Edward Sapir, in the early 1900's, first identified the concept that language defines the way a person behaves and thinks. He believed that language and thoughts, that we have, are somehow interwoven, and that all the people are equally being effected by the confines of their language. In short, he belived that all the people out there are mental prisoners; unable to think freely because of the restrictions of their vocabularies.
Sapir’s student, Benjamin Whorf, picked up the idea of linguistic determinism and made it his own, and created what was called afterwards the Sapir-Whorf hypothesis. It states that language is not, simply, a way of voicing ideas, but is also the very thing which shapes those ideas. One cannot think outside the confines of their language. The result of this process is many different world views by speakers of