There are many vital reasons why we should care about the loss of biocultural diversity:.
First, we are losing the unique ways of life, languages, and identities of the world’s diverse peoples. It’s a matter of human rights. Each people has the right to choose its own path for development while maintaining continuity with its own past. As Indigenous Peoples put it, it’s their right to “walk to the future in the footprints of their ancestors.”
Second, the loss of cultural and linguistic diversity affects humanity at large. It’s a loss of our collective human heritage. It drastically diminishes our understanding of what it means to be human — of the thousands of different ways in which we can say, “I am human.” Our horizon as a species becomes all the narrower for that.