Fine-Tuning, Atheist Criticism, and the Fifth Way

Abstract

Like the “modern watchmaker” argument formulated by William Paley, the argument from fine-tuning should not be confused with Thomas Aquinas' fifth proof for the existence of God as expressed in the Summa Theologiae. While the former is based on efficient causality, the latter is based upon final causality. Though some atheist criticisms are relevant to the fine-tuning argument, they do not affect the Fifth Way. After briefly expositing the fine-tuning argument, I will argue that Aquinas' argument from the “governance of the world” offers a more convincing proof for God—one that evades atheistic criticisms leveled against design arguments.