Following from life history and attachment theory, individuals are predicted to be sensitive to variation in environmental conditions such that risk and uncertainty are internalized by cognitive, affective, and psychobiological mechanisms. In turn, internalizing of environmental uncertainty is expected to be associated with attitudes toward risk behaviors and investments in education. Native American youth aged 10–19 years (n = 89) from reservation communities participated in a study examining this pathway. Measures included family environmental risk and uncertainty, present and future (...) time perspective, adolescent attachment, attitudes toward risk, investments in education, and salivary cortisol. Results support the idea that environmental risk and uncertainty are internalized during development. In addition, internalizing mechanisms significantly predicted attitudes toward risk and education: (1) lower scores on future time perspective and higher cortisol predicted higher scores on risk attitudes, and (2) higher scores on future time perspective and lower scores on problems with attachment predicted higher self-reported school performance. Gender differences were seen, with males anticipating a shorter lifespan than females, which predicted higher scores on risk attitudes and lower school performance. Implications for research on adolescent problem behavior and academic achievement are discussed. (shrink)

This article introduces a new model of the relationship between growth and learning and tests a set of hypotheses related to the development of adult competency using time allocation, anthropometric, and experimental task performance data collected between 1992 and 1997 in a multiethnic community in the Okavango Delta, Botswana. Building on seminal work in life history theory by Hawkes, Blurton Jones and associates, and Kaplan and associates, the punctuated development model presented here incorporates the effects of both growth and (...) learning constraints on age-specific task performance. In addition, the payoff to investment in two forms of embodied capital, growth-based and learning-based, are examined in relation to features of the socioecology, including subsistence economy and family composition.The three main findings are:The development of adult competency in specific tasks entails a steplike relationship between growth- and experience-based forms of embodied capital in the ontogeny of ability acquisition.There is a trade-off between the acquisition of experience-based embodied capital in the form of skills and knowledge and immediate productivity among children. Time allocation to these alternatives is primarily determined by the short- and long-term costs and benefits to parents of investment in children’s embodied capital.The availability of laborers and the overall labor requirements of the household are major determinants of investment in alternate forms of embodied capital and resulting variation in children’s time allocation. The value of children’s labor to their parents is dependent upon the opportunity costs to engaging in other activities not only for the child in question but also for potential substitute laborers.These results have important implications for our understanding of the role of growth and learning in the evolution of the human juvenile period, as well as for our understanding of cross-cultural variation in child growth and development and patterns of work and play. (shrink)

Sex differences in mortality rates stem from genetic, physiological, behavioral, and social causes that are best understood when integrated in an evolutionary life history framework. This paper investigates the Male-to-Female Mortality Ratio (M:F MR) from external and internal causes and across contexts to illustrate how sex differences shaped by sexual selection interact with the environment to yield a pattern with some consistency, but also with expected variations due to socioeconomic and other factors.

Aspects of human life history and cognition, such as our long childhoods and extensive use of teaching, theoretically evolved to facilitate the acquisition of complex tasks. The present paper empirically examines the relationship between subsistence task difficulty and age of acquisition, rates of teaching, and rates of oblique transmission among Hadza and BaYaka foragers from Tanzania and the Republic of Congo. We further examine cross-cultural variation in how and from whom learning occurred. Learning patterns and community perceptions of task (...) difficulty were assessed through interviews. We found no relationship between task difficulty, age of acquisition, and oblique transmission, and a weak but positive relationship between task difficulty and rates of teaching. While same-sex transmission was normative in both societies, tasks ranked as more difficult were more likely to be transmitted by men among the BaYaka, but not among the Hadza, potentially reflecting cross-cultural differences in the sexual division of subsistence and teaching labor. Further, the BaYaka were more likely to report learning via teaching, and less likely to report learning via observation, than the Hadza, possibly owing to differences in socialization practices. (shrink)

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. (shrink)

Evolutionary Life History Theory (LHT) is a powerful framework that can be used for understanding behavioral strategies as contingent adaptations to environmental conditions. Del Giudice uses LHT as a foundation for describing the attachment process as an evolved psychological system which evaluates life conditions and chooses reproductive strategies appropriate in the developmental environment, integrating findings across several literatures.

