More than seventy documents, ranging in date from the early eleventh century to the early fourteenth century and representing both orthodox and heretical viewpoints are included.

Throughout the Middle Ages and early modern Europe theological uniformity was synonymous with social cohesion in societies that regarded themselves as bound together at their most fundamental levels by a religion. To maintain a belief in opposition to the orthodoxy was to set oneself in opposition not merely to church and state but to a whole culture in all of its manifestations. From the eleventh century to the fifteenth, however, dissenting movements appeared with greater frequency, attracted more followers, acquired philosophical as well as theological dimensions, and occupied more and more the time and the minds of religious and civil authorities. In the perception of dissent and in the steps taken to deal with it lies the history of medieval heresy and the force it exerted on religious, social, and political communities long after the Middle Ages. In this volume, Edward Peters makes available the most compact and wide-ranging collection of source materials in translation on medieval orthodoxy and heterodoxy in social context.

The struggle over fundamental issues erupted with great fury in the eleventh and twelfth centuries. In this book preeminent medievalist Heinrich Fichtenau turns his attention to a new attitude that emerged in Western Europe around the year 1000. This new attitude was exhibited both in the rise of heresy in the general population and in the self-confident rationality of the nascent schools. With his characteristic learning and insight, Fichtenau shows how these two separate intellectual phenomena contributed to a medieval world that was never quite as uniform as might appear from our modern perspective.

The Cathars are one of the most famous heretical movements of the late twelfth and early thirteenth centuries. They infiltrated the highest ranks of society and posed a major threat not only to the Catholic Church but also to secular authorities as well. The movement was finally smashed by the crusade and the inquisitional proceedings that followed. This new study is the first comprehensive history of the Cathars. It addresses major topics in medieval history including heresy, orthodoxy and the Crusades as well as providing a history of the social and political history of Languedoc and the rise of the Capetian dynasty. A fascinating study of the development of radical religious belief and its violent suppression.

Fresh investigations into heresy after 1300, demonstrating its continuing importance and influence.