James Sterba is Professor of Philosophy at the University of Notre Dame, USA. His book, Is a Good God Logically Possible? deals with the Argument from Evil and whether a God who is all good and all powerful is logically compatible in a world where moral and natural evil exists. Sterba sits down with Underdown to discuss the arguments for and against the existence of God, how Sterba's history as a member of a religious order and later Professor of Philosophy led him to write his book, and the finer points of the argument.