Evolutionary Anthropology Research Articles

ECR Spotlight – Grégoire Boulinguez-Ambroise

ECR Spotlight is a series of interviews with early-career authors from a selection of papers published in Journal of Experimental Biology and aims to promote not only the diversity of early-career researchers (ECRs) working in experimental biology but also the huge variety of animals and physiological systems that are essential for the ‘comparative’ approach. Grégoire Boulinguez-Ambroise is an author on ‘ Biomechanical and morphological determinants of maximal jumping performance in callitrichine monkeys’, published in JEB. Grégoire conducted the research described in this article while a postdoc in Jesse W. Young's lab at the Department of Anatomy and Neurobiology, Northeast Ohio Medical University (NEOMED), Rootstown, OH, USA. He is now a postdoc in the lab of Daniel Schmitt at the Department of Evolutionary Anthropology, Duke University, Durham, NC, USA, investigating the use of integrative approaches, combining morphology, behavior and performance, to further understand the origins of primate locomotion.

In search for evolutionary roots of a mindful cognition: A Darwinian view on sustained intentional awareness

The attention system underwent important evolutionary changes and specializations in the human genus. In fact, our outstanding social and technological complexity strictly depends on our attentional ability, which is sustained, intentional, and conscious. Attention, intention, and awareness are key features for what can be defined a mindful cognition, and we may wonder whether a specific combination of these cognitive traits may be the result of a natural selective process, or else an accidental by-product of mental complexity. In this article, basic concepts in evolutionary anthropology are reviewed, to consider whether positive, neutral, or negative selective forces might have influenced the evolution of a mindful cognitive ability. At present, all these alternatives are potentially supported by different kinds of evidence. Hybrid hypotheses, considering stabilizing mechanisms or distinct social roles and intra-specific variation, are also likely. An evolutionary approach to the cognitive abilities involved in attention and awareness can reveal potentialities, limitations, and drawbacks of our individual and collective natural behaviors, especially when dealing with the evolution of the human consciousness.

Keep your friends close, and your enemies closer: structural properties of negative relationships on Twitter

The Ego Network Model (ENM) is a model for the structural organisation of relationships, rooted in evolutionary anthropology, that is found ubiquitously in social contexts. It takes the perspective of a single user (Ego) and organises their contacts (Alters) into a series of (typically 5) concentric circles of decreasing intimacy and increasing size. Alters are sorted based on their tie strength to the Ego, however, this is difficult to measure directly. Traditionally, the interaction frequency has been used as a proxy but this misses the qualitative aspects of connections, such as signs (i.e. polarity), which have been shown to provide extremely useful information. However, the sign of an online social relationship is usually an implicit piece of information, which needs to be estimated by interaction data from Online Social Networks (OSNs), making sign prediction in OSNs a research challenge in and of itself. This work aims to bring the ENM into the signed networks domain by investigating the interplay of signed connections with the ENM. This paper delivers 2 main contributions. Firstly, a new and data-efficient method of signing relationships between individuals using sentiment analysis and, secondly, we provide an in-depth look at the properties of Signed Ego Networks (SENs), using 9 Twitter datasets of various categories of users. We find that negative connections are generally over-represented in the active part of the Ego Networks, suggesting that Twitter greatly over-emphasises negative relationships with respect to “offline” social networks. Further, users who use social networks for professional reasons have an even greater share of negative connections. Despite this, we also found weak signs that less negative users tend to allocate more cognitive effort to individual relationships and thus have smaller ego networks on average. All in all, even though structurally ENMs are known to be similar in both offline and online social networks, our results indicate that relationships on Twitter tend to nurture more negativity than offline contexts.

Cognitive and Evolutionary Inspirations in the Study of Religion with Emphasis on the Development of Ethnology and Sociocultural Anthropology in Slovakia

The cognitive and evolutionary approach to the research of religion in cultural and social anthropology has been systematically developing since the 1990s and the first decade of the 21st century. At the end of the 1990s, cognitive and evolutionary theories of religion began to be applied in the research of religion by a narrow group of ethnologists, religionists, and anthropologists in Slovakia. This paper aims to provide a basic overview of the fundamental concepts of cognitive and evolutionary anthropology of religion. It focuses on selected scholars whose works and ideas are considered pivotal in the development of this field. The second objective is to outline how cognitive and evolutionary theories of religion have been reflected in ethnology and sociocultural anthropology in Slovakia.

