Ethnogenesis is a process of historic construction from interethnic interactions that originate new social categories, in other words, that form groups that distinguish from the rest of society. In Brazil, after the Constitution of 1988, different groups used their ethnogenesis to obtain recognition of their indigenous condition. One of these groups is the Tapuios do Carretão, a community in Brazil's centralwest region inhabited by descendants of indigenous, black, and white people, who speak Portuguese and are recognized by the Brazilian government as an indigenous group. The goal of this paper was to reconstruct an ethnogenesis of the Tapuios indigenous group from a Behavior Analysis perspective, thus improving our comprehension of this group's cultural practices by analyzing the processes that selected them. Behavior-analytical concepts would allow us to further understand changes in cultural practices that occurred due to colonization. Finally, we discuss the importance of laws in planning and changing cultures. For Brazilian indigenous groups, consequences such as the right to land and other benefits had an important role in encouraging members of indigenous communities to seek recognition of their condition.
KEYWORDS: cultural Practices, metacontingency, macrocontingency, Tapuios do CarretãoThe Brazilian census in 2010 estimated that in Brazil there are 896,917 indigenous inhabitants distributed in 246 indigenous groups (Brasil, 2010). Before the Portuguese colonization, it is estimated that there were over a thousand indigenous groups adding to about 4 million indigenous people (Ossaimi de Moura, 2008). The colonization of Brazil by Portugal did not only decimate the indigenous population; it produced changes in cultural practices that facilitated the creation of