An Indigenous community living along the Maici River in the Brazilian Amazon, known for their unique language, which lacks recursion and is central to Everett’s studies.

An influential American linguist whose theory of universal grammar is directly challenged by Everett’s research on the Pirahã language.

Daniel L. Everett’s wife, who played a crucial role in supporting their fieldwork in the Amazon, managing family logistics and collaborating on research efforts.

A Brazilian agency responsible for protecting Indigenous peoples, whose work on mapping Pirahã territory is depicted in the narrative.

A missionary who was among the first to establish contact with the Pirahã and produce phonemic analyses and orthography for their language.

A missionary who lived among the Pirahã in the late 1960s and 1970s, providing foundational analyses of their language that supported Everett’s later research.