This paper addresses methodological and metatheoretical aspects of the ongoing debate over the adaptive significance of Tibetan polyandry. Methodological contributions include a means of estimating relatedness of fraternal co-husbands given multigenerational polyandry, and use of Hamilton’s rule and a member-joiner model to specify how inclusive fitness gains of co-husbands may vary according to seniority, opportunity costs, and group size. These methods are applied to various data sets, particularly that of Crook and Crook (1988). The metatheoretical discussion pivots on (...) the critique by evolutionary psychologists of adaptationist accounts of polyandry. Contrary to this critique, I argue that valid adaptationist explanations of such practices do not necessitate cognitive mechanisms evolved specifically to produce polyandry, nor that there must have been exact equivalents of Tibetan agricultural estates and social institutions in human evolutionary history. Specific issues raised when one posits either kin selection or cultural evolution to explain the adaptive features of Tibetan polyandry are also discussed. (shrink)

Fraternal polyandry—one woman simultaneously being married to two or more brothers—has been a prominent practice within Tibetan agricultural societies for many generations. While the topic of Tibetan polyandry has been widely discussed in the field of anthropology, there are, to my knowledge, no contributions by philosophers on this topic. For this reason alone, my brief analysis of the ethics of Tibetan polyandry will serve to enhance scholars’ understanding of this practice. In this article I examine the factors (...) that have sustained the practice of polyandry in Tibet, but do so with the further aim of drawing attention to some of the key ethical implications of polyandrous marriage. I argue that the natural law criticisms raised against the practice of polyandry by St. Thomas Aquinas are unsuccessful, but I also argue that the utilitarian motivations for this marriage practice endorsed by agrarian Tibetans are also highly suspect. (shrink)

We have identified a sample of 53 societies outside of the classical Himalayan and Marquesean area that permit polyandrous unions. Our goal is to broadly describe the demographic, social, marital, and economic characteristics of these societies and to evaluate some hypotheses of the causes of polyandry. We demonstrate that although polyandry is rare it is not as rare as commonly believed, is found worldwide, and is most common in egalitarian societies. We also argue that polyandry likely existed (...) during early human history and should be examined from an evolutionary perspective. Our analysis reveals that it may be a predictable response to a high operational sex ratio favoring males and may also be a response to high rates of male mortality and, possibly, male absenteeism. Other factors may contribute, but our within-polyandry sample limits analysis. (shrink)

Applications of sexual selection theory to humans lead us to expect that because of mammalian sex differences in obligate parental investment there will be gender differences in fitness variances, and males will benefit more than females from multiple mates. Recent theoretical work in behavioral ecology suggests reality is more complex. In this paper, focused on humans, predictions are derived from conventional parental investment theory regarding expected outcomes associated with serial monogamy and are tested with new data from a postreproductive cohort (...) of men and women in a primarily horticultural population in western Tanzania (Pimbwe). Several predictions derived from the view that serial monogamy is a reproductive strategy from which males benefit are not supported. Furthermore, Pimbwe women are the primary beneficiaries of multiple marriages. The implications for applications of sexual selection theory to humans are discussed, in particular the fact that in some populations women lead sexual and reproductive lives that are very different from those derived from a simple Bateman-Trivers model. (shrink)

