Sure, the written word helped us to think and write more alike. The the Gutenberg press, radio and moving pictures, and then the internet. Modernity is an ognoing acti of cultural genocide that swallows everybody up and blends all human culture together into an undifferentiated grey goo.
Several years ago I visited Flores Island, which is part of the Indonesian archipelago and the place where Archeologists discovered Hobbit man. The Island is only 150 km long but it's inhabitants speak 5 distinct languages and 80-something dialects.