Perhaps the fundamental concepts of physical ontology are those of objects and events; for it is widely assumed that the world itself is amenable to being characterized successfully by means of an event ontology or an object ontology, where the outstanding difficulty is simply one of finding the right sort of fit. Although these pathways have seemed promising, they have not been without their own distinctive difficulties, for despite an area of agreement concerning suitable criteria for the individuation of objects, substantial disagreement abounds regarding appropriate standards for the differentiation of events.1 This matter is consequential for both perspectives, moreover, since whether objects are to be constructed from events or events from objects, neither view presumes either category alone provides a sufficient foundation for an adequate ontology.2 The problems which they share have resisted successful explication, nevertheless.