The historian who is engaged in the study of Byzantine social history is faced with a problem common to pre-industrial societies, or societies in which the majority of the population is both exploited and illiterate. The sources, written as they are by an upper class and largely for an upper class, give relatively abundant information about a small segment of the population, leaving us in darkness about the rest of society. In Byzantine history this is particularly true about the peasantry, which has left us only a very few sources of its own, and rather uninspiring ones at that. The Byzantine upper class wrote its own history, but the Byzantine peasants did not, thus making the task of the modern historian more difficult. Despite these problems, work has been done on both the urban and the rural population of the Empire, and more will probably be done as monastic archives become available. The study of the Byzantine peasantry is of primary importance. For if we are to understand Byzantine society, we must study and understand what happened in the countryside. After all, the Byzantine economy rested on agriculture, and the social relations which determined the fate of the state were, primarily, the social relations prevalent in the countryside.