Eminent French social historian Georges Duby idenitifies the twelfth century as a cruical turning point in the development of the institution of marriage in Western civilization. His study of medieval marriage is a worthy successor to the exploration of social attitudes begun by Philippe Aries and continued by Fernand Braudel. During the twelfth century, Dury explains, the ideals and needs of the aristocracy clashed with those of the Church. The nobility...