This book, one of the first full-length studies of the modalities to emerge from the debate to which Saul Kripke, David Lewis, Ruth Marcus, and others are contributing, is an exploration and defense of the notion of modality de re, the idea that objects have both essential and accidental properties. Plantinga develops his argument by means of the notion of possible worlds and ranges over such key problems as the nature of essence, transworld identity, negative existential propositions, and the existence (...) of unactual objects in other possible worlds. He also applies his logical theories to the elucidation of two problems in the philosophy of religion: the problem of evil and the ontological argument. (shrink)

The late John L. Mackie, formerly of University College, Oxford.

Can belief in God be rationally justified? Reviewing in detail traditional and modern arguments for and against the existence of God, Professor Plantinga concludes that they must all be judged unsuccessful. He then turns to the related philosophical problem of the existence of other minds, and defends the so-called analogical argument against current criticisms. He goes on to show, however, that although this argument affords us the best reasons we have for belief in other minds, it finally succumbs to the (...) same malady that afflicts the teleological argument of God. (shrink)

In this paper I outline and discuss the central claims and arguments of J. L. Mackie’s The Miracle of Theism. Mackie argues, in essence, that none of the traditional theistic arguments is successful taken either one at a time or in tandem, that the theist does nothave a satisfactory response to the problem of evil, and that on balance the theistic hypothesis is much less probable than is its denial. He then concludes that theism is unsatisfactory and rationally unacceptable. I (...) argue that he is mistaken in nearly all of his major contentions. (shrink)

Charles sayward has taken alvin plantinga to task for what he sees to be an invalid modal ontological argument in chapter 10 of "the nature of necessity". I begin by examining sayward's complaint and demonstrating that plantinga has anticipated and blocked it in his argument for what he later calls "serious actualism"--The thesis that no objects bear properties in worlds in which they do not exist. I then show how plantinga could block sayward even without this thesis. Finally, I examine (...) plantinga's argument anew and find it either equivocal or reliant on a dubious premise. (shrink)