Grunge could never have originated in Hawaii, or Rio for that matter. There’s just too much sun and vitamin D making people happy. Likewise, samba or slack-key couldn’t have started in London or Seattle, where rock, punk and trance have found deep followings.
When sun-kissed people are sad or angry, it often comes out sounding at worst melancholy, at best still happy. After all, when you’re surrounded by gorgeous beaches, blessed with abundant rain and blue skies it’s hard to hate life enough to scream into a microphone all night.