Guided by principles of life history strategy development, this study tested the hypothesis that sexual precocity and violence are influenced by sensitivities to local environmental conditions. Two models of strategy development were compared: The first is based on indirect perception of ecological cues through family disruption and the second is based on both direct and indirect perception of ecological stressors. Results showed a moderate correlation between rates of violence and sexual precocity (r = 0.59). Although a model incorporating direct (...) and indirect effects provided a better fit than one based on family mediation alone, significant improvements were made by linking some ecological factors directly to behavior independently of strategy development. The models support the contention that violence and teenage pregnancy are part of an ecologically determined pattern of strategy development and suggest that while the family unit is critical in affecting behavior, individuals’ direct experiences of the environment are also important. (shrink)

Life history theory in biology helps prompt the question: Does literature reflect the different phases of human life history equally? And if not, why not? i suggest that it does not. The centrality of sexual love and violent death in literature reflects the two key factors in biological evolution: reproduction and survival. But the very familiarity of these themes poses risks for storytellers. since nothing makes for more arresting unpredictability than conflicting motives in active opposition, stories tend to (...) focus disproportionately on conflicts of wills around love (mate choice and retention) and death (social oppositions and transgressions). Shakespeare’s The Winter’s Tale offers an illuminating example. (shrink)

Language, like other human traits, could only have evolved during one or more stages of development. We enlist the theoretical framework of human life history to account for certain aspects of linguistic evolution, with special reference to initial phases in the process. It is hypothesized that selection operated at several developmental stages, the earlier ones producing new behaviors that were reinforced by additional, and possibly more powerful, forms of selection during later stages, especially adolescence and early adulthood. Peer commentaries (...) have provided opportunities to explain human life history more comprehensively, and to add details to our account of spoken language. We made no attempt to explain syntax in the target article, but we propose here that selection for “vocal plumage” may have increased our species’ capacity for utterance complexity, a development that would have benefited all levels of language. (shrink)

A secondary analysis was performed on preliminary data from an ongoing cross-cultural study on assortative pairing. Independently sampled pairs of opposite-sex romantic partners and of same-sex friends rated themselves and each other on Life History (LH) strategy and mate value. Data were collected in local bars, clubs, coffeehouses, and other public places from three different cultures: Tucson, Arizona; Hermosillo, Sonora; and San José, Costa Rica. The present analysis found that slow LH individuals assortatively pair with both sexual and social (...) partners more strongly than fast LH individuals. We interpret this phenomenon as representing (1) an adaptation for preserving coadapted genomes in slow LH strategists to maintain high copying fidelity genetic replication while producing a lower number of offspring in stable, predictable, and controllable environments and (2) a bet-hedging adaptation in fast LH strategists, favoring the genetic diversification of a higher number of offspring in unstable, unpredictable, and uncontrollable environments. (shrink)

Baumard's new explanation of the Industrial Revolution shows that Life History Theory holds great potential. Here, I suggest two related hypotheses for examination. One is that there are long-term roots of slow life traits and preferences. The other is that Life History Theory can explain other aspects of economic modernity such as the Scientific Revolution and bureaucratic states. If so, then Life History Theory offers a way to reconcile several bodies of evidence and lines of explanation (...) into a coherent general account of economic modernity. (shrink)

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.

Although scientific interest in facial attractiveness has developed substantially in recent years, few studies have contributed to our understanding of the ontogeny of facial preferences. In this study, attractiveness of 30 male faces was evaluated by four female groups: girls at puberty, nonpregnant and pregnant young women, and middle-aged women. The main findings are as follows: (1) Preference for sexy-looking faces was strongest in young, nonpregnant women. (2) Biologically more mature girls displayed more adultlike preferences. (3) The intragroup consistency for (...) postmenopausal women was relatively low. (4) In terms of the preference pattern, pregnant women were more similar to perimenopausal women than they were to their nonpregnant peers. (5) Preference for youthful appearance decreased with the age of the women. I argue that the life history of female preferences for male faces is, to a large extent, hormone-driven and underpinned by a set of evolutionary adaptations. (shrink)

