This has happened to some extent forever, through oral tradition, but manufactured media certainly accelerates the process. If you’re interested in this kind of

This has happened to some extent forever, through oral tradition, but manufactured media certainly accelerates the process. If you’re interested in this kind of thing i’d recommend Imagined Communities by Benedict Anderson, in which the author analyzes the way nationalism developed with the invention of the printing press. It's a classic text of anthropology and absolutely blew my mind when i read it as a teenager.