 One important point to emphasize about Wolff’s exposition of ontology is that existence (or the actual reality of being) is regarded exclusively as a determination or “complement” of a possible thing (Ont. §174). Although existing things are included in his overall description of reality, they are not as a class of objects his primary focus. More accurately, existing objects figure into Wolff’s metaphysical account only insofar as existing objects are a subset of possible things.