World Music
The term "World Music" has been credited to ethnomusicologist Robert E. Brown who coined it in the 1960s. The term became current in the 1980s as a marketing/classificatory device in the media and the music industry, and it is generally used in a discriminatory and problematic fashion to classify any kind of non-Western music, even including some Western styles such as Celtic Folk music. A basic actual definition of world music consists of "all the music in the world", which effectively renders the term virtually meaningless beyond marketing purposes.
Genres
