> Esperanto creates a kind of "level playing field," because it's a second language for almost everyone who speaks it, says Humphrey Tonkin. It doesn't. It is entirely based on European and Western culture. Language have huge influent on thought process, and it seems that thought process needed for Esperanto is a Western-centric.
I believe that Sapir–Whorf hypothesis has been considered unfounded and a meme for a long time now. It sort of makes sense, but strangely I don't think there is any evidence for such a thing.