The value of philosophy (1)

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4.2 God's Existence

In some introductory philosophy textbooks and anthologies, the arguments for God's existence are presented as ostensible proofs which are then shown to be fallible. For example, an argument from the apparent order and purposive nature of the cosmos will be criticized on the grounds that, at best, the argument would establish there is a purposive, designing intelligence at work in the cosmos. This falls far short of establishing that there is a God who is omnipotent, omniscient, benevolent, and so on. But two comments need to be made: First, that “meager” conclusion alone would be enough to disturb a scientific naturalist who wishes to rule out all such transcendent intelligence. Second, few philosophers today advance a single argument as a proof. Customarily, a design argument might be advanced alongside an argument from religious experience, and the other arguments to be considered below. True to Hempel's advice (cited earlier) about comprehensive inquiry, it is increasingly common to see philosophies—scientific naturalism or theism—advanced with cumulative arguments, a whole range of considerations, and not with a supposed knock-down, single proof.

One reason why the case for and against major, comprehensive philosophies are mostly cumulative is because of discontent in what is often called foundationalism. In one classical form of foundationalism, one secures first and foremost a basis of beliefs which one may see to be true with certainty. The base may be cast as indubitable or infallible. One then slowly builds up the justification for one's other, more extensive beliefs about oneself and the world. Many (but not all) philosophers now see justification as more complex and interwoven; the proper object of philosophical inquiry is overall coherence, not a series of distinguishable building operations beginning with a foundation.

One way of carrying out philosophy of religion along non-foundationalist lines has been to build a case for the comparative rationality of a religious view of the world. It has been argued that the intellectual integrity of a religious world view can be secured if it can be shown to be no less rational than the available alternatives. It need only achieve intellectual parity. John Hick and others emphasize the integrity of religious ways of seeing the world that are holistic, internally coherent, and open to criticism along various external lines (see Hick 2004, 2006). On the latter front, if a religious way of conceiving the world is at complete odds with contemporary science, that would count as grounds for revising the religious outlook. The case for religion need not, however, be scientific or even analogous to science. If Hick is right, religious ways of seeing the world are not incompatible with science, but complementary. Independent of Hick but in the same spirit, Plantinga has proposed that belief in God's existence may be taken as properly basic and fully warranted without having to be justified in relation to standard arguments for God from design, miracles, and so on. Plantinga argues that the tendency to believe in God follows natural tendencies of the human mind. This stance comprises what is commonly referred to as Reformed Epistemology because of its connection to the work of the Reformed theologian John Calvin (1509–1564) who maintained that we have a sense of God (sensus divinitatis) leading us to see God in the world around us. Plantinga has thereby couched the question of justification within the larger arena of metaphysics. By advancing an intricate, comprehensive picture of how beliefs can be warranted when they function as God designed them, he has provided what some believe to be a combined metaphysical and epistemic case for the rationality of religious convictions (see Beilby (ed.) 2002).

Who has the burden of proof in a debate between a theist and an atheist? Antony Flew (1984) thinks it is the theist. By his lights, the theist and atheist can agree on a whole base line of truths (such as the findings of the physical sciences). The question then becomes, Why go any further? Flew wields a version of Ockham's razor, arguing that if one has no reason to go further, one has reason not to go further. (As it happens, Flew has subsequently claimed that there are good reasons for going beyond the natural world, and he is currently a theist; see Flew 2008.) His challenge has been met on various fronts, with some critics claiming that Flew's burden of proof argument is wedded to an outmoded foundationalism, that any burden of proof is shared equally by atheists and theists, or that the theist has an array of arguments to help shoulder a greater burden of proof. The position of fideism is a further option. Fideism is the view that religious belief does not require evidence and that religious faith is self-vindicating. Karl Barth (1886–1968) advocated a fideistic philosophy. (For a critical assessment of fideism, see Moser 2010, chapter 2.) Hick and Plantinga need not be considered fideists because of the high role each gives to experience, coherence, and reflection.

To sketch some of the main lines of argument in this literature, consider the ontological, cosmological, and teleological arguments, arguments from the problem of evil, and the argument over the cognitive status of religious experience.

4.2.1 Ontological arguments

There is a host of arguments under this title; all of them are based principally on conceptual, a priori grounds which do not involve a posteriori empirical investigation. If a version of the argument works, then it can be deployed using only the concept of God and some modal principles of inference, that is, principles concerning possibility and necessity. The argument need not resist all empirical support, however, as I shall indicate.

The focus of the argument is the thesis that, if there is a God, then God's existence is necessary. God's existence is not contingent—God is not the sort of being that just happens to exist. That this is a plausible picture of what is meant by God may be shown by appealing to the way God is conceived in Jewish, Christian, and Islamic traditions. This would involve some a posteriori, empirical research into the way God is thought of in these traditions. Alternatively, a defender of the ontological argument might hope to convince others that the concept of God is the concept of a being that exists necessarily by beginning with the idea of a maximally excellent being. If there were a maximally excellent being what would it be like? It has been argued that among its array of great-making qualities (omniscience and omnipotence) would be necessary existence. Once fully articulated, it can be argued that a maximally excellent being which existed necessarily could be called “God.”

