went on to delay reproduction until relatively late, possibly as a result of somatic depletion and energetic stress associated with the conditions that lead to high IMR. Population mortality rates at age of maturity also showed a quadratic association with age at first birth. The pace of reproduction, estimated as number of surviving offspring controlled for maternal age, showed a similar quadratic effect. There were complex interactions between population mortality rates in infancy and at maturity. When extrinsic mortality was high during infancy, extrinsic mortality later in life had little effect on timing of first birth. When extrinsic mortality was low to moderate in infancy, extrinsic mortality later in life had significant effects on adult reproduction. I speculate that these effects are mediated through development of personality facets associated with reproduction. (shrink)

Mealey's analysis of secondary sociopathy has much in common with Belsky, Steinberg, and Draper's (1991) evolutionary theory of socialization. Both draw attention to the potential influence of early rearing in the promotion of a cold, detached, manipulative, and opportunistic style of relating to others and, in so doing, raise the question of whether secondary sociopathy represents a facultative reproductive strategy.

The finding that women are attracted to men older than themselves whereas men are attracted to relatively younger women has been explained by social psychologists in terms of economic exchange rooted in traditional sex-role norms. An alternative evolutionary model suggests that males and females follow different reproductive strategies, and predicts a more complex relationship between gender and age preferences. In particular, males' preferences for relatively younger females should be minimal during early mating years, but should become more pronounced (...) as the male gets older. Young females are expected to prefer somewhat older males during their early years and to change less as they age. We briefly review relevant theory and present results of six studies testing this prediction. Study 1 finds support for this gender-differentiated prediction in age preferences expressed in personal advertisements. Study 2 supports the prediction with marriage statistics from two U.S. cities. Study 3 examines the cross-generational robustness of the phenomenon, and finds the same pattern in marriage statistics from 1923. Study 4 replicates Study 1 using matrimonial advertisements from two European countries, and from India. Study 5 finds a consistent pattern in marriages recorded from 1913 through 1939 on a small island in the Philippines. Study 6 reveals the same pattern in singles advertisements placed by financially successful American women and men. We consider the limitations of previous normative and evolutionary explanations of age preferences and discuss the advantages of expanding previous models to include the life history perspective. (shrink)

Del Giudice provides an extension of the life history theory of attachment that incorporates emerging data suggestive of sex differences in avoidant male and preoccupied female attachment patterns emerging in middle childhood. This commentary considers the place of disorganized attachment within this theory and why male children may be more prone to disorganized attachment by drawing on Trivers's parental investment theory.

This target article presents an integrated evolutionary model of the development of attachment and human reproductive strategies. It is argued that sex differences in attachment emerge in middle childhood, have adaptive significance in both children and adults, and are part of sex-specific life history strategies. Early psychosocial stress and insecure attachment act as cues of environmental risk, and tend to switch development towards reproductive strategies favoring current reproduction and higher mating effort. However, due to sex (...) differences in life history trade-offs between mating and parenting, insecure males tend to adopt avoidant strategies, whereas insecure females tend to adopt anxious/ambivalent strategies, which maximize investment from kin and mates. Females are expected to shift to avoidant patterns when environmental risk is more severe. Avoidant and ambivalent attachment patterns also have different adaptive values for boys and girls, in the context of same-sex competition in the peer group: in particular, the competitive and aggressive traits related to avoidant attachment can be favored as a status-seeking strategy for males. Finally, adrenarche is proposed as the endocrine mechanism underlying the reorganization of attachment in middle childhood, and the implications for the relationship between attachment and sexual development are explored. Sex differences in the development of attachment can be fruitfully integrated within the broader framework of adaptive plasticity in life history strategies, thus contributing to a coherent evolutionary theory of human development. (shrink)