Evolving belief and being human: The emergence of religion in science and theology

Every human society as well as almost all human life is infused with ethics. There is common acknowledgement that morality and ethics are indispensable in addressing the serious global challenges humanity is faced with today. However, we seemed to have lost our grip on what morality is. How do we best understand human morality and ethics? This research argues that responsible ethics rests on a credible understanding of what it means to be human. The following exploration of the emergence of religion within the science and religion discourse formed part of a series of three seminars that have as their main objective to address a giant void regarding ethical and moral reflection within our society. This research was part of the discourse of the first seminar with the following main research question: What do we learn from the empirical study of morality (in the evolutionary sciences, the neurosciences, cultural anthropology, sociology, and moral psychology) about the sources, functions and characteristics of morality, and its relation to religion? This study offers an exploration of our capacity for religious awareness and belief against the background of niche construction theory. The capacity for imagination seems to have contributed to human evolutionary success and consequently our religious disposition. This transdisciplinary study combines perspectives of some of the most prominent interlocutors in the contemporary discourse on the emergence of religious awareness. By integrating the numerous perspectives evident in this study, this research explores how evolutionary thought can be constructively appropriated to interdisciplinary theology and ethics.Intradisciplinary and/or interdisciplinary implications: This article explores the origin of religious awareness and belief as part of a larger discourse on morality in history. The interdisciplinary conversation covers the fields of evolutionary anthropology and theology within the contemporary science-theology discourses.

Distribution of nose types among Igbos of South-East Nigeria

Background: The nose is an important aesthetic unit that is essential in defining the facial appearance of an individual and also helps in identifying a tribe or race. Understanding the distribution of nose types within the Igbo population is crucial for elucidating patterns of human diversity, population genetics, and evolutionary anthropology. The aims of this study were to determine some nasal parameters of Igbo adults, analyze the distribution of the types, check sexual dimorphism, and to correlate the parameters with age, height, weight and body mass index (BMI) respectively Materials and Methods: This was a descriptive cross-sectional study of 312 Igbos in Enugu of Southeastern Nigeria using cluster sampling. The nasal dimensions were measured with digital Vernier’s calipers and the nasal indices were calculated. Weight and height were also measured and BMI calculated. All data were collated and analyzed. Results: The mean age was 37.05 (±15.83). The age range was 20 to 69 years and they were grouped into 20 – 29 years group, 30 – 39, 40 – 49, 50 – 59 and 60 – 69 years groups. The range nasal height was 37.24 - 57.63mm for males, while range for females was 32.43 - 52.97mm. The range for nasal width was 37.04 - 51.29mm for males and 32.93 - 48.52mm for females. The mean nasal widths of males were significantly wider than those of females in all age groups respectively (p < 0.01). The mean nasal indices for males and females were 91.91 (platyrrhine) and 86.26 (platyrrhine) respectively. Majority of the sample population had platyrrhine nose (67%) while 32% of them had mesorrhine nose and only 1% of them had leptorrhine nose. There was a significant positive correlation between height of nose and width of nose of adult Igbos with their age, height and weight (p value <0.01) and a significant negative correlation with body mass index (p <0.01). Conclusion: This study provides valuable insights into the distribution of nose types among the Igbo people of South-East Nigeria. We have characterized the prevalence of different nose types and explored potential associations with demographic and anthropometric factors. The major nose type of Igbos is platyrrhine, while the minor one is mesorrhine. Knowledge of nasal parameters are applied in forensic studies; and in surgeries involving the nose, and this ensures that individuals do not lose their identities even after extensive nasal surgeries.

A practical guide to cross-cultural and multi-sited data collection in the biological and behavioural sciences.

Researchers in the biological and behavioural sciences are increasingly conducting collaborative, multi-sited projects to address how phenomena vary across ecologies. These types of projects, however, pose additional workflow challenges beyond those typically encountered in single-sited projects. Through specific attention to cross-cultural research projects, we highlight four key aspects of multi-sited projects that must be considered during the design phase to ensure success: (1) project and team management; (2) protocol and instrument development; (3) data management and documentation; and (4) equitable and collaborative practices. Our recommendations are supported by examples from our experiences collaborating on the Evolutionary Demography of Religion project, a mixed-methods project collecting data across five countries in collaboration with research partners in each host country. To existing discourse, we contribute new recommendations around team and project management, introduce practical recommendations for exploring the validity of instruments through qualitative techniques during piloting, highlight the importance of good documentation at all steps of the project, and demonstrate how data management workflows can be strengthened through open science practices. While this project was rooted in cross-cultural human behavioural ecology and evolutionary anthropology, lessons learned from this project are applicable to multi-sited research across the biological and behavioural sciences.