The ontological argument goes back to St. Anselm (1033/34–1109), but I shall explore a current version relying heavily on the principle that if something is possibly necessarily the case, then it is necessarily the case (or, to put it redundantly, it is necessarily necessary). The principle can be illustrated in the case of propositions. That six is the smallest perfect number (that number which is equal to the sum of its divisors including one but not including itself) does not seem to be the sort of thing that might just happen to be true. Rather, either it is necessarily true or necessarily false. If the latter, it is not possible, if the former, it is possible. If one knows that it is possible that six is the smallest perfect number then one has good reason to believe that. Do we have reason to think it is possible that God exists necessarily? In support of this, one can also appeal to a posteriori matters, noting the extant religious traditions that uphold such a notion. The fact that the concept of God as a necessarily existing reality seems to be coherently conceived widely across time and cultures is some evidence that the concept is coherent (it is possible there is a God), for God's existence has plausibility, thus can also contribute to believing it is possible God exists. There is an old philosophical precept that from the fact that something exists, it follows that it is possible (ab esse ad posse valet consequentia). A related principle is that evidence that something exists is evidence that it is possible that such a thing exists. There does not appear to be anything amiss in their thinking of God as necessarily existing; if the belief that God exists is incoherent this is not obvious. Indeed, a number of atheists think God might exist, but conclude God does not. If we are successful in establishing the possibility that God necessarily exists, the conclusion follows that it is necessarily the case that God exists.

There have been hundreds of objections and replies to this argument. Perhaps the most ambitious objection is that the argument can be used with one minor alteration to argue that God cannot exist. Assume all the argument above is correct, but also that it is possible that God does not exist. Atheists can point out that many theists who believe there is a God at least allow for the bare possibility that they could be wrong and there is no God. If it is possible that there is no God, then it would necessarily follow that there is no God. Replies to this objection emphasize the difficulty of conceiving of the non-existence of God. The battle over whether God is necessary or impossible is often fought over the coherence of the various divine attributes discussed in section 3. If you think these attributes are compossible, involve no contradictions, and violate no known metaphysical truths, then you may well have good grounds for concluding that God is possible and therefore necessary. However, if you see a contradiction, say, in describing a being who is at once omniscient and omnipotent, you may well have good grounds for concluding that God's existence is impossible.

Another objection is that it makes no sense to think of a being existing necessarily; propositions may be necessarily true or false, but objects cannot be necessary or contingent. Some philosophers reply that it makes no less sense to think of an individual (God) existing necessarily than it does to think of propositions being necessarily true.

A further objection is that the ontological argument cannot get off the ground because of the question-begging nature of its premise that if there is a God, then God exists necessarily. Does admitting this premise concede that there is some individual thing such that if it exists, it exists necessarily? Replies have claimed that the argument only requires one to consider an ostensible state of affairs, without having to concede initially whether the state of affairs is possible or impossible. To consider what is involved in positing the existence of God is no more hazardous than considering what is involved in positing the existence of unicorns. One can entertain the existence of unicorns and their necessary features (that necessarily if there were unicorns, there would exist single-horned beasts) without believing that there are unicorns.

Finally, consider the objection that, if successful in providing reasons to believe that God exists, the ontological argument could be used to establish the existence of a whole array of other items, like perfect islands. Replies to this sort of objection have typically questioned whether it makes sense to think of an island (a physical thing) as existing necessarily or as having maximal excellence on a par with God. Does the imagined island have excellences like omniscience, omnipotence (a power which would include the power to make indefinitely many islands), and so on?

Classical, alternative versions of the ontological argument are propounded by Anselm, Spinoza, and Descartes, with current versions by Alvin Plantinga, Charles Hartshorne, Norman Malcolm, and C. Dore; classical critics include Gaunilo and Kant, and current critics are many, including William Rowe, J. Barnes, G. Oppy, and J. L. Mackie. The latest book-length treatment of the ontological argument is a vigorous defense: Rethinking the Ontological Argument by Daniel Dombrowski (2006).

4.2.2 Cosmological arguments

Arguments in this vein are more firmly planted in empirical, a posteriori reflection, but some versions employ a priori reasons as well. There are various versions. Some argue that the cosmos had an initial cause outside it, a First Cause in time. Others argue that the cosmos has a necessary, sustaining cause from instant to instant. The two versions are not mutually exclusive, for it is possible both that the cosmos had a First Cause and that it currently has a sustaining cause.

The cosmological argument relies on the intelligibility of the notion of something which is not itself caused to exist by anything else. This could be either the all-out necessity of supreme pre-eminence across all possible worlds used in versions of the ontological argument, or a more local, limited notion of a being that is uncaused in the actual world. If successful, the argument would provide reason for thinking there is at least one such being of extraordinary power responsible for the existence of the cosmos. At best, it may not justify a full picture of the God of religion (a First Cause would be powerful, but not necessarily omnipotent), but it would nonetheless challenge naturalistic alternatives and bring one closer to theism.