We hypothesize that rapid eye movement or REM sleep evolved, in part, to mediate sexual/reproductive behaviors and strategies. Because development of sexual and mating strategies depends crucially on early attachment experiences, we further hypothesize that REM functions to mediate attachment processes early in life. Evidence for these hypotheses comes from (1) the correlation of REM variables with both attachment and sexual/reproductive variables; (2) attachment-related and sex-related hormonal release during REM; (3) selective activation during REM of brain (...) sites implicated in attachment and sexual processes; (4) effects of maternal deprivation on REM; (5) effects of REM deprivation on sexual behaviors; and (6) the REM-associated sexual excitation. To explain why we find associations among REM sleep, attachment, and adult reproductive strategies, we rely on recent extensions of parent-offspring conflict theory. Using data from recent findings on genomic imprinting, Haig (2000) and others suggest that paternally expressed genes are selected to promote growth of the developing fetus/child at the expense of the mother, while maternally expressed genes counter these effects. Because developmental REM facilitates attachment-related outcomes in the child, developmental REM may be regulated by paternally expressed genes. In that case, REM may have evolved to support the “aims” of paternal genes at the expense of maternal genes. (shrink)

Household structure may have strong effects on reproduction. This study uses household demographic data for 59 women in a Caribbean village to test evolutionary hypotheses concerning variation in reproductive strategies. Father-absence during childhood, current household composition, and household economic status are predicted to influence age at first birth, number of mates, reproductive success, and pair-bond stability. Criterion variables did not associate in a manner indicative of r- and K-strategies. Father-absence in early childhood had little influence on (...) subsequent reproduction. Household wealth and alloparenting were positively associated with age at first birth. Alloparenting was negatively associated with reproductive success. Women in long-term conjugal unions had higher reproductive success than did single women. Number of adult male kin resident in the household was negatively associated with women’s number of mates. (shrink)

Del Giudice's model belongs among those that highlight the role of adaptive developmental plasticity in human reproductive strategies; but at least three other forms of evolutionary adaptation also influence reproductive behavior. Similar to earlier models, the existing evidence suggests that Del Giudice's hypothesized effects are rather weak. In particular, adult attachment styles are hardly predictive of outcomes visible to natural selection.

Del Giudice's model of sex-specific attachment patterns demonstrates the usefulness of infusing life history theory with principles of sexual selection. We believe a full synthesis between the two theories provides a foundation for a comprehensive model of alternative reproductive strategies. We extend Del Giudice's ideas based on our own program of research, focusing specifically on the importance of intrasexual competition and the individual phenotype during development.

Women's preference for symmetrical men need not have evolved as part of a good gene sexual selection (GGSS) reproductive strategy employed during recent human evolutionary history. It may be a remnant of the reproductive strategy of a perhaps promiscuous species which existed prior to the divergence of the human line from that of the bonobo and chimp.

Research with nonhuman primates can make important contributions to life history models of human attachment and reproductive strategies, such as: including parental responsiveness into female reproductive strategies, testing the assumption that adult attachment is a reproductive adaptation, assessing genetic and environmental effects on attachment and reproduction, and investigating the mechanisms through which early stress results in accelerated reproductive maturation.

British marriage statistics suggest that women of breeding age choose young men. Women past breeding age who could still be raising children extend choices to include older men. After this, women do not marry. The choices of men over 50 are restricted to women between 40 and 55: past breeding but young enough to be raising children; the few men over 50 that marry choose women in this age range.

Reproduction, a basic property of biological life, entails costs for an organism, ultimately detectable as reduction in survival prospects. Telomeres are an excellent candidate biomarker for explaining these reproductive costs, because their shortening correlates with increased mortality risk. For similar reasons, telomeres are perceived as biomarkers of individual “quality.” The relationship between reproduction and telomere dynamics is reviewed, emphasizing that cost and quality perspectives, commonly presented in isolation, should be integrated. While a majority of correlative studies have confirmed the (...) relationship between telomere dynamics and various reproductive outputs, only limited experimental support exists showing that reproduction causes telomeres to shorten. A shift of focus to experimental manipulations of reproductive effort/telomere dynamics is crucial. However, the observation of survival reduction in response to these manipulations is essential for establishing telomeres as genuine biomarkers, allowing to unravel trade‐offs related to reproduction. (shrink)

