Anthropology and Indigenist Policies in Brazil, Canada, and Australia 
This article examines some of the challenges faced by social anthropology with Indigenous peoples in Brazil, in Canada and in Australia, in recent decades, focusing on situations of interethnic contact between Indigenous peoples and national States where the intervention of anthropologists takes place through politically engaged research. In all three countries, Indigenous political protagonism has become stronger since the consolidation of Indigenous political movements from the 1970s, at the same time in which giant mining companies, hydroelectric construction companies, timber, agricultural industries and cattle raising projects increasingly covet the natural resources on Indigenous Lands. The anthropologist Works in highly politicized situations in which s/he interacts with social agents both Indigenous and from the national society, both from the government and from companies which operate on Indigenous Lands. One of the roles played by the anthropologist is to interpret the complex situations of government and entrepreneurial indigenist interventions, analysing and contextualising the various opinions of the social agents who are involved.