Janus faced: The co-evolution of war and peace in the human species.

The human species presents a paradox. No other species possesses the propensity to carry out coalitionary lethal attacks on adult conspecifics coupled with the inclination to establish peaceful relations with genetically unrelated groups. What explains this seemingly contradictory feature? Existing perspectives, the "deep roots" and "shallow roots" of war theses, fail to capture the plasticity of human intergroup behaviors, spanning from peaceful cooperation to warfare. By contrast, this article argues that peace and war have both deep roots, and they co-evolved through an incremental process over several million years. On the one hand, humans inherited the propensity for coalitionary lethal violence from their chimpanzee-like ancestor. Specifically, having first inherited the skills to engage in cooperative hunting, they gradually repurposed such capacity to execute coalitionary killings of adult conspecifics and subsequently enhanced it through technological innovations like the use of weapons. On the other hand, they underwent a process of cumulative cultural evolution and, subsequently, of self-domestication which led to heightened cooperative communication and increased prosocial behavior within and between groups. The combination of these two biocultural evolutionary processes-coupled with feedback loop effects between self-domestication and Pleistocene environmental variability-considerably broadened the human intergroup behavioral repertoire, thereby producing the distinctive combination of conflictual and peaceful intergroup relations that characterizes our species. To substantiate this argument, the article synthesizes and integrates the findings from a variety of disciplines, leveraging evidence from evolutionary anthropology, primatology, archeology, paleo-genetics, and paleo-climatology.

АНАЛИЗ ИЗМЕНЕНИЯ ТРАДИЦИОННОГО АЛГОРИТМА ФОРМИРОВАНИЯ РИСКОВ В ТРАНСГУМАНИСТИЧЕСКОЙ КОНЦЕПЦИИ

The research presented in the article is aimed at finding an intermediate approach that provides solutions related to the introduction of innovations offered by transhumanists. In connection with evolutionary anthropology, transhumanism supports technological development as a continuation of biological evolution. For transhumanists, the exponential growth of technology becomes an indispensable condition for the improvement of society, which, having reached a state beyond biology, will shape a new future for humanity: postbiological. The authors explore the possibility of predicting transhumanistic risks using integrated tools, taking into account the ethical component.

AMSD: The Australian Message Stick Database.

Message sticks are wooden objects once widely used in Indigenous Australia for facilitating important long-distance communications. Within this tradition an individual wishing to send a message would carve a stick and apply conventional symbols to its surface. The stick was entrusted to a messenger who carried the object into the territory of another community together with a memorised oral statement. Between the 1880s and the 1910s, settlers and international scholars took great interest in message sticks and this was reflected in efforts to document, collect and store them in museums worldwide. However, by this period, the practice was already undergoing profound changes, having been abandoned in many parts of the continent and transformed in others. While message sticks were still being used in a traditional way in Western Arnhem Land up until at least the late 1970s, today they feature in public interactions between Indigenous and non-Indigenous organisations, in art production and in oral narrations. Accordingly many questions concerning the history, pragmatics and global significance of message stick communication remain unanswered. To address this we have compiled the Australian Message Stick Database, a new resource hosted at the Max Planck Institute for Evolutionary Anthropology, Leipzig, and The Australian National University, Canberra. It contains images and data for over 1500 individual message sticks sourced from museums, and supplemented with information derived from published and unpublished manuscripts, private collections, and from field recordings involving contemporary Indigenous consultants. For the first time, knowledge about Australian message sticks can be evaluated as a single set allowing scholars and Traditional Owners to explore previously intractable questions about their histories, meanings and purposes.

Reconstructing human history from ancient genomes: an interview with Nobel laureate Svante Pääbo.

Professor Svante Pääbo, Director of the Max Planck Institute for Evolutionary Anthropology, won the Nobel Prize in Physiology or Medicine in 2022 for his discoveries in ancient hominine genomes and human evolution. His pioneering work in sequencing and interpreting the paleo genomes of Neanderthals and Denisovans, as well as their relationship with the modern human genome, was groundbreaking in terms of our understanding of human origins. Nowadays, we can even use commercial kits to easily detect the proportion of Neanderthal genes in our own genomes. Recently, NSR conducted an interview with Professor Pääbo to learn about his interesting work chasing the ancient genomes and reconstructing human evolutionary and migration history from the DNA evidence, as well as his perspective on paleo genome studies and his advice to young researchers: follow your interests and be ready to try some crazy things.

