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It is often thought that, although Spinoza develops a bold and distinctive conception of God (the unique substance, or Natura Naturans, in which all else inheres and which possesses infinitely many attributes, including extension), the arguments that he offers which purport to prove God’s existence contribute nothing new to natural theology. Rather, he is seen as just another participant in the seventeenthcentury revival of the ontological argument initiated by Descartes and taken up by Malebranche and Leibniz among others. That this is the case is both puzzling and unfortunate. It is puzzling because although Spinoza does offer an ontological proof for the existence of God, he also offers three other non-ontological proofs. It is unfortunate because these other non-ontological proofs are both more convincing and more interesting than his ontological proof. In this paper, I offer reconstructions and assessments of all of Spinoza’s arguments and argue that Spinoza’s metaphysical rationalism and his commitment to something like a Principle of Sufficient Reason are the driving force behind Spinoza’s non-ontological arguments.

There is now a considerable secondary literature on Godel's ontological arguments; in particular, interested readers should consult Sobel (1987), Anderson (1990) and Adams (1995). In this note, I wish to draw attention to an objection to these arguments which has hitherto gone unnoticed. This objection does not depend upon fine details of the formulation of the arguments; I arbitrarily choose to develop the objection in connection with the formulation provided by Anderson.

There is now a considerable secondary literature on Godel's ontological arguments; in particular, interested readers should consult Sobel (1987), Anderson (1990) and Adams (1995). In this note, I wish to draw attention to an objection to these arguments which has hitherto gone unnoticed. This objection does not depend upon fine details of the formulation of the arguments; I arbitrarily choose to develop the objection in connection with the formulation provided by Anderson.

This volume collects nine essays published by Peter van Inwagen between 1977 and 1995. Part I features, among other things, modal skepticism with respect to ontological arguments and arguments from evil. Part II addresses certain tensions Christians may feel between modern biology, critical studies of the New Testament, and the comparative study of religions, on the one hand, and Christian orthodoxy, on the other. Part III deploys a formal logic of relative identity to model the internal consistency of the orthodox doctrines of the Trinity and the Incarnation. In what follows, we summarize and reflect on five essays.

Proof and perception : the context of the argumentum cartesianum -- Refutations of atheism : ontological arguments in English philosophy, 1652-1705 -- Being and intuition : Malebranche's appropriation of the argument -- An adequate conception : the argument in Spinoza's philosophy -- Ontological arguments in Leibniz and the German enlightenment -- Kant's systematic critique of the ontological argument -- Hegel's reconstruction of the argument.

This paper discusses recent work on higher-order ontological arguments, including work on arguments due to Gödel, Maydole and Pruss. After setting out a range of these arguments, the paper seeks to highlight the principal difficulties that these kinds of arguments confront. One important aim of the paper is to cast light on Gödel's ontological argument by way of an examination of a range of related higher-order arguments.

Robert Maydole has recently presented a sophisticated ontological argument that he calls the Modal Perfection Argument for the existence of a supreme being. While this ontological argument is probably better than most of its peers, it is nonetheless open to at least one decisive objection. The purpose of this brief comment is to develop that objection. I claim that this objection indicates an important further point about the concept of entailment and its role in ontological arguments at large, the recognition of which helps to refute other conceivable ontological arguments.

Although ontological arguments had provoked many objections, most of them boil down to the claim that a purely conceptual analysis must be devoid of factual content. Thus, instead of rebutting each of these objections separately, this paper intends to convince those who deny ontological arguments to admit the existence, from their own perspectives, of at least negative ontological arguments. The paper argues that conceptual contradictions constitute arguments of this type, showing what necessarily does not exist.

This paper presents a novel objection to ontological arguments. This objection aims at showing that ontological arguments in general, given the intrinsic nature of their conclusion, are of an impossible nature. The argument rests on the fact that conclusive ontological arguments would contradict the very nature of God.