Archaeology of ancient China's periphery has traditionally been examined through the historiographic lens of Chinese textual sources. Social developments in the periphery are often explained in relation to accounts of migration from ''core'' regions of China. Setting conventional paradigms and textual sources aside, this article examines prehistoric developments in southwestern China in conjunction with broader trends in Southeast Asia. This comparative approach reveals that the development of bronze metallurgy in southwestern China parallels trends observed among Neolithic communities in Southeast Asia. Using recent data and a reassessment of radiocarbon dates for the Bronze Age, I propose that sociopolitical complexity emerged in southwestern China as part of a multiregional phenomenon that had its beginning with the formalization of trade networks during the Neolithic period.
In the 12,000 years preceding the Industrial Revolution, human activities led to significant changes in land cover, plant and animal distributions, surface hydrology, and biochemical cycles. Earth system models suggest that this anthropogenic land cover change influenced regional and global climate. However, the representation of past land use in earth system models is currently oversimplified. As a result, there are large uncertainties in the current understanding of the past and current state of the earth system. In order to improve representation of the variety and scale of impacts that past land use had on the earth system, a global effort is underway to aggregate and synthesize archaeological and historical evidence of land use systems. Here we present a simple, hierarchical classification of land use systems designed to be used with archaeological and historical data at a global scale and a schema of codes that identify land use practices common to a range of systems, both implemented in a geospatial database. The classification scheme and database resulted from an extensive process of consultation with researchers worldwide. Our scheme is designed to deliver consistent, empirically robust data for the improvement of land use models, while simultaneously allowing for a comparative, detailed mapping of land use relevant to the needs of historical scholars. To illustrate the benefits of the classification scheme and methods for mapping historical land use, we apply it to Mesopotamia and Arabia at 6 kya (c. 4000 BCE). The scheme will be used to describe land use by the Past Global Changes (PAGES) LandCover6k working group, an international project comprised of archaeologists, historians, geographers, paleoecologists, and modelers. Beyond this, the scheme has a wide utility for creating a common language between research and policy communities, linking archaeologists with climate modelers, biodiversity conservation workers and initiatives.
Surface collection, exposed sections and the use of irrigation wells and channels enabled the authors to map the settlement pattern of the elusive Dian kingdom before it became a subsidiary of the Han empire. The pattern showed that the Dian were already hierarchical, with settlements of different sizes and a political centre in which ritual bronzes featured. The empire redrew the landscape, with settlement migrating away from the wetlands into the hills where it could oversee the routes of communication into Southeast Asia.
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