Both versions of the argument ask us to consider the cosmos in its present state. Is the world as we know it something that necessarily exists? At least with respect to ourselves, the planet, the solar system and the galaxy, it appears not. With respect to these items in the cosmos, it makes sense to ask why they exist rather than not. In relation to scientific accounts of the natural world, such enquiries into causes make abundant sense and are perhaps even essential presuppositions of the natural sciences. Some proponents of the argument contend that we know a priori that if something exists there is a reason for its existence. So, why does the cosmos exist? If we explain the contingent existence of the cosmos (or states of the cosmos) only in terms of other contingent things (earlier states of the cosmos, say), then a full cosmic explanation will never be attained. At this point the two versions of the argument divide.

Arguments to a First Cause in time contend that a continuous temporal regress from one contingent existence to another would never account for the existence of the cosmos, and they conclude that it is more reasonable to accept there was a First Cause than to accept either a regress or the claim that the cosmos just came into being from nothing. Arguments to a sustaining cause of the cosmos claim that explanations of why something exists now cannot be adequate without assuming a present, contemporaneous sustaining cause. The arguments have been based on the denial of all actual infinities or on the acceptance of some infinities (for instance, the coherence of supposing there to be infinitely many stars) combined with the rejection of an infinite regress of explanations solely involving contingent states of affairs. The latter has been described as a vicious regress as opposed to one that is benign. There are plausible examples of vicious infinite regresses that do not generate explanations: for instance, imagine that I explain my possession of a book by reporting that I got it from A who got it from B, and so on to infinity. This would not explain how I got the book. Alternatively, imagine a mirror with light reflected in it. Would the presence of light be successfully explained if one claimed that the light was a reflection of light from another mirror, and the light in that mirror came from yet another mirror, and so on to infinity? Consider a final case. You come across a word you do not understand; let it be “ongggt”. You ask its meaning and are given another word which is unintelligible to you, and so on, forming an infinite regress. Would you ever know the meaning of the first term? The force of these cases is to show how similar they are to the regress of contingent explanations.

Versions of the argument that reject all actual infinities face the embarrassment of explaining what is to be made of the First Cause, especially since it might have some features that are actually infinite. In reply, Craig and others have contended that they have no objection to potential infinities (although the First Cause will never cease to be, it will never become an actual infinity). They further accept that prior to the creation, the First Cause was not in time, a position relying on the theory that time is relational rather than absolute. The current scientific popularity of the relational view may offer support to defenders of the argument.

It has been objected that both versions of the cosmological argument set out an inflated picture of what explanations are reasonable. Why should the cosmos as a whole need an explanation? If everything in the cosmos can be explained, albeit through infinite, regressive accounts, what is left to explain? One may reply either by denying that infinite regresses actually do satisfactorily explain, or by charging that the failure to seek an explanation for the whole is arbitrary. The question, “Why is there a cosmos?” seems a perfectly intelligible one. If there are accounts for things in the cosmos, why not for the whole? The argument is not built on the fallacy of treating every whole as having all the properties of its parts. But if everything in the cosmos is contingent, it seems just as reasonable to believe that the whole cosmos is contingent as it is to believe that if everything in the cosmos were invisible, the cosmos as a whole would be invisible.

Another objection is that rather than explaining the contingent cosmos, the cosmological argument introduces a mysterious entity of which we can make very little philosophical or scientific sense. How can positing at least one First Cause provide a better account of the cosmos than simply concluding that the cosmos lacks an ultimate account? In the end, the theist seems bound to admit that why the First Cause created at all was a contingent matter. If, on the contrary, the theist has to claim that the First Cause had to do what it did, would not the cosmos be necessary rather than contingent?

Some theists come close to concluding that it was indeed essential that God created the cosmos. If God is supremely good, there had to be some overflowing of goodness in the form of a cosmos (see Kretzmann and Stump in Morris 1987, on the ideas of Dionysius the Areopagite; see Rowe 2004 for arguments that God is not free). But theists typically reserve some role for the freedom of God and thus seek to retain the idea that the cosmos is contingent. Defenders of the cosmological argument still contend that its account of the cosmos has a comprehensive simplicity lacking in alternative views. God's choices may be contingent, but not God's existence and the Divine choice of creating the cosmos can be understood to be profoundly simple in its supreme, overriding endeavor, namely to create something good. Swinburne has argued that accounting for natural laws in terms of God's will provides for a simple, overarching framework within which to comprehend the order and purposive character of the cosmos (see also Foster 2004). At this point we move from the cosmological to the teleological arguments.

Defenders of the cosmological argument include Swinburne, Richard Taylor, Hugo Meynell, Timothy O'Connor, Bruce Reichenbach, Robert Koons, and William Rowe; prominent opponents include Antony Flew, Michael Martin, Howard Sobel, Nicholas Everitt, and J. L Mackie.

