Sean S Downey

The Ohio State University | OSU · Aeronautical and Astronautical Research Laboratories

Significance This study explores whether archaeologically detectable declines in resilience precede the onset of large-scale human population collapses. Our case study is the European Neolithic: a period that began approximately 9,000 y ago when the introduction of agricultural technologies initiated phases of rapid population growth that were in m...

This study reconstructs the settlement history for twelve related Q'eqchi' Maya villages in the Toledo District of southern Belize using oral history interviews, archival records, and the Catholic parish birth register. The study evaluates two hypotheses for explaining the identified patterns: carrying capacity, which suggests that increasing villa...

Across the planet, Indigenous societies control, use, and manage large tracts of tropical forest that are crucial for combating climate change. Here we investigate whether customary Indigenous agricultural practices can increase forest species diversity using swidden (aka, slash-and-burn) agriculture. We examine the community lands surrounding two...

Theories of early cooperation in human society often draw from a small sam- ple of ethnographic studies of surviving populations of hunter-gatherers, most of which are now sedentary. Borneo hunter-gatherers (Punan, Penan) have seldom figured in comparative research because of a decades-old controversy about whether they are the descendants of farme...

Humanity faces a number of wicked problems, from global climate change and the coronavirus pandemic to systemic racism and widening economic inequality. Since such complex and dynamic problems are plagued by disagreement among stakeholders over their nature and cause, they are notoriously difficult to solve. This commentary argues that if humanity...

We review and contrast three frameworks for analyzing human-land interactions in the Holocene: the traditional concept of favored and disfavored landscapes, the new concept of ResourceCultures from researchers at University of Tübingen, and complex adaptive systems, which is a well-established contemporary approach in interdisciplinary research. Fo...

We investigated the coupled social and ecological dynamics of swidden agriculture through a common property resource field experiment framed as a game with realistic social norms and ecological dynamics. We tested the hypothesis that community social norms related to labor reciprocity and graduated sanctioning may encourage sustainable swidden cult...

Current theoretical models of the commons assert that common-pool resources can only be managed sustainably with clearly defined boundaries around both communities and the resources that they use. In these theoretical models, open access inevitably leads to a tragedy of the commons. However, in many open-access systems, use of common-pool resources...

Colluvial deposits, as the correlate sediments of human-induced soil erosion, depict an excellent archive of land use and landscape history as indicators of human–environment interactions. This study establishes a chronostratigraphy of colluvial deposits and reconstructs past land use dynamics in the Swabian Jura, the Baar and the Black Forest in S...

Significance Associations between genes and languages occur even with sustained migration among communities. By comparing phylogenies of genes and languages, we identify one source of this association. In traditional tribal societies, marriage customs channel language transmission. When women remain in their natal community and men disperse (matril...

Indonesia, an island nation as large as continental Europe, hosts a sizeable proportion of global human diversity, yet remains surprisingly undercharacterized genetically. Here, we substantially expand on existing studies by reporting genome-scale data for nearly 500 individuals from 25 populations in Island Southeast Asia, New Guinea, and Oceania,...

Soils are the basis of our food production, supplying plants with nutrients and water. Farming leaves traces in the soil because cultivation can cause soil erosion. One result is the formation of colluvial deposits, which can be used as geoarchives of past human impacts on their terrestrial environment. The present study combines pedological and ar...

Linguistic distance measurements are commonly used in anthropology and biology when quantitative and statistical comparisons between words are needed. This is common, for example, when analyzing linguistic and genetic data. Such comparisons can provide insight into historical population patterns and evolutionary processes. However, the most commonl...

It has long been recognised that the proportions of Neolithic domestic animal species-cattle, pig and sheep/goat-vary from region to region, but it has hitherto been unclear how much this variability is related to cultural practices or to environmental constraints. This study uses hundreds of faunal assemblages from across Neolithic Europe to revea...

Analysis of the proportion of immature skeletons recovered from European prehistoric cemeteries has shown that the transition to agriculture after 9000 BP triggered a long-term increase in human fertility. Here we compare the largest analysis of European cemeteries to date with an independent line of evidence, the summed calibrated date probability...

Timor, an eastern Indonesian island linking mainland Asia with Australia and the Pacific world, had a complex history, including its role as a contact zone between two language families (Austronesian and Trans-New Guinean), as well as preserving elements of a rich Austronesian cultural heritage, such as matrilocal marriage practices. Using an array...

Following its initial arrival in SE Europe 8,500 years ago agriculture spread throughout the continent, changing food production and consumption patterns and increasing population densities. Here we show that, in contrast to the steady population growth usually assumed, the introduction of agriculture into Europe was followed by a boom-and-bust pat...

This chapter discusses the application of "complexity" into anthropology studies. By tracing patterns of interaction among the elements of a system, one can sometimes discover emergent properties at a higher level. This phenomenon is common to all of the examples, from semiotics to agency, innovation, cultural evolution and human-environmental inte...

Despite the fact that swidden agriculture has been the subject of decades of research, questions remain about the extent to which it is constrained by demographic growth and if it can adapt to environmental limits. Here, social network analysis is used to analyze farmer labor-exchange networks within a chronosequence of five Q'eqchi' Maya villages...

The early history of island Southeast Asia is often characterized as the story of two major population dispersals: the initial Paleolithic colonization of Sahul approximately 45 ka ago and the much later Neolithic expansion of Austronesian-speaking farmers approximately 4 ka ago. Here, in the largest survey of Indonesian Y chromosomes to date, we p...

Ethnohistory, genetics and simulation are used to propose a new 'budding model' to describe the historical processes by which complex irrigation communities may come into existence. We review two alternative theories, Wittfogel's top-down state-formation theory and common-pool resource management, and suggest that a budding model would better accou...

Resilient networks and and the historical ecology of Q'eqchi' Maya swidden agriculture

Historical relationships among languages are used as a proxy for social history in many non-linguistic settings, including the fields of cultural and molecular anthropology. Linguists have traditionally assembled this information using the standard comparative method. While providing extremely nuanced linguistic information, this approach is time-...

Numerous studies indicate strong associations between languages and genes among human populations at the global scale, but all broader scale genetic and linguistic patterns must arise from processes originating at the community level. We examine linguistic and genetic variation in a contact zone on the eastern Indonesian island of Sumba, where Neol...

In this paper I use a simulation model of Learning to Labor (Willis 1981) to critique Giddens’ structuration theory (Giddens 1984). The simulation model represents interactions between a group of non-conformist boys from Birmingham, England and an industrial capitalist business. I present the results of three simulation experiments designed to test...