The antrophology debate around the studies of the Piraha: an Amazon culture

In the amazon, lives a small group of people who build a culture called  Pirahã, that has been in the middle of one of the most problematic scientific discussion.

Daniel Everett (Professor of Phonetics and Phonology at the University of Manchester) published his study in the Current Anthropology (2005) magazine, which deals with the strange cultural conformation and the most fundamental cognitive categories of this tribu, based on a extensive field work. 

In this investigation, Everett argues strongly the theory of universal grammar, postulated by Noam Chomsky (the most respeted linguist in the present). He also made a strongly review to other widely accepted and respected postulates in the cognitive sciences, arguing that there were certain limitations in the cultural matrix of the Piranha (such as, for example, inability to account in their culture). This further deepened the discussion, since it had passed ethical parameters.

He discussion it's basically the debate about Sapir and Whorf's  linguistic relativism against the universalism of Chomskian court.