Previous theoretical accounts have predicted that warfare and intergroup conflict are environmental factors that contribute to the emergence of a fast life-history strategy. However, this assumption has never been directly empirically tested. We examined youth who grew up in a territory that experienced violent intergroup conflict and compared them with a control group on various life-history measures: age of first sexual intercourse, mating behavior, desired timing of marriage and first reproduction and desired number of children. We also measured (...) other characteristics to explore the congruence between them and exposure to conflict. Participants from the postconflict society showed indications of faster life-history strategy: greater mating effort, a tendency to marry and have their first child sooner, and a larger desired number of children. Furthermore, interactions between exposure to conflict and participants’ sex were found: females from a postconflict society want to have their child earlier, and males have elevated short-term mating success. Finally, the exposure to violent conflict turned out to have congruent effects with economic poverty but not troublesome family relations. The findings are in accordance with life-history theory and show the adaptiveness of human behavior related to fitness optimization in hostile and dangerous environments. (shrink)

In order to address why the number of patients suffering from anxiety and depression are seemingly exploding in Western, educated, industrialized, rich, and democratic (WEIRD) countries, it is sensible to look at the evolution of human fearfulness responses. Here, we draw on Veit's pathological complexity framework to advance Grossmann's goal of re-characterizing human fearfulness as an adaptive trait.

On the basis of experiences in pastoral hospital care, the relationship between disease, sin, and guilt in the life of patients is explored. Against the disregard of this subject in medicine, and even in most of pastoral care, it is argued that patients' interest requires that their hidden or manifest questions be addressed, rather than their being exposed to efforts at “helping” through mere attempts at “debt clearance.” Only by openly confronting sin and guilt can the patient be taken (...) seriously in his role as subject of his disease. Theological and anthropological background considerations revealing the essence of sin as a disruption or even destruction of the Divine gift of life in its realization through a lived relationship to God and other humans are offered as evidence for this claim. (shrink)

Baumard proposes that life history slowing in populations over time is the principal driver of innovation rates. We show that this is only true of micro-innovation rates, which reflect cognitive and economic specialization as an adaptation to high population density, and not macro-innovation rates, which relate more to a population's level of general intelligence.

The most general theory of life history evolution, that of r versus K selection, implies that innovation in the form of plasticity is more likely to be adaptive under poor rather than good resource conditions, the opposite of how Baumard has it. However, this does focus on benefits rather than costs, and including both allows for greater diversity of outcomes.

The National Longitudinal Study of Adolescent Health data were used to test predictions from life history theory. We hypothesized that (1) in young adulthood an emerging life history strategy would exist as a common factor underlying many life history traits (e.g., health, relationship stability, economic success), (2) both environmental harshness and unpredictability would account for unique variance in expression of adolescent and young adult life history strategies, and (3) adolescent life history traits would predict young (...) adult life history strategy. These predictions were supported. The current findings suggest that the environmental parameters of harshness and unpredictability have concurrent effects on life history development in adolescence, as well as longitudinal effects into young adulthood. In addition, life history traits appear to be stable across developmental time from adolescence into young adulthood. (shrink)

This paper presents an analysis of the characteristics of men who become stepfathers, and their subsequent fertility patterns and lifetime reproductive success. Because women who already have children are ranked lower in the marriage market than women without children, men who marry women with children (e.g., stepfathers) are likely to have lower rankings in the marriage market as well. Using retrospective fertility and marital histories from the Panel Study of Income Dynamics (PSID), I show that men who become stepfathers have (...) lower levels of education, less income, and are more likely to have been divorced before and to already have children, all characteristics that lower their rankings in the marriage market. Men with one or two stepchildren are just as likely to have children within a marriage as non-stepfathers, although men with three stepchildren show decreased fertility. Among men age 45 and older, stepfathers have lower lifetime fertility than non-stepfathers, although the difference disappears when men’s age at first marriage is controlled for. Additionally, stepfathers have significantly higher fertility than men who never marry. The results suggest that some men become stepfathers to procure mates and fertility benefits that they would otherwise have been unlikely to obtain; for these men, raising other men’s children serves as a form of mating effort. (shrink)

Life history theory predicts that greater extrinsic mortality will lead to earlier and higher fertility. To test this prediction, I examine the relationship between life expectancy at birth and several proxies for life history traits (ages at first sex and first marriage, total fertility rate, and ideal number of children), measured for both men and women. Data on sexual behaviors come from the Demographic and Health Surveys (DHS). Two separate samples are analyzed: a cross-sectional sample of 62 (...) countries and a panel sample that includes multiple cross-sectional panels from 48 countries. Multivariate regression analysis is used to control for potential confounding variables. The results provide only partial support for the predictions, with greater support among women than men. However, the prediction is not supported in sub-Saharan African countries, most likely owing to the nonequilibrium conditions observed in sub-Saharan Africa with respect to life expectancy. The applicability of the model to understanding HIV/AIDS risk behaviors is discussed. (shrink)

