Ontology is a description of the most general structure of what there is. It is a description of a structure so general that every other discipline will deal with some detail of the structure.
Wolterstorff is the Noah Porter Professor Emeritus of Philosophical Theology, and Fellow of Berkeley College at Yale University. A prolific writer with wide-ranging philosophical and theological interests, he has written books on metaphysics, aesthetics, political philosophy, epistemology and theology and philosophy of religion.