Frequently I hear that Black Sabbath were the first band to use dark 'occult' themes in their music, and that all the other bands pre-Black Sabbath only ever sang about love and all the other positive aspects of life. Is this true? Considering the increasing popularity of music post-WWII one would think that there would have been musical dissents who did not want to write lyrics around the normal themes. I'm thinking that Black Sabbath was the only band to really achieve a commercial status and bring dark music into the mainstream, while there was a relatively small underground scene using occult subjects in their music, just not receiving any attention due to their lack of musical skill or inaccessibility to a mainstream audience.