Spiritual authority and temporal power - rene guenon

Deals with the normal relationship between the spiritual and the temporal powers implied in a healthy traditional civilization, that is, the supremacy of knowledge over action, of the sacerdotal over the royal caste.

Touching first on India and the medieval West, Guenon then illustrates his point by citing quarrels over investiture and disputes of certain French kingswith the papacy as evidence of a deviation in Christianity.