Would it not be true to say that these dialects and languages were created by the isolation of communities, each person in the community could understand the other but as these seperate communities developed isolated from other communities the language morphed into dialects which would be unnatural, unhelpful and unsustainable if all the communities were suddenly drawn back together? Its considered good that all those in each community can understand each other but now that we are a global community surely it would be great to all understand each other and restore natural order for communities of any size.

Lanugage is not a behaviour, its a seperate function of our innate ability to communicate. Customs and traditions are behavioural and dont depend on language, once the language modifies itself naturally and at the proper pace, there need not be any impact on customs, traditions and differences. When Gaelic was eradicated from irish teaching it seperated generations and cut off traditions, thats a different thing from natural development so I dont think you can compare natural development to forced change and come up with a conclusion that what happened under imperialism or whatever in the past has any relation to todays changing language.

I would also think a common language would be helpful to resist parasitic 'globalisation', it would be of huge benifit for organisation and sharing of information and would be a more powerful tool for a small community to communicate with the rest of the world rather than relying on our western media to translate into what we are supposed to hear. It would have been great to hear Iraqi voices on the streets of Baghdad rather than hearing unintelligible chants translated into 'Thank you George and Tony'. In Tiananmen square they built a statue of liberty as it was a universal symbol of 'democracy', a universal language to let people around the world hear what they had to say would have been more benificial I think.