Each year a number of languages go extinct. A lot of people think that it is not as important as it seems, and is even good thing.
I would never consider this as a good occurrence, but neither would count it as an leading problem of today's world. We live in the era of profit and communication, where the less developed nations, have to move and adapt in the country with better
life conditions. As a result, numerous people forget about their roots, culture and therefore their own language. No more used language is doomed to be forgotten.
For example, you are from one of the countless African tribes. You understand that there is no future on your land, and for the sake of your children you decide to move to more developed city or even country with your family. There certainly no usage of teaching your kids language that is nowhere known or heard of, so you simple don't.
Cowersely, there is known fact that the language is the basis of national identity. Without it, one cannot understand the depth and beauty that certain culture holds. By erasing language, people delete the history, mythology, beliefs and glory of their people. For example, there are many known situations, where the person learns about his or her national identity only in their adolescents, or even old years of life. Many dies without knowing the truth.
In conclusion, the problem of erasing languages is not important, but certainly needs to be more known to bigger society.