Austrian philosopher, Waldorf school teacher, Grail researcher, and one of the pioneers of anthroposophy.
Stein became a personal student of Rudolf Steiner from about the age of 21, and enjoyed the unofficial supervision of Steiner while writing his dissertation. Broadly speaking, the dissertation was an attempt to write a theory of cognition for spiritual knowledge.
After the war Stein assisted Steiner in promoting Social Threefolding. When it became apparent in 1919 that these efforts were not going to succeed, Steiner asked Stein to teach history and German literature at the first Waldorf School in Stuttgart. It was as part of this work that Stein began his research on the Grail, which culminated in 1928 with his book The Ninth Century and the Holy Grail.
Stein moved to London in 1933. During and after the Second World War he made many connections in government circles in Britain, as well as with the Dutch and Belgian royal families.
Stein lectured extensively on anthroposophy and related themes from around the early 1920s onward, giving up to 300 lectures a year. He also contributed many articles to The Present Age and similar periodicals, and wrote a number of short books including The Principle of Reincarnation, Gold: in History and in Modern Times, West-East: A Study in National Relationships, Labour: in History and in Modern Times, and The British: Their Psychology and Destiny.
He died on 7 July 1957 in London.
Link to Wikipedia biography