In Brazil, abortion is only allowed in cases of rape, serious risk to a woman's life or fetal anecephaly. Legal abortion services cover less than 4% of the Brazilian territory and only 1,800 procedures are performed, in average, per year. During the COVID‐19 pandemic, almost half of the already few Brazilian abortion clinics shut down and women had to travel even longer distances, reaching abortion services at later gestational ages. In this paper, we describe three bottom‐up advocacy strategies that (...) emerged from difficulties deepened during the COVID‐19 pandemic at a single abortion service in Brazil, amidst anti‐gender policies from the federal government. Telemedicine abortion, outpatient surgical abortion and the provision of abortion after 20 weeks' gestation are important strategies that may reduce inequalities that impact the most vulnerable populations, such as black and indigenous women, children, adolescents and women experiencing domestic violence. (shrink)

Reproduction is central to biology and evolution. Standard concepts of reproduction are drawn from animals. Nonstandard examples of reproduction can be found in unicellular eukaryotes that distribute their reproductive strategies across multiple generations, and in mutualistic systems that combine different modes of reproduction across multiple lineages. Examining multigenerational and multilineal reproducers and how they align fitness has implications for conceptualizing units of evolution.

This paper provides an analysis of the complex global reproduction networks driving the rapidly expanding cross-border surrogacy industry in Asia’s reproductive bioeconomy. It sheds light on the unique features of informal surrogacy networks, notable for their flexible business ties and non-standardized surrogate mother recruitment. These factors contribute to heightened vulnerability for surrogate mothers operating within these networks. While previous literature has underscored the merits of labor law in regulating the surrogacy industry, its application in informal cross-border surrogacy remains under-examined. (...) To address this gap, this research delves into innovative labor law strategies with potential to better regulate the surrogacy sector. Drawing inspiration from progressive labor regulations and supply chain strategies in Bulgaria and Australia, the proposed model aims to redefine the traditional employment relationship. This shift is aimed at bolstering protection for surrogate mothers and enforcing accountability throughout the surrogacy business network. The model further advocates for a collective framework that fosters collaboration and mandates the documentation and registration of surrogacy contracts. Moreover, it underscores the critical significance of international collaboration in bridging regulatory gaps and distributing accountability across consumer and supply states. (shrink)

: This article critically examines the constitution of impairment in prenatal testing and screening practices and various discourses that surround these technologies. While technologies to test and screen prenatally are claimed to enhance women's capacity to be self-determining, make informed reproductive choices, and, in effect, wrest control of their bodies from a patriarchal medical establishment, I contend that this emerging relation between pregnant women and reproductive technologies is a new strategy of a form of power that began to (...) emerge in the late eighteenth century. Indeed, my argument is that the constitution of prenatal impairment, by and through these practices and procedures, is a widening form of modern government that increasingly limits the field of possible conduct in response to pregnancy. Hence, the government of impairment in utero is inextricably intertwined with the government of the maternal body. (shrink)

Reproductive tourism is a manifestation of a larger, more inclusive trend toward globalization of capitalist cultural and material economies. This paper discusses the development of cross-border assisted reproduction within the globalized economy, transnational and local structural processes that influence the trade, social relations intersecting it, and implications for the healthcare systems affected. I focus on prevailing gender structures embedded in the cross-border trade and their intersection with other social and economic structures that reflect and impact globalization. I apply a (...) social connection model of responsibility for unjust outcomes and consider strategies to counter structural injustices embedded in this industry. The concluding section discusses policy reforms and proposals for collaborative action to preclude further injustices and extend full human rights to all. (shrink)

Studies of the association between wealth and fertility in industrial populations have a rich history in the evolutionary literature, and they have been used to argue both for and against a behavioral ecological approach to explaining human variability. We consider that there are strong arguments in favor of measuring fertility (and proxies thereof) in industrial populations, not least because of the wide availability of large-scale secondary databases. Such data sources bring challenges as well as advantages, however. The purpose of this (...) article is to illustrate these by examining the association between wealth and reproductive success in the United States, using the National Longitudinal Study of Youth 1979. We conduct a broad-based exploratory analysis of the relationship between wealth and fertility, employing both cross-sectional and longitudinal approaches, and multiple measures of both wealth (income and net worth) and fertility (lifetime reproductive success and transitions to first, second and third births). We highlight the kinds of decisions that have to be made regarding sample selection, along with the selection and construction of explanatory variables and control measures. Based on our analyses, we find a positive effect of both income and net worth on fertility for men, which is more pronounced for white men and for transitions to first and second births. Income tends to have a negative effect on fertility for women, while net worth is more likely to positively predict fertility. Different reproductive strategies among different groups within the same population highlight the complexity of the reproductive ecology of industrial societies. These results differ in a number of respects from other analyses using the same database. We suggest this reflects the impossibility of producing a definitive analysis, rather than a failure to identify the “correct” analytical strategy. Finally, we discuss how these findings inform us about (mal)adaptive decision-making. (shrink)