Table of Contents I. WHO ARE THE SCIENTISTS? Historically. Women in the Origins of Modern Science, Londa Schiebinger. Women of Third World Descent in the Sciences, Sandra Harding. Recently. Women in Science: Half In Half Out, Vivian Gornick.”How Can a Little Girl Like You Teach a Great Big Class of Men?’ the Chairman Said, and Other Adventures of a Woman in Science, Naomi Weisstein. The Anomaly of a Woman in Physics, Evelyn Fox Keller. Currently. Women Join the Ranks of Science (...) but Remain Invisible at the Top, Natalie Angier. Creeping Toward Inclusivity in Science, Phyllis Goldberg. II. WHAT KIND OF ENTERPRISE IS SCIENCE? Science’s Aims, Methods, and Norms of Behavior. Patriarchy, Scientists, and Nuclear Warriors, Brian Easlea. Culturally Inclusive Chemistry, Catherine Hurt Middlecamp. A World of Difference, Evelyn Fox Keller. Interviewing Women: A Contradiction in Terms, Ann Oakley. Science’s Subject Matter. Have Only Men Evolved?, Ruth Hubbard. Empathy, Polyandry, and the Myth of the Coy Female, Sarah Blaffer Hrdy. The Importance of Feminist Critique for Contemporary Cell Biology, The Biology and Gender Study Group. The Engendering of Archaeology: Refiguring Feminist Science Studies, Alison Wylie. Still Seeking Transformation: Feminist Challenges to Psychology, Sue Wilkinson. Science’s Social Effects. Androcentric Bias in Clinical Research, Sue Rosser. Man-Made Medicine and Women’s Health, Nancy Krieger and Elizabeth Fee. The New Procreative Technologies, Ruth Hubbard. A Question of Genius: Are Men Really Smarter Than Women?, Anne Fausto-Sterling. III. WHAT KIND OF ENTERPRISE OUGHT SCIENCE TO BE? Feminist Empiricism. Subjects, Power, and Knowledge: Description and Prescription in Feminist Philosophies of Science, Helen Longino. Epistemological Communities, Lynn Hankinson Nelson. Feminist Standpoint Theory. ”Strong Objectivity’: A Response to the New Objectivity Question, Sandra Harding. Introduction to Tomorrow’s Tomorrow: The Black Woman, Joyce Ladner. Feminist Postmodernism. Situated Knowledges: The Science Question in Feminism and the Privilege of Partial Perspective, Donna Haraway. Though This Be Method, Yet There Is Madness in It: Paranoia and Liberal Epistemology, Naomi Scheman. (shrink)

In birds and frogs, species pairs retain the capacity to produce viable hybrids for tens of millions of years, an order of magnitude longer than mammals. What accounts for these differences in relative rates of pre- and postzygotic isolation? We propose that reproductive mode is a critically important but previously overlooked factor in the speciation process. Viviparity creates a post-fertilization arena for genomic conflicts absent in egg-laying species. With viviparity, conflict can arise between: mothers and embryos; sibling embryos in the (...) womb, and maternal and paternal genomes within individual embryos. Such intra- and intergenomic conflicts result in perpetual antagonistic coevolution, thereby accelerating interpopulation postzygotic isolation. In addition, by generating intrapopulation genetic incompatibility, viviparity-driven conflict favors polyandry and limits the potential for precopulatory divergence. Mammalian diversification is characterized by rapid evolution of incompatible feto-maternal interactions, asymmetrical postzygotic isolation, disproportionate effects of genomically-imprinted genes, and “F2 hybrid enhancement.” The viviparity-driven conflict hypothesis provides a parsimonious explanation for these patterns in mammalian evolution. BioEssays 22:938–946, 2000. © 2000 John Wiley & Sons, Inc. (shrink)

August Weismann proposed that genetic changes in somatic cells cannot pass to germ cells and hence to next generations. Nevertheless, evidence is accumulating that some environmental effects can promote heritable changes in the DNA of germ cells, which implies that some somatic influence on germ line is possible. This influence is mostly detrimental and related to the presence of oxidative stress, which induces mutations and epigenetic changes. This effect should be stronger in males due to the particular characteristics of sperm. (...) Here, we propose the hypothesis that females are able to avoid males with oxidatively damaged DNA in the germ line by using oxidative‐dependent (pre‐ and post‐mating) signals. This new hypothesis may shed light on unsolved questions in evolutionary biology, such as the benefits of polyandry, the lek paradox, or the role of sexual selection on the evolution of aging. BioEssays 30:1212–1219, 2008. © 2008 Wiley Periodicals, Inc. (shrink)

The word monogamy derives from the Greek words μóνoδ meaning one and γάμoδ meaning marriage. When Christianity was founded, polygamy (the marriage of a man to many women) was, at that point in Judaic history, regarded as acceptable practice. The Gospel according to Matthew reports that Christ restored marriage to its original unity and indissolubility (Matt. 19:6). Monogamy is still deeply entrenched in the Christian tradition. It has long been held that polygamy and polyandry undermine the dignity due to (...) man and woman as parties to the marriage contract. The command “What God has joined together let no man put asunder” (Mark 10:9) is still a central part of the marriage ceremony of many denominations notwithstanding widespread changes of attitude and practice. -/- . (shrink)