4.2.3 Teleological arguments

These arguments focus on characteristics of the cosmos that seem to reflect the design or intentionality of God or, more modestly, of one or more powerful, intelligent God-like agents. Part of the argument may be formulated as providing evidence that the cosmos is the sort of reality that would be produced by an intelligent being, and then arguing that positing this source is more reasonable than agnosticism or denying it. As in the case of the cosmological argument, the defender of the teleological argument may want to claim only to be giving us some reason for thinking there is a God. Note the way the various arguments might then be brought to bear on each other. If successful, the teleological argument may provide some reason for thinking that the First Cause of the cosmological argument is purposive, while the ontological argument provides some reason for thinking that it makes sense to posit a being that has Divine attributes and necessarily exists. Behind all of them an argument from religious experience may provide some initial reasons to seek further support for a religious conception of the cosmos and to question the adequacy of naturalism.

One version of the teleological argument will depend on the intelligibility of purposive explanation. In our own human case it appears that intentional, purposive explanations are legitimate and can truly account for the nature and occurrence of events. In thinking about an explanation for the ultimate character of the cosmos, is it more likely for the cosmos to be accounted for in terms of a powerful, intelligent agent or in terms of a naturalistic scheme of final laws with no intelligence behind them? Theists employing the teleological argument will draw attention to the order and stability of the cosmos, the emergence of vegetative and animal life, the existence of consciousness, morality, rational agents and the like, in an effort to identify what might plausibly be seen as purposively explicable features of the cosmos. Naturalistic explanations, whether in biology or physics, are then cast as being comparatively local in application when held up against the broader schema of a theistic metaphysics. Darwinian accounts of biological evolution will not necessarily assist us in thinking through why there are either any such laws or any organisms to begin with. Arguments supporting and opposing the teleological argument will then resemble arguments about the cosmological argument, with the negative side contending that there is no need to move beyond a naturalistic account, and the positive side aiming to establish that failing to go beyond naturalism is unreasonable.

In assessing the teleological argument, we can begin with the objection from uniqueness. We cannot compare our cosmos with others to determine which have been designed and which have not. If we could, then we might be able to find support for the argument. If we could compare our cosmos with those we knew to be designed and if the comparison were closer than with those we knew not to be designed, then the argument might be plausible. Without such comparisons, however, the argument fails. Replies to this line of attack have contended that were we to insist that inferences in unique cases were out of order, then we would have to rule out otherwise perfectly respectable scientific accounts of the origin of the cosmos. Besides, while it is not possible to compare the layout of different cosmic histories, it is in principle possible to envisage worlds that seem chaotic, random, or based on laws that cripple the emergence of life. Now we can envisage an intelligent being creating such worlds, but, through considering their features, we can articulate some marks of purposive design to help us judge whether the cosmos was designed rather than created at random. Some critics appeal to the possibility that the cosmos has an infinite history to bolster and re-introduce the uniqueness objection. Given infinite time and chance, it seems likely that something like our world will come into existence, with all its appearance of design. If so, why should we take it to be so shocking that our world has its apparent design, and why should explaining the world require positing one or more intelligent designers? Replies repeat the earlier move of insisting that if the objection were to be decisive, then many seemingly respectable accounts would also have to fall by the wayside. It is often conceded that the teleological argument does not demonstrate that one or more designers are required; it seeks rather to establish that positing such purposive intelligence is reasonable and preferable to naturalism. Recent defenders of the argument this century include George Schlesinger, Robin Collins, and Richard Swinburne. It is rejected by J. L. Mackie, Michael Martin, Nicholas Everitt, and others.

One feature of the teleological argument currently receiving increased attention focuses on epistemology. It has been contended that if we do rely on our cognitive faculties, it is reasonable to believe that these are not brought about by naturalistic forces—forces that are entirely driven by chance or are the outcome of processes not formed by an overriding intelligence. An illustration may help to understand the argument. Imagine coming across what appears to be a sign reporting some information about your current altitude (some rocks in a configuration giving you your current location and precise height above sea-level in meters). If you had reason to believe that this “sign” was totally the result of chance configurations, would it still be reasonable to trust it? Some theists argue that it would not be reasonable, and that trusting our cognitive faculties requires us to accept that they were formed by an overarching, good, creative agent. This rekindles Descartes' point about relying on the goodness of God to ensure that our cognitive faculties are in good working order. Objections to this argument center on naturalistic explanations, especially those friendly to evolution. In evolutionary epistemology, one tries to account for the reliability of cognitive faculties in terms of trial and error leading to survival. A rejoinder by theists is that survival alone is not necessarily linked to true beliefs. It could, in principle, be false beliefs that enhance survival. In fact, some atheists think that believing in God has been crucial to people's survival, though the belief is radically false. Martin and Mackie, among others, object to the epistemic teleological argument; Plantinga, Richard Creel and Richard Taylor defend it.

Two recent developments in teleological argumentation have involved the intelligent design hypothesis and fine tuning arguments.

