Hate to break it to people but the leftists migrated to media in the 50’s and into academia and by the end of the 60’s they were in charge of soft sciences already. Spent thirty-seven years in universities and by the mid 70’s it was becoming difficult for a non-left student to get their doctorate except in a few hard sciences. Most senior administrators did not come from hard sciences. Hollywood was leftist dominated by the mid 60’s as well.
What does that have to do with Janis and her singing and interpretations?
She seems to have been all about music and singing; as far as I can tell, she never completed any college or university degree (which was true of many of us who were primarily interested in new pathways in music, in those days.)
http://en.wikipedia.org/wiki/Janis_Joplin#Early_life