Vascular microforamina and endocranial surface: Normal variation and distribution in adult humans.

The term craniovascular traits refers to the imprints left by arteries and veins on the skull bones. These features can be used in biological anthropology and archaeology to investigate the morphology of the vascular network in extinct species and past populations. Generally, the term refers to macrovascular features of the endocranial cavity, like those associated with the middle meningeal artery, venous sinuses, emissary foramina, and diploic channels. However, small vascular passages (here called microforamina or microchannels) have been occasionally described on the endocranial surface. The larger ones (generally with a diameter between 0.5 and 2.0 mm) can be detected through medical scanners on osteological collections. In this study, we describe and quantify the number and distribution of these microforamina in adult humans (N = 45) and, preliminarily, in a small sample of children (N = 7). Adults display more microchannels than juvenile skulls. A higher frequency in females is also observed, although this result is not statistically significant and might be associated with allometric cranial variations. The distribution of the microforamina is particularly concentrated on the top of the vault, in particular along the sagittal, metopic, and coronal sutures, matching the course of major venous sinuses and parasagittal bridging veins. Nonetheless, the density is lower in the region posterior to bregma. Beyond oxygenation, these vessels are likely involved in endocranial thermal regulation, infection, inflammation, and immune responses, and their distribution and prevalence can hence be of interest in human biology, evolutionary anthropology, and medicine.

'Our Roots Run Deep': Historical Myths as Culturally Evolved Technologies for Coalitional Recruitment.

One of the most remarkable manifestations of social cohesion in large-scale entities is the belief in a shared, distinct and ancestral past. Human communities around the world take pride in their ancestral roots, commemorate their long history of shared experiences, and celebrate the distinctiveness of their historical trajectory. Why do humans put so much effort into celebrating a long-gone past? Integrating insights from evolutionary psychology, social psychology, evolutionary anthropology, political science, cultural history and political economy, we show that the cultural success of historical myths is driven by a specific adaptive challenge for humans: the need to recruit coalitional support to engage in large scale collective action and prevail in conflicts. By showcasing a long history of cooperation and shared experiences, these myths serve as super-stimuli, activating specific features of social cognition and drawing attention to cues of fitness interdependence. In this account, historical myths can spread within a population without requiring group-level selection, as long as individuals have a vested interest in their propagation and strong psychological motivations to create them. Finally, this framework explains, not only the design-features of historical myths, but also important patterns in their cross-cultural prevalence, inter-individual distribution, and particular content.

Mechanistic Explanation, Interdisciplinary Integration and Interpersonal Social Coordination

ABSTRACT Prominent research programs dealing with the nature and mechanisms of interpersonal social coordination have emerged in cognitive science, developmental psychology and evolutionary anthropology. I argue that the mechanistic approach to explanation in contemporary philosophy of science can facilitate interdisciplinary integration and division of labor between these different disciplinary research programs. By distinguishing phenomenal models from mechanistic models and structural decomposition from functional decomposition in the process of mechanism discovery, I argue that behavioral and cognitive scientists can make interlocking contributions to families of mechanism models representing a) what central forms of interpersonal social coordination consist in, b) what types of agents engage in such forms of coordination, c) what types of cognitive mechanisms give rise to such forms of coordination, d) how the operation of such mechanisms is modulated by the natural and social environments that the agents populate. Thus mechanistic philosophy of science can play a heuristic role in guiding the research strategies of scientists in different scientific disciplines in a manner that is complementary to the research strategies of scientists in other disciplines and thereby efficient from the point of view of the division of epistemic labor.

Dyadic inter-group cooperation in shotgun hunting activities in a Congo Basin village.

Understanding the dynamics of inter-group cooperation in human adaptation has been the subject of recent empirical and theoretical studies in evolutionary anthropology, beginning to fill gaps in our knowledge of how interactions across political, economic and social domains can - and often do - lead to stable, large-scale cooperation. Here we investigate dyadic intergroup cooperation in shotgun hunting in the Republic of the Congo. In the Congo Basin, inter-group cooperation between foragers and farmers is at the centre of an exchange system maintained by traditional norms and institutions such as fictive kinship. Here, we focused on what factors predict cooperative shotgun hunting exchanges between BaYaka and Yambe. We conducted structured interviews with 48 BaYaka hunters and 18 Yambe men who organise hunts in a village along the Motaba River. We used Bayesian multilevel regression models to investigate the influence of Yambe and BaYaka attributes on probability of dyadic cooperation. We found that BaYaka men's reputations as skilled hunters and their family size each predicted cooperation in shotgun hunting, whereas there was no effect of Yambe attributes (status, wealth, family size). We discuss the results in terms of evolutionary models of men as hunters and inter-group cooperation, as well as biodiversity conservation implications.