The first is an argument that there are orders of biological complexity emerging in evolution that are highly unlikely if accounted for by random mutation and natural selection or any other means in the absence of a purposive, intentional force (Behe 2007). Debate on the intelligent design (ID) proposal includes questions of whether it is properly scientific, about the biochemistry involved, and whether (if the ID hypothesis is superior to non-ID accounts) the ID hypothesis can inform us about the nature of the intelligent, designing forces. While the ID hypothesis has been defended as an allegedly scientific account—it is not based on an appeal to Genesis (as Creationism is)—many scientists argue that ID is not a scientific theory because it is neither testable nor falsifiable. Some also argue that ID goes beyond the available evidence and that it systematically underestimates the ability of non-intelligent, natural causes (plus chance) to account for the relevant biological complexity. Critics like Kenneth Miller contend that Behe does not take into sufficient account the adaptive value of very minor changes in evolution (such as the sensitivity to light found in algae and bacteria) that gradually lead to complex organs such as the eye (Miller 1999).

Fine tuning arguments contend that the existence of our cosmos with its suns, planets, life, et al. would not have come about or continued in existence without the constancy of multiple factors. Even minor changes to the nuclear weak force would not have allowed for stars, nor would stars have endured if the ratio of electromagnetism to gravity had been different. John Leslie observes: “Alterations by less than one part in a billion to the expansion speed early in the Big Bang would have led to runaway expansion, everything quickly becoming so dilute that no stars could have formed, or else to gravitational collapse inside under a second” (Leslie 2007, 76). Robin Collins and others have argued that theism better accounts for the fine tuning than naturalism (see Collins 2003; for criticism of the argument, see Craig & Smith 1993).

A more sustained objection against virtually all versions of the teleological argument takes issue with the assumption that the cosmos is good or that it is the sort of thing that would be brought about by an intelligent, completely benevolent being. This leads us directly to the next central concern of the philosophy of God.

4.2.4 Problems of evil

If there is a God who is omnipotent, omniscient, and completely good, why is there evil? The problem of evil is the most widely considered objection to theism in both western and eastern philosophy. There are two general versions of the problem: the deductive or logical version, which asserts that the existence of any evil at all (regardless of its role in producing good) is incompatible with God's existence; and the probabilistic version, which asserts that given the quantity and severity of evil that actually exists, it is unlikely that God exists. The deductive problem is currently less commonly debated because it is widely acknowledged that a thoroughly good being might allow or inflict some harm under certain morally compelling conditions (such as causing a child pain when removing a splinter). More intense debate concerns the likelihood (or even possibility) that there is a completely good God given the vast amount of evil in the cosmos. Consider human and animal suffering caused by death, predation, birth defects, ravaging diseases, virtually unchecked human wickedness, torture, rape, oppression, and “natural disasters.” Consider how often those who suffer are innocent. Why should there be so much gratuitous, apparently pointless evil?

In the face of the problem of evil, some philosophers and theologians deny that God is all-powerful and all-knowing. John Stuart Mill took this line, and panentheist theologians today also question the traditional treatments of Divine power. According to panentheism, God is immanent in the world, suffering with the oppressed and working to bring good out of evil, although in spite of God's efforts, evil will invariably mar the created order. Another response is to think of God as being very different from a moral agent. Brian Davies and others have contended that what it means for God to be good is different from what it means for an agent to be morally good (Davies 2006). A more desperate strategy is to deny the existence of evil, but it is difficult to reconcile traditional monotheism with moral skepticism. Also, insofar as we believe there to be a God worthy of worship and a fitting object of human love, the appeal to moral skepticism will carry little weight. The idea that evil is a privation or twisting of the good may have some currency in thinking through the problem of evil, but it is difficult to see how it alone could go very far to vindicate belief in God's goodness. Searing pain and endless suffering seem altogether real even if they are analyzed as being philosophically parasitic on something valuable. The three great monotheistic traditions, with their ample insistence on the reality of evil, offer little reason to try to defuse the problem of evil by this route. Indeed, classical Judaism, Christianity and Islam are so committed to the existence of evil that a reason to reject evil would be a reason to reject these religious traditions. What would be the point of the Judaic teaching about the Exodus (God liberating the people of Israel from slavery), or the Christian teaching about the incarnation (Christ revealing God as love and releasing a Divine power that will, in the end, conquer death), or the Islamic teaching of Mohammed (the holy prophet of Allah who is all-just and all-merciful) if slavery, hate, death, and injustice did not exist?

In part, the magnitude of the difficulty one takes the problem of evil to pose for theism will depend upon one's commitments in other areas of philosophy, especially ethics, epistemology, and metaphysics. If in ethics you hold that there should be no preventable suffering for any reason, regardless of the cause or consequence, then the problem of evil will conflict with your acceptance of traditional theism. Moreover, if you hold that any solution to the problem of evil should be evident to all persons, then again traditional theism is in jeopardy, for clearly the “solution” is not evident to all. Debate has largely centered on the legitimacy of adopting some middle position: a theory of values that would preserve a clear assessment of the profound evil in the cosmos as well as some understanding of how this might be compatible with the existence of an all powerful, completely good Creator. Could there be reasons why God would permit cosmic ills? If we do not know what those reasons might be, are we in a position to conclude that there are none or that there could not be any? Exploring different possibilities will be shaped by one's metaphysics. For example, if you do not believe there is free will, then you will not be moved by any appeal to the positive value of free will and its role in bringing about good as offsetting its role in bringing about evil.

