Diversity of languages is not some sort of a negative outcome of past mistakes, but rather it is a blessing for the humanity.
This episode of Freakonomics Radio talks about a “modern-day Tower of Babel” which refers to the problems we have due to the existence of a variety of languages. Linguistic diversity here is viewed through different lenses: as a curse and as a blessing.
Some important people, from professors of established institutions to a director of a respective school talked about this astonishing phenomenon. 7000 languages are reported to exist in present times, but some of the speakers expressed concern that by the next century half of these languages are going to be extinct. The main reason for that was said to be the English language, which hegemony is spreading like a wild fire. Is it a bad thing? Taking into account that there are tons of money spent on translation of documents into different languages we might conclude that financially it would be better to have one standard language common for all. Probably, this was a main reason for creating an artificial language Esperanto and it was a failure. Linguistic diversity, if not financially, but cognitively could be very useful. In this regard, the speakers in this podcast expressed opinion that speaking more than one language has certain benefits: delay Alzheimer, shape thinking, enhance memory etc. Although, these advantages are questionable I choose to believe it. Why not?
A lot of ideas were expressed in this podcast, mostly I heard how inconvenient the linguistic diversity is. Speaking the same language may help to eradicate certain problems, but every language is unique in its own way and there is no way we can choose one among many to be spoken by the whole world.