I agree that Moreno started working with psychodrama as a therapy probably around 1910. Considering he was born in 1889, and he would have been 21 by 1910, I think that is a safe assumption. He was using it as therapy by 1912. The Hermetic Order of the Golden Dawn, which was founded in 1888, used psychodrama in their rituals, although it probably was not called that. Freemasonry uses it as well, and those ritual predate the G.D. by at least 200 years. The techniques are, however, a very important part of initiation rituals. Although the use of acting and story telling as clinical therapy was not used until Moreno, the use of it for teaching and initiation is clearly much older.