It has long been claimed that Homo sapiens is the only species that has language, but only recently has it been recognized that humans also have an unusual pattern of growth and development. Social mammals have two stages of pre-adult development: infancy and juvenility. Humans have two additional prolonged and pronounced life history stages: childhood, an interval of four years extending between infancy and the juvenile period that follows, and adolescence, a stage of about eight years that stretches from (...) juvenility to adulthood. We begin by reviewing the primary biological and linguistic changes occurring in each of the four pre-adult ontogenetic stages in human life history. Then we attempt to trace the evolution of childhood and juvenility in our hominin ancestors. We propose that several different forms of selection applied in infancy and childhood; and that, in adolescence, elaborated vocal behaviors played a role in courtship and intrasexual competition, enhancing fitness and ultimately integrating performative and pragmatic skills with linguistic knowledge in a broad faculty of language. A theoretical consequence of our proposal is that fossil evidence of the uniquely human stages may be used, with other findings, to date the emergence of language. If important aspects of language cannot appear until sexual maturity, as we propose, then a second consequence is that the development of language requires the whole of modern human ontogeny. Our life history model thus offers new ways of investigating, and thinking about, the evolution, development, and ultimately the nature of human language. (shrink)

A critique of--and alternative to--pure narrative approaches to life-history, offered by a distinguished Hungarian philospher.

Much existing literature in anthropology suggests that teaching is rare in non-Western societies, and that cultural transmission is mostly vertical (parent-to-offspring). However, applications of evolutionary theory to humans predict both teaching and non-vertical transmission of culturally learned skills, behaviors, and knowledge should be common cross-culturally. Here, we review this body of theory to derive predictions about when teaching and non-vertical transmission should be adaptive, and thus more likely to be observed empirically. Using three interviews conducted with rural Fijian populations, we (...) find that parents are more likely to teach than are other kin types, high-skill and highly valued domains are more likely to be taught, and oblique transmission is associated with high-skill domains, which are learned later in life. Finally, we conclude that the apparent conflict between theory and empirical evidence is due to a mismatch of theoretical hypotheses and empirical claims across disciplines, and we reconcile theory with the existing literature in light of our results. (shrink)

Del Giudice addresses a complex and pertinent theoretical issue: the evolutionary adaptiveness of sex differences in attachment styles in relation to life history strategy. Although we applaud Del Giudice for calling attention to the problem, we regret that he does not sufficiently specify how attachment styles serve as an integral part of a coordinate life history strategy for either sex.

This paper critiques the competing “Grandmother Hypothesis” and “Embodied Capital Theory” as evolutionary explanations of the peculiarities of human life history traits. Instead, I argue that the correct explanation for human life history probably involves elements of both hypotheses: long male developmental periods and lives probably evolved due to group selection for male hunting via increased female fertility, and female long lives due to the differential contribution women’s complex foraging skills made to their children and grandchildren’s nutritional status (...) within groups provisioned by male hunting. (shrink)

Matrix population models provide a natural tool to analyse state-dependent life-history strategies. Reproductive value and the intrinsic rate of natural increase under a strategy, and the optimal life-history strategy can all be easily characterised using projection matrices. The resultant formulae, however, are not directly comparable with the corresponding formulae for age structured populations such as Lotka's equations and Fisher's formula for reproductive value. This is because formulae involving projection matrices lose track of what happens to an individual over (...) its lifetime and are only concerned with expected numbers of descendants one time step in the future. In contrast the usual age-dependent formulae explicitly followed a single individual through from birth to death.In this paper I show how the state-dependent formulae can be rewritten to be directly comparable with the standard age-structured formulae. Although the formulae are intuitively obvious the decomposition into current and future reproductive success differs from that previously given and is, I suggest, a more natural definition. The derivation of appropriate equations for optimal life-histories relies on results from dynamic programming theory; and is much more general and easier than previous derivations. (shrink)

