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Abstract. This article aims to integrate different explanatory approaches to ethnic conflicts: studies on ethnic clientelism and discrimination, on political mobilisation by minority elites, on unequal relations between ethnoregions, and on the effects that different political systems have on the dynamics of ethnic conflicts. For each of these approaches, the relevant research is reviewed and illustrated by selected examples from post-imperial societies. Propositions that seem empirically plausible are integrated into a comparative model which is in turn based on a specific theory of political modernity. The premise holds that the politicisation of ethnicity is to be interpreted as a central aspect of modem state-building. For only when ‘people’ and state are mutually related within the ideal of a legitimate order does the question arise for which ethnic group the state has to act, who is regarded as its legitimate owner, and who is entitled to have access to its services. Ethnic conflicts can thus be interpreted as struggles for the collective goods of the nation-state. Within this paradigmatical frame, a step-by-step analysis at a medium level of abstraction tries to show under which conditions state-building leads to an ethnicisation of political conflicts and in some cases to an escalation into rebellions and wars.  相似文献   
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The Late Chalcolithic (4400–3950 b.c.) occupation levels from Ovçular Tepesi have yielded a significant assemblage of copper objects and remains of copper production. Together with ore finds, two fragments of nozzle, crucible remains, and a number of small metal artifacts, this assemblage includes the unexpected discovery of three copper axes in an infant burial jar. These axes are the earliest examples of large copper tools known to date in southwestern Asia, whether it is in the Caucasus, Iran, or the Anatolian highlands. More importantly, the fact that these objects were locally produced suggests that significant metallurgical activities were being carried out at Ovçular as early as the second half of the 5th millennium b.c. After presenting the evidence from Ovçular Tepesi, this paper will proceed to a reassessment of the available archaeological and geochemical data concerning the emergence of extractive metallurgy in the southern Caucasus.  相似文献   
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Foreign knowledge being tested: European physicians fighting the Moscow plague of 1771. – The transfer of Western medicine to Russia increased significantly in the Eighteenth century. Foreign doctors were employed, their writings translated, their education standards copied. But who regarded that knowledge as superior and why? Taking the Moscow Plague of 1771 as a case study, this article examines the crucial role foreign and Russian medical practitioners played during the epidemic. It argues that especially those ideas and practices that were useful for social control filtered into politics and public discourse, but failed to convince the majority of the population.  相似文献   
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Birch tar was the first adhesive produced by humans. Its study has consequences for our understanding of human evolution and the development of specialised craftsmanship. One of the better-documented birch tar making methods is the ‘double-pot’ technique, where two containers are used, one containing bark, the other collecting the tar. Birch tar made with double-pots has low viscosity and bad adhesive properties. To obtain a usable adhesive, it must be reduced in volume by cooking. We investigate the evolution of tar’s mechanical properties during cooking. We use lap-shear tests to investigate strength, stiffness and failure behaviour. We found that tar must be cooked for 90 min to acquire adhesive properties. When cooked for longer, strength and stiffness increase over a 30 min lasting time span. Cooking for even longer, beyond this 30 min window, produced a substance that could no longer be used as an adhesive. The implications are that tar cooking requires a high level of skill because specific signs indicating the desired properties must be recognised during the process. Tar cooking constitutes a supplementary investment in time and resources and appears to be associated with a certain degree of risk.  相似文献   
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