Complex sentence: Schuon was recognized during his lifetime as a world authority on philosophy, spirituality and religion, and was an exponent of the "Religio Perennis", inspired by Advaita Vedanta and one of the chief representatives of the Perennialist School.
Split into simpler sentences: Schuon was recognized during his lifetime as a world authority on philosophy, spirituality and religion. He was an exponent of the "religio perennis" inspired by Advaita Vedanta and one of the chief representatives of the Perennialist School.