Brain size has increased threefold during the course of human evolution, whilst body weight has approximately doubled. These increases in brain and body size suggest that reproductive rates must have slowed considerably during this period. During the same period, however, environmental heterogeneity has increased substantially. A central tenet of life-history theory states that in heterogeneous environments, organisms with fast life histories will be favoured. The human lineage, therefore, has proceeded in direct contradiction of this theory. This contribution attempts (...) to resolve this contradiction by recourse to Godfrey-Smith’s Environmental Complexity Thesis, which states that the function of cognition is to enable the organism to deal with environmental complexity. It is suggested that among slowly reproducing organisms the behavioural flexibility provided by advanced cognitive abilities is a fundamental component of adaptation to heterogeneous environments. In the human lineage this flexibility is manifest particularly in the increasing complexity of material culture. (shrink)

Baumard proposes a model to explain the dramatic rise in innovation that occurred during the Industrial Revolution, whereby rising living standards led to slower life history strategies, which, in turn, fostered innovation. We test his model explicitly using time series data, finding limited support for these proposed linkages. Instead, we find evidence that rising living standards appear to have a time-lagged bidirectional relationship with increasing innovation.

The questions raised for the study of marine invertebrate larvae have implications for the evolution of development, the life histories of animals, and life in the sea more generally. These questions began to coalesce in the 19th century around two main factors. The first was the discovery of marine larvae. Through careful observation, investigators detected and confirmed that the development of animals exhibited stages surprisingly different from the previously known adults and adult-like juveniles. Famous examples include the demonstration (...) that barnacles were arthropods because of a shared larval form (Thompson 1830), the characterization of bilateral echinoderm larvae by Johannes Müller (summarized in Huxley 1851), and the unexpected chordate affinities of tunicates. Subsequent studies also demonstrated that adults with similar morphological features could have radically different larval forms and life histories. (shrink)

Reproductive division of labor has been proposed to play a key role for evolutionary transitions in individuality (ETIs). This chapter provides a guide to a theoretical model that addresses the role of a tradeoff between life-history traits in selecting for a reproductive division of labor during the transition from unicellular to multicellular organisms. In particular, it focuses on the five key assumptions of the model, namely (1) fitness is viability times fecundity; (2) collective traits are linear functions of their (...) cellular counterparts; (3) there is a tradeoff between cell viability and fecundity; (4) cell contribution to the collective is optimal; and (5) there is an initial reproductive cost in large collectives. Thereafter the chapter contrasts two interpretations of the model in the context of ETIs. Originally, the model was interpreted as showing that during the transition to multicellularity the fitness of the lower-level (the cells) is “transferred” to the higher level (the collective). Despite its apparent intuitiveness, fitness transfer may obscure actual mechanisms in metaphorical language. Thus, an alternative and more conservative interpretation of the model that focuses on cell traits and the evolutionary constraints that link them is advocated. In addition, it allows for pursuing subsequent questions, such as the evolution of development. (shrink)

Fincher & Thornhill (F&T) present a compelling argument that parasite stress underlies certain cultural practices promoting assortative sociality. However, we suggest that the theoretical framework proposed is limited in several ways, and that life history theory provides a more explanatory and inclusive framework, making more specific predictions about the trade-offs faced by organisms in the allocation of bioenergetic and material resources.

