This article utilizes three premises. There are commonly ecologically oriented, naturally selected specialized differences in frequency and/or quality as well as sexually selected differences between the sexes. Sex in the sense of coming together and going apart or going apart and coming together is trade in these naturally selected differences, i.e., there is a mating market in sexual species. While such trade is beneficial to the population as a whole, sexual competition and selection is conflict over the profits of that (...) trade and can be detrimental to the population as a whole. These premises yield a naturally selected sex allocation theory of the possible directions and forms of sexual selection, i.e., one that includes costs as well as frequencies. This can explain conventional sex roles, the sex-role reversed, inter- as well as intrasexual selection, and passive as well as active choice. Any of these alternatives may be over mates, over gametes, or both. A hypothetical example based on density dependence relative to resources is provided, one that suggests that centrioles may be a cytoplasmic resource in males in multicellular animals, and which are the target of active choice and the mechanism of manipulation in passive female choice. As a whole, the approach yields a truly general theory of sexual selection, provides an alternative to the mechanism for Fisher’s principle, and gives a theoretical explanation for Mayr’s biological species definition. (shrink)

Bird songs often display musical acoustic features such as tonal pitch selection, rhythmicity, and melodic contouring. We investigated higher-order musical temporal structure in bird song using an experimental method called “music scrambling” with human subjects. Recorded songs from a phylogenetically diverse group of 20 avian taxa were split into constituent elements and recombined in original and random order. Human subjects were asked to evaluate which version sounded more “musical” on a per-species basis. Species identity and stimulus treatment were concealed from (...) subjects, and stimulus presentation order was randomized within and between taxa. Two recordings of human music were included as a control for attentiveness. Participants varied in their assessments of individual species musicality, but overall they were significantly more likely to rate bird songs with original temporal sequence as more musical than those with randomized temporal sequence. We discuss alternative hypotheses for the origins of avian musicality, including honest signaling, perceptual bias, and arbitrary aesthetic coevolution. (shrink)

This paper starts with an examination of the terms use d to designate the face in different languages, in particular in Italian, comparing these with the definitions provided by some authoritative dictionaries as well as with their etymology. This exploration yields some remarkable results: firstly, it appears that the face is indeed a term that has a material meaning, but at the same time it is a social object; secondly, the importance of the communicative function emerges, which makes the face (...) similar to the mask and in some ways to the arbitrariness of language. All this suggests that the philosophical status of the face is that of ‘transcendence’ which is a condition of that state of freedom that we attribute to ourselves and that can be defined as ‘human exception’. (shrink)

This essay argues that reflection on sexual selection can be theologically generative, and that it presents needed counteremphases to some of the discussions about theological anthropology that have been fueled by theological reflection on natural selection. It introduces sexual selection and provides an overview of different approaches to sexual selection found within evolutionary biology today, before transitioning to a reflection on one theologically relevant insight from sexual selection—namely, the importance of play. It argues that the mating and play behaviors of (...) animals reveal the noncompetitive relationship between necessity and gratuity, and thus provide theologians with an example of grace building upon, and not destroying, nature. While play is sometimes depicted in philosophical and theological accounts as the achievement of culture that supersedes the mundane necessities of nature, sexual selection can also help to illuminate the ways in which culture is dependent upon nature, and play is a thoroughly natural phenomenon that provides resources for human cultural elaboration. (shrink)

All forms of beauty create appeal or enticement with moral significance. Sublime beauty draws one into a deep relationship that properly promotes the good and true. Parents tend to experience such beauty in their children, as eloquently described in works such as the 14th-century poem ‘The Pearl’, and they see this even when their children are desperately ill or dying. The experience of beauty in one’s child creates or reinforces the morality of caring. Unfortunately, at the end of modernity, the (...) framing of beauty as only instrumental and subjective generally works against any recognition of dignity or respect for the very small pediatric patient. Practitioners who believe in the intrinsic value and dignity of persons as general concepts should recognize parental drawing toward their children as a particularization of a transcendental value. (shrink)

Song in oscine birds relies upon the rare capacity of vocal learning. Transmission can be vertical, horizontal, or oblique. As a rule, memorization and production by a naïve bird are not simultaneous: the long-term storage of song phrases precedes their first vocal rehearsal by months. While a wealth of detail regarding songbird enculturation has been uncovered by focusing on the apprentice, whether observational learning can fully account for the ontogeny of birdsong, or whether there could also be an element of (...) active teaching involved, has remained an open question. Given the paucity of knowledge on animal cultures, I argue for the utility of an inclusive definition of teaching that encourages data be collected across a wide range of taxa. Borrowing insights from musicology, I introduce the Australian pied butcherbird into the debate surrounding mechanisms of cultural transmission. I probe the relevance and utility of mentalistic, culture-based, and functionalist approaches to teaching in this species. Sonographic analysis of birdsong recordings and observational data of pied butcherbird behavior at one field site provide evidence that I assess based on criteria laid down by Caro and Hauser, along with later refinements to their functionalist definition. The candidate case of teaching reviewed here adds to a limited but growing body of reports supporting the notion that teaching may be more widespread than is currently realized. Nonetheless, I describe the challenges of confirming that learning has occurred in songbird pupils, given the delay between vocal instruction and production, as well as the low status accorded to anecdote and other observational evidence commonly mustered in instances of purported teaching. As a corrective, I press for an emphasis on biodiversity that will guide the study of teaching beyond human accounts and intractable discipline-specific burdens of proof. (shrink)

