Originally Posted by Andras
HPB and the movement of theosophy is based on very ancient Hindu/Tibetan Buddhist ideas, and while they were very popular in the 19th century, their ideas are much older than that...
I was speaking specifically of the theosophy movement, not of the underlying concepts which it eventually took into and of itself. Obviously, many of the ideas that theosophy embraces are much older. That's true of most things, though.