Ancient Reality
The political economy of the original “Thucydides’ Trap”: A conflict economics perspective on the Peloponnesian war
George Tridimas
Public Choice, forthcoming
Abstract:
The Peloponnesian War, 431–404, between democratic Athens and oligarchic Sparta was a long, destructive war ending with the total surrender of Athens. Scholars of Thucydides, the ancient historian of the conflict, have dwelt on two different explanations of the causes of the War. First, the “Thucydides’ Trap”, which argues that Sparta’s fear of the growing power of Athens rendered peace arrangements non-credible and made war inevitable. Second, the unwise leadership, which blames key political leaders for their erroneous judgments in the affairs of the state. Using the perspective of the economics of conflict the present study questions both views. It argues that the non-credibility of peace is at best an incomplete explanation of the conflict, and the unwise leadership hypothesis requires a systematic account of the factors affecting leaders to choose war. Noting that the clash between Sparta and Athens had started earlier, in 460, the study shows that its causes related to calculations of material and non-material benefits from victory, perceptions of the probability of military success, problems of domestic political accountability, and the valuation of the future. Importantly, it also shows that the role of these factors differed significantly at the different phases of the extended conflict.
Archaeological evidence of an ethnographically documented Australian Aboriginal ritual dated to the last ice age
Bruno David et al.
Nature Human Behaviour, forthcoming
Abstract:
In societies without writing, ethnographically known rituals have rarely been tracked back archaeologically more than a few hundred years. At the invitation of GunaiKurnai Aboriginal Elders, we undertook archaeological excavations at Cloggs Cave in the foothills of the Australian Alps. In GunaiKurnai Country, caves were not used as residential places during the early colonial period (mid-nineteenth century CE), but as secluded retreats for the performance of rituals by Aboriginal medicine men and women known as ‘mulla-mullung’, as documented by ethnographers. Here we report the discovery of buried 11,000- and 12,000-year-old miniature fireplaces with protruding trimmed wooden artefacts made of Casuarina wood smeared with animal or human fat, matching the configuration and contents of GunaiKurnai ritual installations described in nineteenth-century ethnography. These findings represent 500 generations of cultural transmission of an ethnographically documented ritual practice that dates back to the end of the last ice age and that contains Australia’s oldest known wooden artefacts.
Recurrent gene flow between Neanderthals and modern humans over the past 200,000 years
Liming Li et al.
Science, 12 July 2024
Abstract:
Although it is well known that the ancestors of modern humans and Neanderthals admixed, the effects of gene flow on the Neanderthal genome are not well understood. We develop methods to estimate the amount of human-introgressed sequences in Neanderthals and apply it to whole-genome sequence data from 2000 modern humans and three Neanderthals. We estimate that Neanderthals have 2.5 to 3.7% human ancestry, and we leverage human-introgressed sequences in Neanderthals to revise estimates of Neanderthal ancestry in modern humans, show that Neanderthal population sizes were significantly smaller than previously estimated, and identify two distinct waves of modern human gene flow into Neanderthals. Our data provide insights into the genetic legacy of recurrent gene flow between modern humans and Neanderthals.
Repeated plague infections across six generations of Neolithic Farmers
Frederik Valeur Seersholm et al.
Nature, forthcoming
Abstract:
In the period between 5,300 and 4,900 calibrated years before present (cal. BP), populations across large parts of Europe underwent a period of demographic decline. However, the cause of this so-called Neolithic decline is still debated. Some argue for an agricultural crisis resulting in the decline, others for the spread of an early form of plague. Here we use population-scale ancient genomics to infer ancestry, social structure and pathogen infection in 108 Scandinavian Neolithic individuals from eight megalithic graves and a stone cist. We find that the Neolithic plague was widespread, detected in at least 17% of the sampled population and across large geographical distances. We demonstrate that the disease spread within the Neolithic community in three distinct infection events within a period of around 120 years. Variant graph-based pan-genomics shows that the Neolithic plague genomes retained ancestral genomic variation present in Yersinia pseudotuberculosis, including virulence factors associated with disease outcomes. In addition, we reconstruct four multigeneration pedigrees, the largest of which consists of 38 individuals spanning six generations, showing a patrilineal social organization. Lastly, we document direct genomic evidence for Neolithic female exogamy in a woman buried in a different megalithic tomb than her brothers. Taken together, our findings provide a detailed reconstruction of plague spread within a large patrilineal kinship group and identify multiple plague infections in a population dated to the beginning of the Neolithic decline.
The chronology of the human colonization of the Canary Islands
Jonathan Santana et al.
Proceedings of the National Academy of Sciences, 9 July 2024
Abstract:
The human colonization of the Canary Islands represents the sole known expansion of Berber communities into the Atlantic Ocean and is an example of marine dispersal carried out by an African population. While this island colonization shows similarities to the populating of other islands across the world, several questions still need to be answered before this case can be included in wider debates regarding patterns of initial colonization and human settlement, human–environment interactions, and the emergence of island identities. Specifically, the chronology of the first human settlement of the Canary Islands remains disputed due to differing estimates of the timing of its first colonization. This absence of a consensus has resulted in divergent hypotheses regarding the motivations that led early settlers to migrate to the islands, e.g., ecological or demographic. Distinct motivations would imply differences in the strategies and dynamics of colonization; thus, identifying them is crucial to understanding how these populations developed in such environments. In response, the current study assembles a comprehensive dataset of the most reliable radiocarbon dates, which were used for building Bayesian models of colonization. The findings suggest that i) the Romans most likely discovered the islands around the 1st century BCE; ii) Berber groups from western North Africa first set foot on one of the islands closest to the African mainland sometime between the 1st and 3rd centuries CE; iii) Roman and Berber societies did not live simultaneously in the Canary Islands; and iv) the Berber people rapidly spread throughout the archipelago.