Theistic responses to the problem of evil distinguish between a defense and a theodicy. A defense seeks to establish that rational belief that God exists is still possible (when the defense is employed against the logical version of the problem of evil) and that the existence of evil does not make it improbable that God exists (when used against the probabilistic version). Some have adopted the defense strategy while arguing that we are in a position to have rational belief in the existence of evil and in a completely good God who hates this evil, even though we may be unable to see how these two beliefs are compatible. A theodicy is more ambitious and is typically part of a broader project, arguing that it is reasonable to believe that God exists on the basis of the good as well as the evident evil of the cosmos. In a theodicy, the project is not to account for each and every evil, but to provide an overarching framework within which to understand at least roughly how the evil that occurs is part of some overall good—for instance, the overcoming of evil is itself a great good. In practice, a defense and a theodicy often appeal to similar factors, the first and foremost being what many call the Greater Good Defense.

4.2.5 Evil and the Greater Good

In the Greater Good Defense, it is contended that evil can be understood as either a necessary accompaniment to bringing about greater goods or an integral part of these goods. Thus, in a version often called the Free Will Defense, it is proposed that free creatures who are able to care for each other and whose welfare depends on each other's freely chosen action constitute a good. For this good to be realized, it is argued, there must be the bona fide possibility of persons harming each other. The free will defense is sometimes used narrowly only to cover evil that occurs as a result, direct or indirect, of human action. But it has been speculatively extended by those proposing a defense rather than a theodicy to cover other evils which might be brought about by supernatural agents other than God. According to the Greater Good case, evil provides an opportunity to realize great values, such as the virtues of courage and the pursuit of justice. Reichenbach (1982), Tennant (1930), Swinburne (1979), and van Inwagen (2006) have also underscored the good of a stable world of natural laws in which animals and humans learn about the cosmos and develop autonomously, independent of the certainty that God exists. Some atheists accord value to the good of living in a world without God, and these views have been used by theists to back up the claim that God might have had reason to create a cosmos in which Divine existence is not overwhelmingly obvious to us. If God's existence were overwhelmingly obvious, then motivations to virtue might be clouded by self-interest and by the bare fear of offending an omnipotent being. Further, there may even be some good to acting virtuously even if circumstances guarantee a tragic outcome. John Hick (1978) so argued and has developed what he construes to be an Irenaean approach to the problem of evil (named after St. Irenaeus of the second century). On this approach, it is deemed good that humanity develops the life of virtue gradually, evolving to a life of grace, maturity, and love. This contrasts with a theodicy associated with St. Augustine, according to which God made us perfect and then allowed us to fall into perdition, only to be redeemed later by Christ. Hick thinks the Augustinian model fails whereas the Irenaean one is credible.

Some have based an argument from the problem of evil on the charge that this is not the best possible world. If there were a supreme, maximally excellent God, surely God would bring about the best possible creation. Because this is not the best possible creation, there is no supreme, maximally excellent God. Following Adams (1987), many now reply that the whole notion of a best possible world, like the highest possible number, is incoherent. For any world that can be imagined with such and such happiness, goodness, virtue and so on, a higher one can be imagined. If the notion of a best possible world is incoherent, would this count against belief that there could be a supreme, maximally excellent being? It has been argued on the contrary that Divine excellences admit of upper limits or maxima that are not quantifiable in a serial fashion (for example, Divine omnipotence involves being able to do anything logically or metaphysically possible, but does not require actually doing the greatest number of acts or a series of acts of which there can be no more).

Those concerned with the problem of evil clash over the question of how one assesses the likelihood of Divine existence. Someone who reports seeing no point to the existence of evil or no justification for God to allow it seems to imply that if there were a point they would see it. Note the difference between seeing no point and not seeing a point. In the cosmic case, is it clear that if there were a reason justifying the existence of evil, we would see it? William Rowe thinks some plausible understanding of God's justificatory reason for allowing the evil should be detectable, but that there are cases of evil that are altogether gratuitous. Defenders like William Hasker and Stephen Wykstra reply that these cases are not decisive counter-examples to the claim that there is a good God. These philosophers hold that we can recognize evil and grasp our duty to do all in our power to prevent or alleviate it. But we should not take our failure to see what reason God might have for allowing evil to count as grounds for thinking that there is no reason. This later move has led to a position commonly calledskeptical theism. Michael Bergmann, Michael Rea, and others have argued that we have good reason to be skeptical about whether we can assess whether ostensibly gratuitous evils may or may not be permitted by an all good God (Bergmann 2001; Bergmann and Rea 2005; for criticism see Almeida and Oppy 2003).

