This book is a defense of modal realism; the thesis that our world is but one of a plurality of worlds, and that the individuals that inhabit our world are only a few out of all the inhabitants of all the worlds. Lewis argues that the philosophical utility of modal realism is a good reason for believing that it is true.

This book discusses and exemplifies the philosophy of religion, or philosophical reflection on central themes of religion.

The book falls into four segments. In the first (Chapter 1), the particular conception of deity that has been predominant in western civilization—the theistic idea of God—is explicated and distinguished from several other notions of the divine. The second segment considers the major reasons that have been advanced in support of the belief that the theistic God exists. In chapters 2 through 4 the three major arguments for the existence of God are discussed, arguments which appeal to facts supposedly available (...) to any rational person, whether religious or not. Chapter 5 considers religious and mystical experience as a source and justification for theistic belief. And in Chapter 6 we examine the role that faith may play in the formation and justification of religious belief. We also consider the important issue of whether belief in God may be entirely rational quite apart from any evidence in its behalf. The third segment undertakes an examination of the problem of evil, which some have thought to provide rational grounds for atheism, the belief that the theistic God does not exist. A number of topics quite central to theistic religion are considered in the fourth segment of the book, chapters 8 through 11. These topics include miracles, the question of life after death, problems in relating the idea of divine foreknowledge to the belief in human freedom, and problems arising from the existence of diverse religions. (shrink)

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)

God is traditionally taken to be a perfect being, and the creator and sustainer of all that is. So, if theism is true, what sort of world should we expect? To answer this question, we need an account of the array of possible worlds from which God is said to choose. It seems that either there is (a) exactly one best possible world; or (b) more than one unsurpassable world; or (c) an infinite hierarchy of increasingly better worlds. Influential arguments (...) for atheism have been advanced on each hierarchy, and these jointly comprise a daunting trilemma for theism. In this paper, I argue that if theism is true, we should expect the actual world to be a multiverse comprised of all and only those universes which are worthy of creation and sustenance. I further argue that this multiverse is the unique best of all possible worlds. Finally, I explain how his unconventional view bears on the trilemma for theism. (shrink)

The Evidential Problem of Evil The evidential problem of evil is the problem of determining whether and, if so, to what extent the existence of evil (or certain instances, kinds, quantities, or distributions of evil) constitutes evidence against the existence of God, that is to say, a being perfect in power, knowledge and goodness. Evidential […].

The physicalist thesis that all entities are nothing over and above physical entities is often interpreted as appealing to a supervenience-based account of "nothing over and aboveness”, where, schematically, the A-entities are nothing over and above the B-entities if the A-entities supervene on the B-entities. The main approaches to filling in this schema correspond to different ways of characterizing the modal strength, the supervenience base, or the supervenience connection at issue. I consider each approach in turn, and argue that the (...) resulting formulation of physicalism is compatible with physicalism’s best traditional rival: a naturalist emergentism. Others have argued that supervenience-based formulations of physicalism fail. My aim here, besides addressing the full spectrum of supervenience-based approaches, is to show how certain philosophical and scientific theses concerning naturalism, properties, and laws give us new reasons to think that supervenience-based formulations of physicalism are untenable. (shrink)

Chapter 1 addresses some preliminary issues that it is important to think about in formulating arguments from evil. Chapter 2 is then concerned with the question of how an incompatibility argument from evil is best formulated, and with possible responses to such arguments. Chapter 3 then focuses on skeptical theism, and on the work that skeptical theists need to do if they are to defend their claim of having defeated incompatibility versions of the argument from evil. Finally, Chapter 4 discusses (...) evidential arguments from evil, and four different kinds of evidential argument are set out and critically examined. (shrink)

The Many-Worlds Interpretation (MWI) is an approach to quantum mechanics according to which, in addition to the world we are aware of directly, there are many other similar worlds which exist in parallel at the same space and time. The existence of the other worlds makes it possible to remove randomness and action at a distance from quantum theory and thus from all physics.

Theism can be defended against the Philosophical Problem of Evil, provided one rejects the Principle of Perfectionism, without relying on the Greater Good Defence or, unless one is a libertarian, the Free-Will Defence.A corollary of the All Good Possible Worlds Defence and the No Best Possible World Defence, is that God’s goodness need not determine God’s choice to create. The reasons, if any, which God has are relevant to the Theological Problem of Evil but not to the Philosophical Problem of (...) Evil. (shrink)

This book explores recently opened avenues in logic and philosophical analysis to offer new perspectives on time-honored religious beliefs. Topics covered include the nature of divine attributes, the implications of divine benevolence and divine justice, arguments in support of theism and atheism, and religion and morality.