This contribution was conceived as an exploration of some of the ways in which the evident power of the medieval ceti dirigenti was created and maintained, as a good opportunity to do some hard thinking about what seemed and still seems to me to be one of the most important issues facing medievalists. The return on investment has turned out lower than expected, and I am now certain that better scholars have been here and returned, if not empty-handed, then at any rate not bearing the armfuls they had initially hoped for. Although the source and nature of political, social and cultural power is a subject which historians in general and medievalists in particular have instinctively tended to shy away from, there is an extensive and highly sophisticated literature on the subject in the related disciplines of sociology and political science. I shall draw, tentatively, on some of this, without claiming anything like expert or comprehensive knowledge of the literature. The topic requires not an article but a large book; what is offered here is a series of possible entry points to the understanding of a complex of problems, and such answers as may appear are in the main highly provisional.

One reason for the difficulties lies, as it so often does, in the development of historiographical tradition. We are all familiar with the medievalists' division of labour in this area, though we may not have articulated that familiarity to ourselves.