"This book is a sorely needed corrective. Animal Spirits is an important--maybe even a decisive--contribution at a difficult juncture in macroeconomic theory.

The evolutionary origin of human pair-bonds is uncertain. One hypothesis, supported by data from forgers, suggests that pair-bonds function to provision mothers and dependent offspring during lactation. Similarly, public health data from large-scale industrial societies indicate that single mothers tend to wean their children earlier than do women living with a mate. Here we examine relations between pair-bond stability, alloparenting, and cross-cultural trends in breastfeeding using data from 58 “traditional” societies in the Standard Cross-Cultural Sample (SCCS). Analyses show that stable (...) conjugal relationships were associated with significantly later weaning among the societies in the SCCS. The relationship between pair-bond stability and age at weaning was not mediated by women’s ability to provision themselves or women’s kin support. Availability of alloparental care was also inversely related to age at weaning, and the association was not significantly reduced after controlling for frequency of divorce. This study indicates that among a woman’s kin relationships, a pair-bond with a child’s father is especially supportive of breastfeeding. These cross-cultural findings are further evidence that human pair-bonds may have evolved to support lactation. (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)

Classifications of animals and plants have long been represented by hierarchical lists of taxa, but occasional authors have drawn diagrammatic versions of their classifications in an attempt to better depict the "natural relationships" of their organisms. Ornithologists in 19th-century Britain produced and pioneered many types of classificatory diagrams, and these fall into three groups: (a) the quinarian systems of Vigors and Swainson (1820s and 1830s); (b) the "maps" of Strickland and Wallace (1840s and 1850s); and (c) the evolutionary diagrams of (...) the post-Darwin authors (1860 on). The quinarians distinguished between affinity and analogy and used both in their classifications, whereas Strickland rejected the quinarians' belief in numerical regularity and their use of analogy. Wallace's "maps" are easily given an evolutionary interpretation, and his approach was taken up and modified by later evolutionary anatomists. Sharpe returned to Strickland's methods and merely appended a superficial evolutionary interpretation. Contrary to common belief systematics has a rich conceptual history, and many of the conceptual developments in 19th-century systematics were made by ornithologists. (shrink)

Patterns of human kinship commonly involve preferential treatment of relatives based on lineal descent (lineages) rather than degree of genetic relatedness (kindreds), presenting a challenge for inclusive fitness theory. Here, we examine effects of lineage and kindred characteristics on reproductive success (RS) and number of grandchildren for 130 men and 124 women in a horticultural community on Dominica. Kindreds had little effect on fitness independently of lineage characteristics. Fitness increased with the number of lineal relatives residing in the community but (...) decreased beyond an apparently optimal lineage size, suggesting resource enhancement and competition among kin. Female-biased patrilineage sex ratio was positively associated with men’s fitness, while male-biased matrilineage sex ratio was positively associated with women’s fitness. Number of brothers in the community was negatively associated with men’s, but not women’s, fitness. Parents and number of sisters had no effect on either male or female reproduction; however, women with younger sisters had higher RS, suggesting benefits of kin support for childcare. In sum, imposed norms for lineage social organization may enhance lineal ancestors’ inclusive fitness at a cost to individual inclusive fitness. (shrink)

he most worrisome skeptical doubt Descartes raises in the first of his Meditations is the hypothesis of an evil deceiver. While it might seem plainly certain and indubitable that he is “sitting by the fire, wearing a winter cloak, holding this paper” in his hands, and so on, it is possible that all these—fire, cloak, paper, even hands—are illusions. “I will suppose, then, not that there is a supremely good God, the source of truth; but that there is an evil (...) spirit, who is supremely powerful and intelligent, and does his utmost to deceive me. I will suppose that sky, air, earth, colors, shapes, sounds and all external objects are mere delusive dreams, by means of which he lays snares for my credulity.”. (shrink)

In anthropology, archaeology and popular culture, Shamanism may be one of the most used, abused and misunderstood terms, to date. Researchers are increasingly recognizing the socio‐political roles of altered states of consciousness and shamanism in past and present societies, yet the rise of Neo‐shamanism and its implications for academics and their subjects of study are consistently neglected. Moreover, many academics marginalize "neo‐shamans," and neo‐shamanic interaction with anthropology, archaeology and indigenous peoples is often regarded as neocolonialism. To complicate the matter, indigenous (...) peoples express multivocal opinions of neo‐shamanism, from blatant condemnation to active encouragement. I first trace the roots of neo‐shamanism in order to compare neo‐shamanic and academic approaches. Criticisms of neo‐shamanism as expressed by academic and native critics are presented, and I suggest these conflicting views are potentially reconcilable. Essentially, post‐processualist praxis should be implemented via programs of research and communication. (shrink)

A commentary on “Why It's Not Time for Health Care Rationing,” by Peter A. Ubel, in the March‐April 2015 issue.

