Manly P. Hall

Manly Palmer Hall (March 18, 1901 – August 29, 1990) was a Canadian-born author and mystic. He is best known for his 1928 work The Secret Teachings of All Ages. In 1934, Hall founded the Philosophical Research Society (PRS) in Los Angeles, California, a 501(c)3 nonprofit organization dedicated to the study of religion, mythology, metaphysics, and the occult. wiki