Dear Jaguar,
Historically, there have always been "ideas" that came into vogue & become hot fads only to fade away. I find it interesting when I read about the thoughts or beliefs that were prevalent during the times of certain famous "intelligent" or "talented" people. It helps me to realize that what we see in our culture today truly is a reflection of our "times". Our needs & desires fuel the books, the lectures, etc. If people stop buying these books, the publishing houses will stop printing them.
peace & joy,
holobon