Culture can be defined as “group typical behaviour patterns shared by members of a community that rely on socially learned and transmitted information”. Once thought to be a distinguishing characteristic of humans relative to other animals it is now generally accepted to exist more widely, with especially abundant evidence in non-human primates, cetaceans, and birds. More recently, cumulative cultural evolution has taken on this distinguishing role. CCE, it is argued, allows humans, uniquely, to ratchet up the complexity or efficiency of (...) cultural traits over time. This “ratchet effect” gives the capacity to accumulate beneficial modifications over time beyond the capacities of a single individual. Mesoudi and Thornton define a core set of criteria for identifying CCE in humans and non-human animals that places emphasis on some performance measure of traits increasing over time. They suggest this emphasis is also pertinent to cultural products in the aesthetic domain, but is this the case? Music, art and dance evolve over time, but can we say they gain beneficial modifications that increase their aesthetic value? Here we bring together perspectives from philosophy, musicology and biology to build a conceptual analysis of this question. We summarise current thinking on cumulative culture and aesthetics across fields to determine how aesthetic culture fits into the concept of CCE. We argue that this concept is problematic to reconcile with dominant views of aesthetics in philosophical analysis and struggles to characterise aesthetic cultures that evolve over time. We suggest that a tension arises from fundamental differences between cultural evolution in aesthetic and technological domains. Furthermore, this tension contributes to current debates between reconstructive and preservative theories of cultural evolution. (shrink)

Are humans a domesticated species? How is this issue related to debates on the roles of human agency in human evolution? This article discusses four views on human domestication: Darwin’s view; the view of those who link human domestication to anthropogenic niche construction and, more specifically, to sedentism; the view of those who link human domestication to selection against aggression and the domestication syndrome; and a novel view according to which human domestication can be conceived of in terms of a (...) process of political selection. The article examines and compares these views to illustrate how discussions of human domestication can contribute to debates about how, and to what extent, human agency has affected human evolution. (shrink)

This meta-study applies a socio-semiotic framework combining five basic communicational aspects, form, content, act, time, and space, developed to help answering the questionCan animals refer?It further operates with four levels, sign, utterance, genre, and lifeworld, studying relations between utterance and genre in particular. Semantic key terms found in an excerpted ‘resource collection’ consisting of three anthologies, two academic journals, and a monography, studying content in animal communication, are inspected, and discussed, especially information, functional reference, and reference. Since a temporary inspection (...) concluded that the field seems unable to give convincing joint answers, the scope of the meta-study was extended to include critical investigations of implicit communicational epistemologies applied in the sources. Two major challenges were brought to surface. Firstly, the problem of conflicting interrelatedness in animal utterances (parts versus whole). Positioning analyses revealed that theories and project-designs were mostly dyadic, prioritising form/content, content/function, or function/form, and rarely form/content/function, as a whole. The second concerned the issue of functional openness of animal communication systems. The meta-study found that more recent studies tend to reduce an essentialist search for ‘clear’ categories in favor of more complex designs, where focus is less on references in utterances as such and more on a species’ communicational system. This shift in turn leads to a problematisation of the role of context, kinds of communication (life-genres) and semantic levels in animal utterances, in other words, on animal communication for particular species as a whole. (shrink)

The introduction claims that there might exist an evolutionary bridge from possible genres in nature to human cultural genres. A sub-hypothesis is that basic life-conditions, partly common for animals and humans, in the long run can generate so-called life-genres. To investigate such hypotheses a framework of interrelated key communicational concepts is outlined in the second, main part. Four levels are suggested. Signs are seen as elements in utterances. Further, sufficiently similar utterances can be perceived as kinds of utterances or genres. (...) Genres are kinds of communication in a species' life-world. Utterance and genre are the framework’s key concepts. Both are seen as products and processes and as constituted by five reciprocal aspects: form, content, act, time, and space, the necessary elements to initiate and interpret communication. A model illustrates this integrative principle. Part three dwells with the idea of life-genres, and part four exemplifies and problematises how a chimpanzee’s ‘begging’ for meat, a fish’s nest-making, and kinds of birdsongs, could be seen as possible life-genres. The last, short part gives a brief summary, highlights challenges, and reflects over the framework’s relevance for biosemiotics. (shrink)

We propose a model which argues that aesthetics is based on biosemiotic processes and introduces the non-anthropomorphic aesthetics. In parallel with habit-taking, which is responsible for generating semiotic regularities, there is another process, the semiotic fitting, which is responsible for generating aesthetic relations. Habit by itself is not good or bad, it is good or bad because of semiotic fitting. Defining the beautiful as the perfect semiotic fitting corresponds to the common conceptualisation of the aesthetic as well as extends it (...) over all umwelten. Perfection is not omnipotence, it only means the omnirelational semiotic fitting in the umwelt, or harmony with context. The process that presents something to be perceived as beautiful is of the same kind as the semiotic process that builds something to become beautiful. The argument is based on the observation that learning has a tendency towards perfection, until it is grounded. Semiosis is usually biased towards semiotic fitting, which stepwise leads towards perfection, and thus towards beauty. Such a general semiotic model implies that beauty is species-specific; that it is not limited to the sphere of emotions; that the reduction of the evolution of aesthetic features to sexual selection is false; and that humans should learn the aesthetics of other beings in order to avoid destroying valuable biocoenoses. (shrink)

Biologists have proposed a variety of explanations for extravagant sexual displays, and controversies over explanations define the history of sexual selection research. Recently, Richard Prum has d...

