Saint Augustine stated that social division was a result of the Fall of Man. The three leading divisions were considered to be the priesthood (clergy), the nobility, and the common people. That would sometimes be expressed as "those who prayed", "those who fought" and "those who worked". The Latin terms for the three classes ("oratores", "bellatores" and "laboratores") are often found even in modern textbooks, and have been used in sources since the 9th century.