Robert C. Koons is a professor of philosophy at the university of texas at Austin, where he has taught for 33 years. with degrees from Oxford and U.C.L.A., his most recent interest is in the Aristotelian interpretation of quantum theory, defending and articulating Thomism in contemporary terms, and arguments for classical theism. His publications include Realism Regained (Oxford University Press, 2000), and The Atlas of Reality: A Comprehensive Guide to Metaphysics, with Timothy H. Pickavance. (Wiley-Blackwell, 2017).