Some portraits of an afterlife seem to have little bearing on our response to the magnitude of evil here and now. Does it help to understand why God allows evil if all victims will receive happiness later? But it is difficult to treat the possibility of an afterlife as entirely irrelevant. Is death the annihilation of persons or an event involving a transfiguration to a higher state? If you do not think that it matters whether persons continue to exist after death, then such speculation is of little consequence. But suppose that the afterlife is understood as being morally intertwined with this life, with opportunity for moral and spiritual reformation, transfiguration of the wicked, rejuvenation and occasions for new life, perhaps even reconciliation and communion between oppressors seeking forgiveness and their victims. Then these considerations might help to defend against arguments based on the existence of evil. Insofar as one cannot rule out the possibility of an afterlife morally tied to our life, one cannot rule out the possibility that God brings some good out of cosmic ills.

The most recent work on the afterlife in philosophy of religion has focused on the compatibility of an individual afterlife with some forms of physicalism. Arguably, a dualist treatment of human persons is more promising. If you are not metaphysically identical with your body, then perhaps the annihilation of your body is not the annihilation of you. Today, a range of philosophers have argued that even if physicalism is true, an afterlife is still possible (Peter van Inwagen, Lynne Baker, Trenton Merricks, Kevin Cocoran). The import of this work for the problem of evil is that the possible redemptive value of an afterlife should not be ruled out (without argument) if one assumes physicalism to be true. (For an extraordinary, rich resource on the relevant literature, see The Oxford Handbook of Eschatology, ed. by J. Walls.)

4.2.6 Religious Experience

Perhaps the justification most widely offered for religious belief concerns the occurrence of religious experience or the cumulative weight of testimony of those claiming to have had religious experiences. Putting the latter case in theistic terms, the argument appeals to the fact that many people have testified that they have felt God's presence. Does such testimony provide evidence that God exists? That it is evidence has been argued by Jerome Gellman, Keith Yandell, William Alston, Caroline Davis, Gary Gutting, Kai-Man Kwan, Richard Swinburne and others. That it is not (or that its evidential force is trivial) is argued by Michael Martin, J. L. Mackie, Kai Nielson, Matthew Bagger, John Schellenberg, William Rowe, and others. In an effort to stimulate further investigation, I shall briefly sketch some of the moves and countermoves in the debate.

Objection: Religious experience cannot be experience of God for experience is only sensory and if God is non-physical, God cannot be sensed.

Reply: The thesis that experience is only sensory can be challenged. Yandell marks out some experiences (as when one has “a feeling” someone is present but without having any accompanying sensations) that might provide grounds for questioning a narrow sensory notion of experience.

Objection: Testimony to have experienced God is only testimony that one thinks one has experienced God; it is only testimony of a conviction, not evidence.

Reply: The literature on religious experience testifies to the existence of experience of some Divine being on the basis of which the subject comes to think the experience is of God. If read charitably, the testimony is not testimony to a conviction, but to experiences that form the grounds for the conviction. (See Bagger 1999 for a vigorous articulation of this objection, and note the reply by Kai-man Kwam 2003).

Objection: Because religious experience is unique, how could one ever determine whether it is reliable? We simply lack the ability to examine the object of religious experience in order to test whether the reported experiences are indeed reliable.

Reply: As we learned from Descartes, all our experiences of external objects face a problem of uniqueness. It is possible in principle that all our senses are mistaken and we do not have the public, embodied life we think we lead. We cannot step out of our own subjectivity to vindicate our ordinary perceptual beliefs any more than in the religious case. (See the debate between William Alston and Evan Fales 2004).

Objection: Reports of religious experience differ radically and the testimony of one religious party neutralizes the testimony of others. The testimony of Hindus cancels out the testimony of Christians. The testimony of atheists to experience God's absence cancels out the testimony of “believers.”

Reply: Several replies might be offered here. Testimony to experience the absence of God might be better understood as testimony not to experience God. Failing to experience God might be justification for believing that there is no God only to the extent that we have reason to believe that if God exists God would be experienced by all. Theists might even appeal to the claim by many atheists that it can be virtuous to live ethically with atheist beliefs. Perhaps if there is a God, God does not think this is altogether bad, and actually desires religious belief to be fashioned under conditions of trust and faith rather than knowledge. The diversity of religious experiences has caused some defenders of the argument from religious experience to mute their conclusion. Thus, Gutting (1982) contends that the argument is not strong enough to fully vindicate a specific religious tradition, but that it is strong enough to overturn an anti-religious naturalism. Other defenders use their specific tradition to deal with ostensibly competing claims based on different sorts of religious experiences. Theists have proposed that more impersonal experiences of the Divine represent only one aspect of God. God is a person or is person-like, but God can also be experienced, for example, as sheer luminous unity. Hindus have claimed the experience of God as personal is only one stage in the overall journey of the soul to truth, the highest truth being that Brahman transcends personhood. (For a discussion of these objections and replies and references, see Taliaferro 1998.)

