Book excerpt: Belief in the possibility of truth demonstrates a belief in God. Professor Markham places this striking argument, which lies at the very heart of Augustinian theology, within the modern debate about truth and defends its underlying claim. Belief in God is, he claims, an all-embracing world view about the nature of reality of which the possibility of truth is a part. Drawing on the work of St Augustine and St Anselm, Richard Rorty, Don Cupitt, and in particular Alasdair MacIntyre, Markham demonstrates that the necessary assumptions underpinning the realist account of truth must entail the existence of God. Referring to Nietzsche, and again to St Augustine, Markham concludes with the stark choice: either God and truth, or no God and no truth.