death of language vs. the death of culture

Despite the inevitable threat of globalization and the unifying of tongues that it brings, I think we should definitely care about dying languages. Through unique languages unique culture is expressed and perhaps with the death of a language also comes the death of that particular culture. I think that we should care because it is important to perserve culture. Some have said that it is better for us all to speak one language, or similiar languages but I don't believe that is the case. Many speakers of these "dying languages" are members of self sufficient communities. So why should we force these people, who can take care of themselves, to abandon their culture and conform? These languages have obviously survived for hundreds, maybe thousands, of years and I don't think that there should be any reason to not support them in the future.
Language is very important to cultural identity, perhaps they are even synonymous. Language is how we express ourselves and how we express ourselves is essentially our cultural identity. The traditions, rituals, stories, and history of individual language groups dies along with the language if we do nothing to record or preserve it.