Frithjof Schuon
He was formally initiated into a Sufi order in Algeria in 1932 and later founded his own religious community in the United States. Charges brought against him in Indiana in 1991 over the group's private ceremonies were investigated and dismissed.
Schuon, The Transcendent Unity of Religions (1948); Mark Sedgwick, Against the Modern World (2004)
Swiss philosopher (1907–1998) who argued the world's religions converge at an inner, esoteric level while diverging outwardly in doctrine and rite.