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In 2003, the Workers’ Party took federaloffice in Brazil on an agenda of social inclusion and popular participation. This paper explores attempts to implement that agenda in big infrastructure projects in the Amazon: the BR-163 road and the Belo Monte dam. We argue that overlapping inequalities (between social groups, within the bureaucracy and between territorial centre and periphery) result in uneven state capacities for implementing projects in the Amazon. This framework helps explain why the government has moved much faster in building infrastructure than in implementing participatory social and environmental programmes that would benefit affected local communities. [ABSTRACT FROM PUBLISHER]

In this paper we present new data on the precolumbian geometric ditched enclosures identified in Acre State, western Amazonia, Brazil. Remote sensing and ground survey have revealed 281 earthworks, located mainly on the edges of high plateaus overlooking the river valleys drained by the southeastern tributaries of the Upper Purus River. Excavations have shown that the few existing cultural materials are concentrated on the slopes and in the bottoms of the ditches, as well as on small mounds that were likely remains of houses, whereas the central, flat enclosed areas lack major archaeological features. New radiocarbon dates place the initial stage of earthwork construction as early as ca. 2000 b.p. We suggest that the building of these geometric earthworks may have been a regionally shared phenomenon, especially among the Arawak and the Tacana peoples, who used them for special gatherings, religious activities, and, in some cases, as village sites. [ABSTRACT FROM AUTHOR]