It is difficult to write history for any culture without a written language, but it can be approximated as the current "best guess" which can be improved over time. It is a great leap forward to begin this process, especially with autonyms. Future versions of this map might be color-coded to show tribal geography by century, as known from artifacts, oral histories, fossil remains, and general archeology. Rather than a monograph of anthropological scholarship, this strikes me more as a statement of cultural pride. It says to me that, even though history is written by the victors, there are other perspectives worth sharing.