In this commentary, we attempt to broaden thinking and dialogue about how our ancestral past might have affected attachment and reproductive strategies. We highlight the theoretical benefits of formulating specific predictions of how different sources of stress might impact attachment and reproductive strategies differently, and we integrate some of these ideas with another recent evolutionary model of human mating.

We conducted the largest multiple-iteration retelling study to date (12,840 participants and 19,086 retellings) with two different studies that test how emotional appraisals are transmitted across retellings. We use a novel Bayesian model that tracks changes across retellings. Study 1 examines the preservation of appraisals of happy and sad stories and finds that retellings preserve the story’s degree of happiness and sadness even when length shrinks and aspects of story coherence and rationalisation deteriorate. Study 2 compared the transmission of appraisals (...) of happiness and sadness with embarrassment, disgust, and risk. Appraisals of happiness, sadness, and also embarrassment showed high appraisal preservation, while disgust and risk were not well preserved. We conclude that participants in our studies encoded happy and sad stories by encapsulating the events and details into an overall emotional appraisal of the story and that this processing strategy might also apply to stories involving other emotions like embarrassment. The emotional appraisal played a key role in retelling by helping to guide the selection, invention, and ordering of the story elements. Hence, we posit that emotion appraisals can operate as anchors for remembering and retelling stories, thus playing an important role in narrative communication. (shrink)

The Canadian province of Quebec recently amended its Health Insurance Act to cover the costs of In Vitro Fertilization . The province of Ontario recently de-insured IVF. Both provinces cited cost-effectiveness as their grounds, but the question as to whether a public health insurance system ought to cover IVF raises the deeper question of how we should understand reproduction at the social level, and whether its costs should be a matter of individual or collective responsibility. In this article I examine (...) three strategies for justifying collective provisions in a liberal society and assess whether public reproductive assistance can be defended on any of these accounts. I begin by considering, and rejecting, rights-based and needs-based approaches. I go on to argue that instead we ought to address assisted reproduction from the perspective of the contractarian insurance-based model for public health coverage, according to which we select items for inclusion based on their unpredictability in nature and cost. I argue that infertility qualifies as an unpredictable incident against which rational agents would choose to insure under ideal conditions and that assisted reproduction is thereby a matter of collective responsibility, but only in cases of medical necessity or inability to pay. The policy I endorse by appeal to this approach is a means-tested system of coverage resembling neither Ontario nor Quebec's, and I conclude that it constitutes a promising alternative worthy of serious consideration by bioethicists, political philosophers, and policy-makers alike. (shrink)

This paper proposes that mammals exhibit three primary emotion categories for mating and reproduction: (1) the sex drive, or lust, characterized by the craving for sexual gratification; (2) attraction, characterized by increased energy and focused attention on one or more potential mates, accompanied in humans by feelings of exhilaration, “intrusive thinking” about a mate, and the craving for emotional union with this mate or potential mate; and (3) attachment, characterized by the maintenance of close social contact in mammals, accompanied in (...) humans by feelings of calm, comfort, and emotional union with a mate. Each emotion category is associated with a discrete constellation of neural correlates, and each evolved to direct a specific aspect of reproduction. The sex drive is associated primarily with the estrogens and androgens; it evolved to motivate individuals to seek sexual union. The attraction system is associated primarily with the catecholamines; it evolved to facilitate mate choice, enabling individuals to focus their mating effort on preferred partners. The attachment system is associated primarily with the peptides, vasopressin, and oxytocin; it evolved to motivate individuals to engage in positive social behaviors and assume species-specific parental duties.During the evolution of the genus Homo, these emotion systems became increasingly independent of one another, a phenomenon that contributes to human mating flexibility and the wide range of contemporary human mating and reproductive strategies. (shrink)

The target article effectively assesses multiple hypotheses for human sexuality, demonstrating support for a complex, integrated perspective. However, care must be taken when extrapolating human universal patterns from specific cultural subsets without appropriate ethnographic contexts. Although it makes a strong contribution to the investigation of human sexuality, the basal reliance on a reductionist perspective constrains the full efficacy of this research.

