Weighing devices are the earliest material correlates of the rational quantification of economic value, and they yield great potential in the study of trade in pre-literate societies. However, the knowledge of European Bronze Age metrology is still underdeveloped in comparison to Eastern Mediterranean regions, mostly due to the lack of a proper scientific debate. This paper introduces a theoretical and methodological framework for the study of standard weight-systems in pre-literate societies, and tests it on a large sample of potential balance weights distributed between Southern Italy and Central Europe during the Bronze Age (second–early first millenniumbc). A set of experimental expectations is defined on the basis of comparisons with ancient texts, archaeological cases and modern behaviour. Concurrent typological, use-wear, statistical and contextual analyses allow to cross-check the evidence against the expectations, and to validate the balance-weight hypothesis for the sample under analysis. The paper urges a reappraisal of an independent weight metrology for Bronze Age Europe, based on adequate methodologies and a critical perspective.

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Weighing technology was invented around 3000 BCE between Mesopotamia and Egypt and became widely adopted in Western Eurasia within ∼2,000 y. For the first time in history, merchants could rely on an objective frame of reference to quantify economic value. The subsequent emergence of different weight systems goes hand in hand with the formation of a continental market. However, we still do not know how the technological transmission happened and why different weight systems emerged along the way. Here, we show that the diffusion of weighing technology can be explained as the result of merchants’ interaction and the emergence of primary weight systems as the outcome of the random propagation of error constrained by market self-regulation. We found that the statistical errors of early units between Mesopotamia and Europe overlap significantly. Our experiment with replica weights gives error figures that are consistent with the archaeological sample. We used these figures to develop a model simulating the formation of primary weight systems based on the random propagation of error over time from a single original unit. The simulation is consistent with the observed distribution of weight units. We demonstrate that the creation of the earliest weight systems is not consistent with a substantial intervention of political authorities. Our results urge a revaluation of the role of individual commercial initiatives in the formation of the first integrated market in Western Eurasia.

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During the Early Iron Age Nuragic Sardinia experienced the rise of monumental public sanctuaries. This study addresses the formation of the votive record in sanctuaries in order to expbre the relationship between socio-economic control and the ritual dynamics of legitimation of authority. In Nuragic sanctuaries, large amounts of wealth were collected in the form of significant accumulations of bronze objects. The accumulation of metal objects in sanctuaries probably reflects a model of elite-controlled wealth redistribution. It is argued that the rise of sanctuaries is part of a planned 'ritual strategy, put in action by Nuragic elites, in order to pursue ideological legitimation to their claims for hegemony. The subject is set within a proposal of a general redefinition of the Nuragic Early Iron Age, making it possible to propose a contextualization of the local phenomenon within the contemporary western Mediterranean framework.

Crises are thresholds in human history, often marking substantial transformations in societies. Crises, however, are not instants in time. They start, unfold, and develop in a process that is often traumatic for social systems, with outcomes ranging from catastrophe to complete recovery. In this article, catastrophic models are employed to understand a non-catastrophic outcome: the complete recovery that nuragic Sardinia experienced after a long crisis, caused in the first place by unsustainable strategies of territorial expansion. Starting from the premises of the ‘Tragedy of the Commons’, it is argued that the transformation of nuragic society was the best way of avoiding the constraints that the social structure imposed on the perspective of a sustainable growth. The study is based on a geostatistical analysis of a large sample of settlements, and it attempts to quantify population growth ratios for the Late Bronze Age.

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