In this commentary I expand on the first of Noble’s illusions, the selection metaphor. Building on my work with Simona Ginsburg on the evolution of minimal consciousness, I argue that the existence of some complex sensory and motor patterns in the living world can be accounted for only through the evolution of conscious choice.

The scientific study of consciousness or subjective experiencing is a rapidly expanding research program engaging philosophers of mind, psychologists, cognitive scientists, neurobiologists, evolutionary biologists and biosemioticians. Here we outline an evolutionary approach that we have developed over the last two decades, focusing on the evolutionary transition from non-conscious to minimally conscious, subjectively experiencing organisms. We propose that the evolution of subjective experiencing was driven by the evolution of learning and we identify an open-ended, representational, generative and recursive form of associative (...) learning, which we call Unlimited Associative Learning (UAL), as an evolutionary transition marker of minimal consciousness. This evolutionary marker provides evidence that the evolutionary transition to consciousness has gone to completion and allows reverse-engineering from this learning capacity to the system that enables it – making possible the construction of a toy model of UAL. The model allows us to identify some of the key processes and structures that constitute minimal consciousness, points its taxonomic distribution and the ecological context in which it first emerged, highlights its function and suggests a framework for exploring developmental and evolutionary modifications of consciousness. We point to ways of experimentally testing the relationship between UAL and consciousness in human and in non-human animals and discuss the theoretical and ethical implications of our approach. The framework we offer allows the exploration of the evolutionary changes in agency, value systems, selective processes and goals that were involved in the transition to subjective experiencing from a perspective that resonates with the approaches of bio-semioticians. (shrink)

Challenged by Lord Kelvin's claims that earth and sun were too young to give evolution sufficient time to do its work, especially in the human case, where care for the weak blunts the edge of natural selection, Darwin leaned on Lamarckian thoughts to accelerate the process. The mental and moral traits crowning human distinctiveness, he urged, arose through sexual selection. But promiscuity, infanticide, early betrothals, and female drudgery undermined these effects in “savage races.” In the inevitable decline and ultimate extinction (...) of the “melanin races” Darwin believed he could observe human evolution underway before his eyes. (shrink)

Collecting goes beyond art collecting and seems to meet a more general need. Although it originally aided survival and has predecessors in the animal world, the gesture of collecting has complex motivations. After exploring the collector’s psychology and the behavioural differences between collectors and spectators, this paper analyses the logic of collecting and its principles: order, variation, attractive and meaningful display, the control of contingency, processuality and growth, seriality, and limitation. Finally, the paradoxical attempt to collect non-collectibles, such as gods, (...) clouds or human relations will be shown to illustrate a para-aesthetics of collecting which ranges from the poetics of everyday life to aestheticism. (shrink)

Organismic agency is often understood as the capacity to produce goal-directed behavior. This paper proposes a new way of modelling agency, namely as a naturalized deliberation. Deliberative action is not directed towards a particular goal, but involves a process of weighing multiple goals and a choice for a particular combination of these. The underlying causal model is symmetry breaking, where the organism breaks symmetries present in the selective environment. Deliberation is illustrated though the phenomena of mate choice and bacterial chemotaxis.

The problems psychopathic individuals impose on society and in their interpersonal relationships can be held in stark contrast to reports of their appeal and sexual success in some of those relationships. In the current paper, we seek to contextualize this enigma by focusing on the interpersonal dynamics of psychopathic individuals in romantic encounters. We first formulate a plausible evolutionary function, the sexual exploitation hypothesis, that proposes psychopathy exhibits “special design” features for subverting female mate choice, facilitating the induction of favorable (...) impressions and desire in prospective intimate relationships. We then test the hypothesis in two studies with university samples. Study 1 had young men assessed on psychopathy, social intelligence, and sociosexuality engage in a filmed dating interaction. Study 2 had young women view a subsample of the videos, rate them on desirability, and leave voice messages. Results show psychopathy was related to sociosexuality, specific factors of social intelligence, and generating higher desirability ratings from women after controlling for men’s physical attractiveness. Analyses involving comparisons of two men showed women’s ratings increased in favor of the more psychopathic man. Women’s voice pitch also changed, but only in response to different facets of psychopathy. The results provide preliminary support for the sexual exploitation hypothesis and suggest that more dynamic assessment of putative desirability in psychopathy may be required to capture its plausible special design features in prospective dating encounters. (shrink)