Teheuti
It seems to me that this is already subsumed under the word "theories" in the following.
"'Historical Research': Research, studies and theories on the origins and development of Tarot and playing cards."
We could take the word 'theories' out since historians understand the word differently than does the general public. Also, the existing section is not really the place for a more free-wheeling discussion of the history of ideas and philosophies, much less pet theories about the Tarot being a remnant of stone-age culture.
Is the Tarot part of an underground stream in which it was known to Jacob Boehme, Raymond Llull, Paracelsus, Swedenborg, etc.? Perhaps something will come to light.