Human behaviors driving disease emergence.

Interactions between humans, animals, and the environment facilitate zoonotic spillover-the transmission of pathogens from animals to humans. Narratives that cast modern humans as exogenous and disruptive forces that encroach upon "natural" disease systems limit our understanding of human drivers of disease. This review leverages theory from evolutionary anthropology that situates humans as functional components of disease ecologies, to argue that human adaptive strategies to resource acquisition shape predictable patterns of high-risk human-animal interactions, (2) humans construct ecological processes that facilitate spillover, and (3) contemporary patterns of epidemiological risk are emergent properties of interactions between human foraging ecology and niche construction. In turn, disease ecology serves as an important vehicle to link what some cast as opposing bodies of theory in human ecology. Disease control measures should consider human drivers of disease as rational, adaptive, and dynamic and capitalize on our capacity to influence ecological processes to mitigate risk.

Developing evolutionary anthropology in local ecosystems.

The traditional regional focus of evolutionary anthropology-typically defined as places where hominin fossils, nonhuman primates, and non-western populations reside-forms the basis of much evolutionary anthropological research. Using the highly biodiverse temperate region of Appalachia as an example, we suggest that evolutionary anthropologists have much to gain by stepping outside of this traditional geographic area. Being purposely provocative, we argue that evolutionary anthropologists might also benefit from conducting research in Appalachia and other temperate ecosystems. We briefly discuss multiple areas of study-including studies of seed dispersal, functional redundancy, convergent evolution, human behavioral ecology, and conservation-and how they can be considered within the purview of integrative and evolutionary anthropology. We also highlight broader impacts to higher education that evolutionary anthropologists can help promote by working in local ecosystems.

Synthesizing Historical Research Leads to a Simple, Compatible, and Extensible Big History Framework and Periodization

Many questions remain unanswered regarding how Big History events should be organized and interpreted. For example, should Big History be divided into periods or processes, when it is clearly a complex process of simultaneous interacting processes? In such an uncertain environment, how are models constructed and evaluated? When we look at Big History, at what level of abstraction do we start? This paper gleans important insights from a number of historical papers to develop a consistent view of Big History. It is important to consider many aspects of an evolving system. For example, how does the evolving system 1) learn from its experiences in the environment; 2) extract energy and resources to combat the trend towards chaos and higher entropy; 3) organize itself at multiple levels to meet new challenges? Various traditional scholarly disciplines contribute to various aspects of Big History, including astronomy, geology, evolutionary biology, evolutionary anthropology, and the history of civilizations. This suggests a base framework of cosmic and terrestrial phases. The terrestrial phase saw the sequential evolution of life, humans, and civilization. Based on this framework, the various disciplines’ timelines are consolidated along with their dynamic systems models. This base framework is then expanded to include more details. This simple approach meets many criteria for an effective framework: it integrates with knowledge from other disciplines; it provides a simple, understandable model; it can be extended in detail with nested transitions; and it immediately expresses the acceleration of evolving complex adaptive systems (CAS). Similarly, proposed frameworks offer slightly different perspectives.

Next-generation primate genomics: New genome assemblies unlock new questions

Nonhuman primates provide unique evolutionary and comparative insight into the human phenotype. Genome assemblies are now available for nearly half of the species in the primate order, expanding our understanding of genetic variation within and between species and making important contributions to evolutionary biology, evolutionary anthropology, and human genetics.

Punctuated equilibrium at 50: Anything there for evolutionary anthropology? Yes; definitely.

The theory of punctuated equilibrium (PE) was developed a little over 50 years ago to explain long-term, large-scale appearance and disappearance of species in the fossil record. A theory designed specifically for that purpose cannot be expected, out of the box, to be directly applicable to biocultural evolution, but in revised form, PE offers a promising approach to incorporating not only a wealth of recent empirical research on genetic, linguistic, and technological evolution but also large databases that document human biological and cultural diversity across time and space. Here we isolate the fundamental components of PE and propose which pieces, when reassembled or renamed, can be highly useful in evolutionary anthropology, especially as humanity faces abrupt ecological challenges on an increasingly larger scale.