Abstract
Models of culture and representations of changes in culture as changes between such models can be validated without making unreasonable departures from the validating conditions for basic narratives. Von Wright's logic of norms provides a useful analysis of the concept of rule and hence a basis for constructing models of cultures as systems of rules. As illustrations from historical work on the eighteenth-century origins of the British permanent civil service and on administrative developments in Tudor England show, the logic of norms brings to light the logical issues that are of critical importance to changes in culture. These issues, like the models on which they depend, involve human expectations through involving human conventions; but one must also acknowledge parallel systems of description which can figure in covering-law explanations