From the article: "Fitch’s experiments were inconclusive on the subject of whether Chomsky’s universal grammar applied to the Pirahã"
And Tecumseh Fitch is the one who developed a concept of Recursion in linguistics.
How do you explain that?
"Vocal learning, the substrate of human language, is a very rare trait. It is known to be present in only 6 groups of animals: 3 groups of birds (parrots, songbirds, and hummingbirds) and 3 groups of mammals (bats, cetaceans[whales/dolphins], and humans).
All other groups of animals are thought to produce genetically innate vocalizations.
To understand this concept, it is important to distinguish vocal learning from auditory learning. Auditory learning is the ability to make sound associations, such as a dog learning how to respond to the sound "sit". All vertebrates have auditory learning.
Vocal learning is the ability to imitate sounds that you hear, such as a human or a parrot imitating the sound "sit". Currently only vocal learners have been found to have forebrain regions dedicated to vocal learning and production of these learned vocalizations. Vocal non-learners only have been found to have non-forebrain vocal regions responsible for the production of innate vocalizations." http://www.jarvislab.net/Evolution.html
I think it all depends on people's personality type. Extrovert will be more successful when he lives in a startup hotbed.
Introvert doesn't need anybody, he can live anywhere he likes.