Plantinga and Aquinas on the Viability of the ‘Third Way’

Abstract

This article deals with Alvin Plantinga’s arguments against St. Thomas Aquinas’s third way to show that God exists. Although attacks on this argument have come from Christians and non-Christians, my contention is that these rebuttals of the third way arise because of a misunderstanding of the argument itself. Thus, the metaphysical background for understanding the third way is first explained, and then the arguments Plantinga raises against it are dealt with. After reading this article it should be clear that the third way to show God’s existence is plausible and that Plantinga’s attacks against it are based on a straw man rather than the substantive argument the third way actually is.