In lieu of an abstract, here is a brief excerpt of the content: Classical Art: A Life History DAVID CAST This is a wonderful book, rich in its purposes, wide in its range and, thanks to the author’s home institution, Christ’s College, Cambridge, lavishly illustrated with images of objects, many familiar, some less so. And it is written with an elegance and clarity that belies the depths of scholarship in its history. The first letter of the subtitle suggests the (...) tenor of Vout’s account, that since every age has conjured up a different idea of the classical, what is here is yet one more such history, a modest if particular account of what was and is still there in the records made of the Greek and Roman past. The basic metaphor Vout uses to define the focus of this history is that of conversation, whether such conversing is seen to exist between the objects themselves or between the past and the present, between those objects that have outgrown their intended functions to become part of a canon that has dictated taste over the ages, as she puts it, shaping culture and culture’s questions. Thus conversation is here, plus also what Vout is not afraid, when necessary, to call the misappropriations and translocations of the Greek and Roman objects she takes note of. Yet another contribution she adds to the idea of the classical comes from what she calls, perhaps a little awkwardly, the long durée approach to its subjects, seen first when these objects were produced, then as they survived Christianity and the fall of Rome and Byzantium, the French Revolution, modernism and fascism, to live Caroline Vout, Classical Art: A Life History from Antiquity to the Present, Princeton University Press, 2018. xi + 376 pages; 80 color + 132 b/w illustrations. $39.50. ISBN 9780691177038; E-book ISBN9781400890279. arion 27.1 spring/summer 2019 on in galleries and auction rooms, making the heart soar and the blood boil, as Vout claims, even today. It is a complex story she has to tell, difficult yet valuable, and its method is nicely exemplified by the first example considered, the two statues, known as the Tyrannicides, dated to 477–476 BCE, and located now in the National Archaeological Museum in Naples, attributed on the museum caption to the sculptors Kritios and Nesiotes, and dated to 477–476 BCE. The details here are crucial for, on investigation, it is clear these are not the statues that were erected in the Athenian agora to honor the men, Harmodius and Aristogeiton, who, by tradition, had killed the tyrant’s brother Hipparchus. Yet even this second group, as she notes, had been a stand-in, since the first piece to honor these men, made by the sculptor Antenor, had been stolen by the Persians in the sack of Athens in 480–479 BCE. Nor is this group here the actual second group but rather a copy, made by an unknown copyist working under the Roman Empire. What we have here are what might be called pretenders—yet ones, despite doubts about their authenticity, that have long been taken to mark a particular moment in the formal history of Greek art, the advent of the so-called Severe style in Athens and the birth of the classical moment of sculpture. Any full account of these statues depends then on a rich history, plus a range of other events; the existence of ancient casts of the Tyrannicides during the Roman Empire, marking out such statues as art, rather than having still their first meaning; the prior history in the Renaissance of the acquisition of ancient sculpture as a sign of power; the sight of the figure of Aristogeiton, then in the Palazzo Farnese in Rome, by Johann Joachim Winckelmann; the building up of these statues from fragments of other statues; in 1859 the identification of these figures as the Tyrannicides; and finally a reading of classical texts, those of Pausanias, Pliny and Lucian, that spoke, even if in contradictory ways, of all the actors here, Antenor, Kritios and Aristogeiton. To which should be added the recent accounts of these pieces, provided by schol172 classical art: a life history ars of classical art like Brunilde Ridgway, R. T... (shrink)

Qualitative inquiry into eating disorders is burgeoning, offering valuable and innovative insights into various aspects of the condition. This study used life‐history interviews with 20 women who had recovered from anorexia nervosa, bulimia nervosa or both and who had remained healthy. The interviews focused on the women's narratives and experience rather than a diagnostic therapeutic model. Three themes of control, connectedness and conflict emerged as significant in the development, experience of, and recovery from an eating disorder. The development of (...) the condition was attributed to a lack of control, a sense of non‐connectedness to family and peers and extreme conflict with significant others. Recovery occurred when the women re‐engaged with life, developed skills necessary for conflict resolution and rediscovered their sense of self. Rather than viewing the development of, and recovery from an eating disorder as separate and discrete events, the data from the life‐history interviews suggest they are better viewed as one entity — that is, the journey of an individual attempting to discover and develop their sense of self. This perspective challenges some current constructs of eating disorders; it is not a condition in and of itself but a symptom of deeper issues that if addressed, when the individual is ‘ready’ to make that choice, will lead to recovery. (shrink)

Globally, mortality and fertility rates generally fall as resource abundance increases. This pattern represents an evolutionary paradox insofar as resource-rich ecological contexts can support higher numbers of offspring, a component of biological fitness. This paradox has not been resolved, in part because the relationships between fertility, life history strategies, reproductive behavior, and socioeconomic conditions are complex and cultural-historically contingent. We aim to understand how we might make sense of this paradox in the specific context of late-twentieth-century, mid–demographic transition Chile. (...) We use distribution-specific generalized linear models to analyze associations between fertility-related life-history traits—number of offspring, ages at first and last reproduction, average interbirth interval, and average number of live births per reproductive span year—and socioeconomic position (SEP) using data from a cohort of 6,802 Chilean women born between 1961 and 1970. We show that Chilean women of higher SEP have shorter average interbirth intervals, more births per reproductive span year, later age at first reproduction, earlier ages at last reproduction, and, ultimately, fewer children than women of lower SEP. Chilean women of higher SEP consolidate childbearing over a relatively short time span in the middle of their reproductive careers, whereas women of lower SEP tend to reproduce over the entirety of their reproductive lifespans. These patterns may indicate that different SEP groups follow different pathways toward declining fertility during the demographic transition, reflecting different life-history trade-offs in the process. (shrink)

