Why hasn't there been a movie made on the biography of Helena Blavatsky?

This is one interesting woman that has lived around 150 yrs ago.
https://en.wikipedia.org/wiki/Helena_Blavatsky
Update: She is an author of a number of books, and other people have written about her and her life, but no movies have been made totally about her life. I in my opinion think that since all that have been written about her, a movie should be made about her life and achievements.
Update 2: @KaleyK, There's already been a biography that has been written about her, she herself have written a number of books, and she's an interesting subject already, but there's no movie about her in English. All that is needed is to compile all the information there is about her and make that movie.
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