This (posthumous) volume contains a comprehensive review of the principal arguments for and against the existence of God. It ranges from the classical philosophical positions of Descartes, Anselm, Berkeley, Hume et al., through the moral arguments of Newman, Kant and Sidgwick, to the recent restatements of the classical theses by Plantinga and Swinburne. It also addresses those positions that push the concept of God beyond the realm of the rational, such as those of Kierkegaard, Kung and Philips, as well as "replacements for God" such as Lelie's axiarchism.