Thomas Aquinas on Divine Simplicity and Richard Dawkins’ Ultimate Boeing 747 Gambit

I have been discussing the theology of Thomas Aquinas in recent posts on this blog, including an extensive rebuttal to Aquinas’ Five Ways of proving God’s existence in this previous essay. The Five Ways belong to question 2 of the first part of Summa Theologica, and in this post I am going to discuss the content under question 3. In question 3, Aquinas writes about the theological attribute of divine simplicity. The discussion there is relevant to an argument that atheist Richard Dawkins made about a decade ago in The God Delusion, termed the Ultimate Boeing 747 gambit.

Boeing 747

Dawkins’ argument is a play on the notion of a “tornado sweeping through a junkyard to assemble a Boeing 747,” which is used by creationists to mischaracterize the probability of abiogenesis and evolution. Allegedly, the odds of complex life emerging by chance should be as rare as a tornado passing through a junkyard and assembling a Boeing 747. Dawkins’ response, however, is to turn this argument on its head. If life is too complex to have emerged by chance, then what are the odds that a complex deity, with all of the intelligence needed to design life, would just happen to exist by chance as the uncaused creator of the universe, in order to create life? Dawkins argues that the unexplained complexity of this designer poses a greater question than the problem that it seeks to solve. Rather, God is the Ultimate Boeing 747, in that the odds of such a being just happening to exist is much improbable than the more simple explanations of abiogenesis and evolution.

This argument did not jive well with many theologians, however, and both Alvin Plantinga (response here) and William Lane Craig (response here) wrote a rebuttal to it. In their responses both Plantinga and Craig appeal to Aquinas’ conception of divine simplicity to argue that Dawkins does not have a correct understanding of theology. Below is my response to their counter-arguments, and why I do not think that they have correctly characterized the complexity described by the Ultimate Boeing 747 gambit.

Continue reading