The Compatibility of Evolution and Thomistic Metaphysics: A Reply to Dennis F. Polis

In this article the author discusses Dennis F. Polis’ defense of the compatibility of biological evolution and Thomistic metaphysics. Some of Polis’ methodological and metaphysical arguments are examined and it is explained why they are unfaithful to the Thomistic tradition of metaphysics. There is a discussion of why metaphysics can, within certain parameters, critique the science of evolutionary biology, as well as a discussion of the role of metaphysics in the hierarchy of the sciences. The relationship between biological species to the notion of species in philosophy, including related metaphysical topics, such as essences and Divine ideas in God, is discussed. It is determined that Polis’ view suffers from a kind of relativism and nominalism that is incompatible with the moderate realism of Aquinas. Some of Aquinas’ key existential insights in metaphysics are discussed in this context as well. In addition to being corrective, this essay helps point the way to a better defense of the compatibility of biological evolution and Thomistic metaphysics.