Thomist Libertarianism is Committed to Mysterianism

Abstract In recent years, a large amount of scholarship has been written about St Thomas Aquinas’s views on free will and determinism. This paper is an attempt to bring some Thomist views of libertarian free will into dialogue with analytic philosopher Peter van Inwagen and his ‘mysterianism’ about free will. The thesis of this paper is that Thomist libertarians about free will are committed to Peter van Inwagen’s mysterianism about free will. The paper intends to accomplish this aim by showing how recent accounts of Thomist libertarianism cannot defeat the intuitive strength of van Inwagen’s ‘Replay argument’. The significance of this conclusion is that some Thomists are committed to mysterianism and that mysterianism is a legitimate position a Thomist can hold. This also provides evidence that the Thomist tradition can grow and be nourished by engagement with contemporary analytic philosophy.