To write a history “from antiquity to the present” of classical art or literature (or, worst of all, classicism) is the ultimate nightmare aspiration for a scholar whose colleagues are attentive methodologists. The product, when there is one (which I add because the aspiration can yield paralysis), is always in part an apologetic treatise on historical method. Professor Vout—of Christ's College, Cambridge—apologizes with the first word of her subtitle, A, which stresses that many differing histories may be as valid as (...) her own. The next two words, Life History, imply that her study is unauthorized, conjectural, a bit personal or informal, and reliant to an extent on unconfirmable stories. Her book, she tells readers, is of necessity an arrangement of “fragments” and “a mapping not of facts, but of ways in which Greek and Roman artifacts experience history.” She sets down, moreover, as a rule that “classical” is not “a self-standing category: it is always relational” (which historians of the novel have been telling us for many decades about “realism”).We might expect the result of Vout's axioms to be evenhanded diffidence when treating definitions of the classical, and indeed she entertains even the idea of Jeff Koons—maker of Balloon Venus (Orange) and Gazing Ball (Barberini Faun)—as a classical sculptor. There is, however, one approach that she dismisses out of hand: the obsession of classical humanism with authenticity and its renascence. She objects especially to research into the original conditions of objects and to the application of increasingly intrusive methods of restoring them. As she writes, “ ‘Real knowledge’ comes not from antiquities that have been ripped from their original context, cleaned and reconstituted for display in galleries and glass cabinets. ‘Real knowledge’ comes from antiquities that carry their dirt with them.”What Vout, as a critic of humanism, means by dirt is patina—the residue, interesting and sometimes beautiful in itself, of the use and misuse of objects. Dirt is a word that would occur to a humanist art historian when examining the patina of a Greek or Roman object. Vout's use of the word is a parodic expression of reverse snobbery. When studying changes, whether mistakes or enhancements, in a Greek or Roman document, a humanist literary historian would speak of corruption and edit the corrupt text by means of processes that humanist editors invented and perfected. Despite the humanists’ devotion to the recovery of classical learning, however, once a Renaissance edition of a manuscript was in print, the original, however rare, was often destroyed or lost. In effect, the work was reborn, better than new. Rebirth is not the same as preservation: though both are perhaps conservative (or better, in Ulysses's words, “rere regardant”), a renascence or a resurrection is cataclysmic.The humanist approach to the past can appear unlovable and is certainly arrogant, but it can also inspire awe and gratitude. The work of Michelangelo depended on it, and so (more to the point) did Martin Luther's. Vout's attitude toward dirt (patina, corruption, misprision, insertions, recontextualizations, bowdlerizations, misappropriations, translocations) resembles that of Catholic theologians to the depositum fidei. Restoring the original conditions of the Christian church involved methods of research learned from Renaissance humanists and the removal, often destructive, of the “deposit” or residue or patina that adhered to, distorted, discolored, and obscured the conditions of the “primitive church.” A Roman Catholic may well dislike the processes that Luther set in motion, but imagine a scholarly history of Christianity that mentioned Protestantism only to regret its existence.Still, Vout's reasoning, it seems to me, is more sophisticated in its defense of dirt and in its criticism of restoration than any offered against the Protestants’ reasoning during the Counter-Reformation. Consider, for instance, this inspiring passage: “When the curators at the Munich Glyptothek removed Thorwaldsen's restorations from the Aegina pediments, they did not so much take them back to a pristine state as out of the feedback loop, rendering them damaged goods. It was not a restriction of avenues or a change of direction that was being enacted here, but a refusal to speak the language, or rather an insistence that the only language worth speaking was an academic [humanist, restorationist] one.... In 2011, the Glyptothek marked the two hundredth year of the pediments’ discovery by putting new versions of Thorvaldsen's restored figures on display. They had relearned the lingo. For art to be ‘classical,’ it has to know its place in the discourse.” May lingo and feedback loop have successful careers in the lexicon of classical scholarship. “Far from producing a nostalgic narrative,” as Vout informs us, “the lessons learned from looking back ensure that we keep traveling.”. (shrink)