This paper reviews the evolutionary history and biology of love and marriage. It examines the current and imminent possibilities of biological manipulation of lust, attraction and attachment, so called neuroenhancement of love. We examine the arguments for and against these biological interventions to influence love. We argue that biological interventions offer an important adjunct to psychosocial interventions, especially given the biological limitations inherent in human love.

Human beings are a marvel of evolved complexity. Such systems can be difficult to enhance. When we manipulate complex evolved systems, which are poorly understood, our interventions often fail or backfire. It can appear as if there is a “wisdom of nature” which we ignore at our peril. Sometimes the belief in nature’s wisdom—and corresponding doubts about the prudence of tampering with nature, especially human nature—manifests as diffusely moral objections against enhancement. Such objections may be expressed as intuitions about the (...) superiority of the natural or the troublesomeness of hubris or as an evaluative bias in favor of the status quo. This chapter explores the extent to which such prudence-derived anti-enhancement sentiments are justified. We develop a heuristic, inspired by the field of evolutionary medicine, for identifying promising human enhancement interventions. The heuristic incorporates the grains of truth contained in “nature knows best” attitudes while providing criteria for the special cases where we have reason to believe that it is feasible for us to improve on nature. (shrink)

abstract As history shows, some human beings are capable of acting very immorally. 1 Technological advance and consequent exponential growth in cognitive power means that even rare evil individuals can act with catastrophic effect. The advance of science makes biological, nuclear and other weapons of mass destruction easier and easier to fabricate and, thus, increases the probability that they will come into the hands of small terrorist groups and deranged individuals. Cognitive enhancement by means of drugs, implants and biological (including (...) genetic) interventions could thus accelerate the advance of science, or its application, and so increase the risk of the development or misuse of weapons of mass destruction. We argue that this is a reason which speaks against the desirability of cognitive enhancement, and the consequent speedier growth of knowledge, if it is not accompanied by an extensive moral enhancement of humankind. We review the possibilities for moral enhancement by biomedical and genetic means and conclude that, though it should be possible in principle, it is in practice probably distant. There is thus a reason not to support cognitive enhancement in the foreseeable future. However, we grant that there are also reasons in its favour, but we do not attempt to settle the balance between these reasons for and against. Rather, we conclude that if research into cognitive enhancement continues, as it is likely to, it must be accompanied by research into moral enhancement. (shrink)

This study investigates changes in sexual motivation over the duration of a partnership in a population sample stratified by age. The results replicate and extend the findings of a previous study that was based on a sample of college students. In the samples of 30- and 45-year-olds, male sexual motivation remains constant regardless of the duration of the partnership. Female sexual motivation matches male sexual motivation in the first years of the partnership and then steadily decreases. In the sample of (...) 60-year-olds, male sexual motivation always exceeds female sexual motivation, and both are little affected by duration of the partnership. This pattern is clearly evident for some measures of sexual motivation and less so or not at all for others. Interpretations of the current results from social constructivism or from mainstream psychology are difficult to conceive. The results seem more intelligible from an evolutionary perspective as reflections of evolved design for sexual motivation, fine-tuned to the different conditions governing the reproductive success of males and females. In this view male sexual motivation promotes a constant frequency of copulation in order to guard against cuckoldry. Female sexual motivation, in contrast, promotes copulation to solve the adaptive problem of procuring male resources by establishing and maintaining a pair bond. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy and Literature 30.2 (2006) 450-470 MuseSearchJournalsThis JournalContents[Access article in PDF]Romantic Love: A Literary Universal?Jonathan Gottschall Washington and Jefferson College (JG)Marcus Nordlund * Göteborg University (MN)ITo love someone romantically is—at least according to innumerable literary works, much received wisdom, and even a gradually coalescing academic consensus—to experience a strong desire for union with someone who is deemed entirely unique. It is to idealize this person, to think constantly about (...) him or her, and to discover that one's own life priorities have changed dramatically. It is to care deeply for that person's well-being and to feel pain or emptiness when he or she is absent.But is this intense emotional experience a universal experience, something that is characteristically and quintessentially human, or is it merely a sociocultural construct that belongs to a particular time and place? On this point there is less agreement, both within and between different academic disciplines. The audacious question we want to raise in the pages that follow is whether literature—or more specifically, a large-scale, multiple-coder content analysis of thousands of folk tales drawn from different parts of the planet—can contribute something to this difficult question about love, culture, and human nature.Let us first look briefly at the theoretical problem that we aim to address. A widespread view among literary scholars and social scientists over the last decades has been that romantic love is a social construction specific to Western culture. This is part of a relentless skepticism [End Page 450] toward assumptions that important categories of human psychology and emotion—romantic and parental love, gender, sexual orientation, and so on—are "natural" rather than constructed. This position is often, if not always, linked to an ideological concern to demystify (or at least problematize) what is perceived as an essentially destructive or oppressive emotion or belief. Taking her cue from Simone de Beauvoir, Marilyn Friedman gives no less than ten reasons why it may be problematic for women to fall in love with men. 1Of course, no argument of any kind can be strictly ideological in nature since it always involves empirical assumptions—either explicit or implicit—about the nature of things. For example, the psychoanalyst E. S. Persons opines that the "best evidence that romantic love is not hard-wired into the emotional repertoire of humanity but is a cultural construct is the fact that there are so many cultures in which it is virtually absent." 2 Another frequent argument for love's constructedness has been that "there is no definition that describes love throughout the ages or across cultures." 3In some literary-critical accounts, it is even argued that romantic love is a cultural invention that can be traced back with precision to the courtly troubadour culture of twelfth-century France. 4 According to yet another school, represented by the influential literary theorist Jonathan Culler, "the notion of romantic love (and its centrality to the lives of individuals) is arguably a massive literary creation." 5While the social constructivist position on romantic love typically involves a strong commitment to cultural specificity, a weaker version is held even by some cognitive theorists who grant more to biology and panhuman traits. From the perspective of their communicative theory of emotion, Philip Johnson-Laird and Keith Oatley argue that the "components [of romantic love] exist separately in different societies, but their integration into a recognizable complex is a cultural accomplishment [by the West]." 6At the other end of the romantic love continuum we find those who argue that this emotion belongs to a universal human nature: or, more specifically, that it can be attributed to specialised neural circuits whose ultimate purpose is to enhance reproductive success. Not surprisingly, this has been a favorite position among evolutionary psychologists, and it has recently received some support from neuroscientific studies.For example, the neuroscientists Andreas Bartels and Samir Zeki claim to have uncovered a "functionally specialised system" that lights up in fMRI (magnetic resonance) scans of brains whose owners claim to... (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)

Marc Hauser puts forth the theory that humans have evolved a universal moral instinct, unconsciously propelling us to deliver judgments of right and wrong independent of gender, education, and religion. Combining his cutting-edge research with the latest findings in cognitive psychology, linguistics, neuroscience, evolutionary biology, economics, and anthropology, Hauser explores the startling implications of his provocative theory vis-à-vis contemporary bioethics, religion, the law, and our everyday lives.

Bestselling author Sam Harris dismantles the most common justification for religious faith-that a moral system cannot be based on science.

Second, this collection of cognitive programs evolved in the Pleistocene to solve the adaptive problems regularly faced by our hunter-gatherer ancestors-...