Fodor and Pylyshyn (1988), Fodor and McLaughlin (1990) and McLaughlin (1993) challenge connectionists to explain systematicity without simply implementing a classical architecture. In this paper I argue that what makes the challenge difficult for connectionists to meet has less to do with what is to be explained than with what is to count as an explanation. Fodor et al. are prepared to admit as explanatory, accounts of a sort that only classical models can provide. If connectionists are to meet the (...) challenge, they are going to have to insist on the propriety of changing what counts as an explanation of systematicity. Once that is done, there would seem to be as yet no reason to suppose that connectionists are unable to explain systematicity. (shrink)

It has become something of a truism that people with Autism Spectrum Disorders (ASD) have difficulties with pragmatics. Granting this, however, it is important to keep in mind that there are numerous kinds of pragmatic ability. One very important divide lies between those pragmatic competences which pertain to non-literal contents – as in, for instance, metaphor, irony and Gricean conversational implicatures – and those which pertain to the literal contents of speech acts. It is against this backdrop that our question (...) arises: Are certain pragmatic tasks more difficult than others for people with ASD? (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)

80 titles published between 1965 and 1996 in multiple languages attest to an increase in scholarly interest in the history of systematic biology, both among scientific practitioners and also among historians and philosophers of science. Topics studied have included the early history of the field (Ray, Linnaeus, Buffon), the influence of essentialism on systematics, the history of systematic diagrams, the development of cladistic analysis, the nature of species, and the growth of phylogenetic thinking.

138 titles across a wide range of scholarly publications illustrate the conceptual affinities that connect the palaetiological sciences of biological systematics, historical linguistics, and stemmatics. These three fields all have as their central objective the reconstruction of evolutionary "trees of history" that depict phylogenetic patterns of descent with modification among species, languages, and manuscripts. All three fields flourished in the nineteenth century, underwent parallel periods of quiescence in the early twentieth century, and in recent decades have seen widespread parallel revivals. (...) "Tree thinking" (O'Hara, 1988) is now standard within evolutionary biology, and the unity of what William Whewell called palaetiology is being once again appreciated by scholars and scientists in many fields. (shrink)

If parenting behavior influences attachment, then parental investment (PI) theory can predict sex differences and distributions of attachment styles across cultures. Trivers-Willard, local resource competition, and local resource enhancement models make distinct predictions for sex-biased parental responsiveness relevant to attachment. Parental investment and attachment probably vary across cultures in relation to for status, wealth, and well-being.

In Darwinian Heresies, which was originally published in 2004, prominent historians and philosophers of science trace the history of evolutionary thought, and challenge many of the assumptions that have built up over the years. Covering a wide range of issues starting in the eighteenth century, Darwinian Heresies brings us through the time of Charles Darwin and the Origin, and then through the twentieth century to the present. It is suggested that Darwin's true roots lie in Germany, not his native England, (...) that Russian evolutionism is more significant than many are prepared to allow, and that the true influence on twentieth-century evolution biology was not Charles Darwin at all, but his often-despised contemporary, Herbert Spencer. The collection was intended to interest, to excite, to infuriate, and to stimulate further work. (shrink)

Institutions of higher education in the United States are remarkably diverse in their educational purposes, their organizational structure, and their architectural styles. But underlying all this diversity are two distinct historical models: the decentralized British "collegiate" model of university education, and the centralized Germanic university model. Early American higher education grew out of the British collegiate tradition and emphasized the comprehensive development of students' intellect and character, while the Germanic university tradition, introduced in the late 1800s, shifted the focus to (...) technical scholarship and research. The Germanic university model held sway for much of the twentieth century, but there is now a widespread renewal of interest in the older decentralized British collegiate model, and in universities across the United States and around the world, small "residential colleges" like those at Oxford and Cambridge are now being planned and built. These residential colleges or "houses" (as they are sometimes called) provide small, stable, faculty-led, home-like environments for a few hundred students each, and their social and architectural design seeks to counteract the impersonal bureaucratic experience that students often have in large Germanic-style universities. This revival of the collegiate model of university organization is one of the most important trends in the design of educational communities in the world today. (shrink)

Models of scientific explanation derived from the physical sciences are often poorly suited to the historical sciences—to the fields William Whewell called the palaetiological sciences. A listing of 27 titles that explore the nature of narrative understanding across a range of scientific disciplines—from cosmology to paleontology to economics—attests to the importance of narrative epistemology in the sciences.