A growing number of infertile couples and other individuals desiring children are seeking to fulfill their desire for parenthood transnationally through the use of donor gametes and a surrogate. The number of “fertility tourists” from developed countries to low-income countries is growing phenomenally. Indian women, too, are participating as producers in these “biocrossings,” turning India into the surrogacy outsourcing capital of the world in the globalized bioeconomy of assisted reproduction. I argue for a ban on commercial egg donation and surrogacy (...) and a social-justice approach that would hold the state responsible for providing basic social goods to low-income households. I also argue for a gender-justice approach so that women would not be compelled to adopt surrogacy as a strategy for survival and upward social mobility. (shrink)

Using questionnaire data completed by 170 men, we examine variation in paternal investment in relation to the trade-off between mating and parenting. We found that as men’s self-perceived mate value increases, so does their mating effort, and in turn, as mating effort increases, paternal investment decreases. This study also simultaneously examined the influence on parental investment of men’s mating effort, men’s perception of their mates’ fidelity, and their perceived resemblance to their offspring. All predicted investment. The predictors of investment are (...) also tested independently for men who are still in a relationship with the mother of their children and those that are separated from her. Finally we examine how self-perceived mate value affects how men respond to variation in paternity confidence. Men with a self-perceived low mate value were less likely to respond to lowered mate fidelity by reducing their parental investment compared with men with a self-perceived high mate value. (shrink)

RESUMEN La educación médica superior tiene la responsabilidad social de formar educandos autónomos, independientes y autorregulados. Por ello las estrategias de aprendizaje permiten la adquisición de información y el establecimiento de relaciones a partir del conocimiento previo; son procesos de toma de decisiones, consciente e intencional. Objetivo: Exponer las necesidades del desarrollo de estrategias de aprendizaje en los estudiantes de primer año de Estomatología. Método: Se realizó una investigación descriptiva transversal. El universo estuvo constituido por los estudiantes de 1er año (...) de la carrera de Estomatología, del que fueron seleccionados 120 educandos que conformaron la muestra y a los que se les aplicó la Escala de Estrategias de Aprendizaje ACRA-Abreviada para alumnos universitarios. Los datos fueron procesados utilizando la estadística descriptiva. Resultados: Las estrategias que más utilizan son las que los llevan a un aprendizaje memorístico y reproductivo, las estrategias de apoyo al aprendizaje son utilizadas por el 47.79% de los educandos y existen inadecuados hábitos de estudios. Discusión: El estudio permitió corroborar que las insuficiencias que presentan los estudiantes en cuanto al uso de estrategias de aprendizaje son similares a las descritas por los autores consultados. ABSTRACT The high medical education has the social responsibility of forming autonomous, independent and auto-regulated pupils. For it the learning strategies allow the acquisition of information and the relations establishment from the previous knowledge; there are processes of decision making, conscious and intentional. Objective: To exhibit the needs for the development of strategies of learning in the students of the first year of Stomatology. Method: A transverse descriptive investigation was carried out. The universe was constituted by the students of 1st year of the career of Dentistry, of which there were selected 120 pupils who shaped the sample and to whom there was applied the Scale of Strategies of Learning ACRA-Abbreviated for university pupils. The information was processed using the descriptive statistics. Results: The strategies that they use more are those which take them to memory and reproductive learning, the support strategies to learning are used by 47.79 % of the pupils and inadequate studies habits exist. Discussion: The study allowed to corroborate that the insufficiencies that the students present as for the use of strategies of learning are similar to the described ones by the consulted authors. (shrink)

