How do people, in both the past and the present, think about moments of social and political crisis, and how do they respond to them? What are the interpretive codes by which troubling events are read and given meaning, and what part do these codes play in suggesting specific strategies for coping with the world? In "Past Convictions" Courtney Booker attempts to answer these questions by examining the controversial divestiture and public penance of Charlemagne's son, the Emperor Louis the Pious, in 833.

Historians have customarily viewed the event as marking the beginning of the end of...