Anthropologist and Professor at the Federal University of Rio de Janeiro/UFRJ. Did field research extended with Tikuna Indians of Alto Solimões (Amazon), which resulted in your dissertation (UNB, 1977) and your Ph.d. thesis (PPGAS, 1986), published in 1988. Also research on public policy, coordinating a broad monitoring project of indigenous lands in Brazil (1986-1994), with support from the Ford Foundation, project that resulted in many analytical works, anthologies and atlases.

Guided more than 60 theses and dissertations in the graduate program in Social Anthropology (PPGAS), geared especially to indigenous peoples of the Amazon and Northeast, in comparative research program on ethnicity and territory supported by CNPq and FINEP. He served as a visiting professor in some graduate and research centers in Brazil (UNICAMP, UFPE, UFBA and Joaquim Nabuco Foundation and UFAM) and abroad (Universidad Nacional de La Plata/Argentina, Università di Roma La Sapienza, École des Hautes Études en Sciences Sociales/ Paris, Universidad Nacional de San Martin/UNSAM/Buenos Aires and Institute des Hautes Etudes de l ‘ Amérique Latine IHEAL/Sorbonne Nouvelle/;/Paris 3).

Researcher 1A National Research Council/CNPq and FAPERJ program Scientist scholarship of our State. He was President of the Brazilian Association of anthropology/tab (1994/1996) and several times Coordinator of the Committee on Indian Affairs. In recent years has been devoted to the study of issues related to anthropology of colonialism and historical anthropology, developing work related to the process of national education, historiography, as well as the museums and ethnographic collections. Is curator of the ethnological collections of the National Museum and organized the first Brazilian exposure recently, relating to indigenous people in the Northeast, displayed in Recife, Fortaleza and Rio de Janeiro, currently at the Museo de Bellas Artes Evita, in Cordoba (Argentina). Along with indigenous leaders was one of the founders of the Maguta: Centre for documentation and research of the Alto Solimões, based in Benjamin Constant (AM), which gave rise to the Maguta Museum, administered directly by the indigenous movement today.