Along the way he discusses a wide range of topics of interest to philosophers and theologians, such as: the concept of God; what might be meant by describing a philosophical argument as a failure; the distinction between versions of the argument from evil that depend on the vast amount of evil in the world and versions of the argument that depend on a particular evil, such as the Lisbon earthquake or the death of a fawn in a forest fire; the free-will defense; animal suffering; and the problem of the hiddenness of God.