Abstract:This essay reviews the 2013 Human Life International (HLI) propaganda video, Central America and Mexico: Fighting for Life, Faith, and Family, which, we argue, illustrates the well-orchestrated counteroffensive against reproductive and sexual rights movements occurring in the region. First we summarize the film's key themes, including the assertion that Catholicism is fundamental to Mexican and Central American identities and that the international “pro-abortion movement” is waging war against Catholics. Second, we note the development of a new strategic alliance between (...) Catholics and evangelicals that relies on lay religious activists working in the fields of medicine, bioethics, law, and government. Third, we show how the video appeals to HLI donors by asking them to support crisis pregnancy centres, homes for unwed mothers, adoption programs, and “natural” fertility assistance. We argue that the film conspicuously ignores the consequences of abortion bans already in place in Nicaragua, El Salvador, and Honduras, and does not consider that what it terms “international pressures” also includes treaty obligations with the United Nations and Organization of American States. This essay offers insights into the strategies used by opponents of reproductive and sexual rights movements in Mexico and Central America. (shrink)

This study examines the socioeconomic and familial background of Irish Catholic priests born between 1867 and 1911. Previous research has hypothesized that lack of marriage opportunities may influence adoption of celibacy as part of a religious institution. The present study traced data from Irish seminary registries for 46 Catholic priests born in County Limerick, Ireland, using 1901 Irish Census returns and Land Valuation records. Priests were more likely to originate from landholding backgrounds, and with landholdings greater in size and wealth (...) than the local average. Priests were found to originate from families with more sons than the national average, but with similar numbers of daughters. These findings are discussed in relation to competition for resources and lineage survival strategies. (shrink)

The welfare mother is a powerful symbol of the supposed irresponsible, sexually promiscuous, and immoral behavior of the poor. Resting on dominant ideologies of race, class, and gender, the welfare mother suggests not a poor mother but a bad mother. Based on interviews with 34 mothers receiving public assistance, this article explores how women receiving assistance claim for themselves an identity as good mothers by defining the appropriate responsibilities of mothers to prioritize, protect, discipline, provide for, and spend time with (...) their children. The material realities of poverty combined with work requirements now attached to public assistance exacerbate contradictions between these roles and create difficulties for these mothers. This article explores these contradictions and examines the possibilities for and limits of their use as resistance strategies. (shrink)

The wealthy elite males of nineteenth-century Krummhörn (Ostfriesland, Germany) achieved an above-average reproductive success. Membership in the elite class was determined from a list of the 300 richest men in the Ostfriesland district compiled by authorities in 1812. The main components establishing the link between cultural success and reproductive success aredifferences in the number of offspring owing to differences both in time spent in fecund marriage (mating success) and in rate of reproduction;differences in the probabilities of one’s adult (...) offspring marrying locally vs. emigrating unmarried owing to differential ability to allocate resources that enhance the “social placement” of adult offspring; anddifferences in the probability of total reproductive failure (lineage extinction).Contrary to what might be expected, infant survivorship was lowest amongst the richest families. We conclude that to a great extent females’ reproductive decisions contribute to the greater reproductive success of the elite males. (shrink)

Both behavioral ecological and social anthropological analyses of polygynous marriage tend to emphasize the importance of competition among men in acquisition of mates, whereas the strategic options to women both prior to and after the establishment of a marriage have been neglected. Focusing on African marriage systems that are in some senses analogous to resource-defense polygyny, I first review the evidence of reproductive costs of polygyny to women. Then I discuss why the conflict of interests between men and women (...) over mate number is often likely to be settled in favor of men. Using East African ethnographic data I examine the strategic responses of women and their families to polygynous marriage, focusing on four topics: mate choice (Kipsigis), attitudes toward incoming wives (Kipsigis), labor allocation and cooperation (comparative data, Kipsigis), and use of parental wealth (Datoga). The results of these quantitative analyses suggest that through a combination of judicious marriage choice and strategic responses within marriage, polygyny need not be costly to women in resource-defense polygynous systems. The conclusion is that a hierarchy of questions need to be addressed in the analysis of any polygynous marriage system. (shrink)

Reproductive technologies do not allow us to choose future people, but they do change who will exist. Confusion arises because of the different senses in which ”identity’ is used in ethical debate. I distinguish qualitative, cultural, and numerical identity. Reproductive choices do impact the qualitative features of children in ways that affect wellbeing, both directly and indirectly via cultural identification. I explain how the nonidentity problem makes it difficult to say what, if anything, is wrong with risky (...) class='Hi'>reproductive choices, and I outline four strategies or responding to the non-identity problem. (shrink)