Would you want one common "world language"?

I think a 'common' language, world-wide, would be beneficial in so many ways. Bringing together cultures that would otherwise have no way to truly interact. Communication would reach a great level, which would improve understanding and acceptance of other cultures.

Some would argue that this would rob people of their natural heritage and culture. I think it would be important to stress the teaching and use of the natural language, so as to avoid this pitfall. Preserving the cultures of the world is very important, and with the right kind of precautions.

So, yes, I would promote a common language, as long as we could develop a system that would not damage the uniqueness of the individual cultures.

Love would be the common language. KIDDING!!!!! The most common world language is that of whatever is the dominant culture. That has varied. Once upon a time it was Latin, and when the Roman Empire disintegrated, Latin splintered into Italian, Spanish, Portuguese, French, etc. Today the common language is English. Tomorrow it will perhaps be one of the Chinese languages. Or whatever cockroaches speak after humanity dies off after the human population bomb explodes.

BTW, there have been attempts to get constructed languages such as Esperanto accepted universally, but those attempts have gone nowhere. Those speaking the dominant language see no need to change, and every wog in the world clings to their little tribal clan-speak. (Just like everyone clings, usually, to whatever crazy religion -- Judaism, Christianity, Islam, Hinduism... -- they were indoctrinated into as a child.)