How one settles the argument will depend on one's overall convictions in many areas of philosophy. The holistic, interwoven nature of both theistic and atheistic arguments can be readily illustrated. If you diminish the implications of religious experience and have a high standard regarding the burden of proof for any sort of religious outlook, then it is highly likely that the classical arguments for God's existence will not be persuasive. Moreover, if one thinks that theism can be shown to be intellectually confused from the start, then theistic arguments from religious experience will carry little weight. Testimony to have experienced God will have no more weight than testimony to have experienced a round square, and non-religious explanations of religious experience—like those of Freud (a result of wish-fulfillment), Marx (a reflection of the economic base) or Durkheim (a product of social forces)—will increase their appeal. If, on the other hand, you think the theistic picture is coherent and that the testimony of religious experience provides some evidence for theism, then your assessment of the classical theistic arguments might be more favorable, for they would serve to corroborate and further support what you already have some reason to believe. From such a vantage point, appeal to wish-fulfillment, economics, and social forces might have a role, but the role is to explain why some parties do not have experiences of God and to counter the charge that failure to have such experiences provides evidence that there is no religious reality. For an excellent collection of recent work on explaining the emergence and continuation of religious experience, see Schloss and Murray (eds.) 2009.

There is not space to cover the many other arguments for and against the existence of God, but several additional arguments are briefly noted. The argument from miracles starts from specific extraordinary events, arguing that they provide reasons for believing there to be a supernatural agent or, more modestly, reasons for skepticism about the sufficiency of a naturalistic world view. The argument has attracted much philosophical attention, especially since David Hume's rejection of miracles. The debate has turned mainly on how one defines a miracle, understands the laws of nature, and specifies the principles of evidence that govern the explanation of highly unusual historical occurrences. There is considerable debate over whether Hume's case against miracles simply begs the question against “believers.” Detailed exposition is impossible in this short entry, but I argue elsewhere that Hume's case against miracles is most charitably seen as part of his overall case for naturalism (Taliaferro 2005).

There are various arguments that are advanced to motivate religious belief. One of the most interesting and popular is a wager argument often associated with Pascal (1623–1662). It is designed to offer practical reasons to cultivate a belief in God. Imagine that you are unsure whether there is or is not a God. You have it within your power to live on either assumption and perhaps, through various practices, to get yourself to believe one or the other. There would be good consequences of believing in God even if your belief were false, and if the belief were true you would receive even greater good. There would also be good consequences of believing that there is no God, but in this case the consequences would not alter if you were correct. If, however, you believe that there is no God and you are wrong, then you would risk losing the many goods which follow from the belief that God exists and from actual Divine existence. On this basis, it may seem reasonable to believe there is a God.

In different forms the argument may be given a rough edge (for example, imagine that if you do not believe in God and there is a God, hell is waiting). It may be put as an appeal to individual self-interest (you will be better off) or more generally (believers whose lives are bound together can realize some of the goods comprising a mature religious life). Objectors worry about whether one ever is able to bring choices down to just such a narrow selection—for example, to choose either theism or naturalism. Some think the argument is too thoroughly egotistic and thus offensive to religion. Many of these objections have generated some plausible replies (Rescher 1985). For a thoroughgoing exploration of the relevant arguments, see the collection of essays edited by Jeffrey Jordan (1994).

Recent work on Pascalian wagering has a bearing on work on the nature of faith (is it voluntary or involuntary?), its value (when, if ever, is it a virtue?), and relation to evidence (insofar as faith involves belief, is it possible to have faith without evidence?). For an excellent overview and promising analysis, see Chappell (1996), Swinburne (1979), and Schellenberg (2005). A promising feature of such new work is that it is often accompanied by a rich understanding of revelation that is not limited to a sacred scripture, but sees a revelatory role in scripture plus the history of its interpretation, the use of creeds, icons, and so on (see the work of William Abraham).

Two interesting new, rather different developments in debate over the evidence for God's existence need to be observed. John Schellenberg has developed what may be called the “hiddenness of God objection.” Schellenberg argues that perfect love necessarily belongs to any personal Divine being, and that such perfect love entails openness to a personal relationship with the Divine being, a relationship that would require creatures to know or at least be aware of the Divine being. Schellenberg then contends that the fact that there are many nonbelievers in this God of love who would not resist God's disclosure (whether through religious experience or argument) is evidence against the existence of a personal Divine being. The Divine being or God would have been more evident (see Shellenberg 2007; for a reply, see Taliaferro 2009).

In a private communication, Schellenberg has pointed out that his target is not only the God of Christianity but “any personal Divine being.” Making the above adjustment about “any personal Divine being” and Schellenberg's point about “perfect love” and its entailments will make clearer the scope of Schellenberg's project. Taking a very different approach to theism, Paul Moser has recently criticized what he refers to as the preoccupation in philosophy of religion with what he calls “spectator evidence for God,” evidence that can be assessed without involving any interior change that would transform a person morally and religiously. Eschewing fideism, Moser holds that when one seeks God and willingly allows oneself to be transformed by God's perfect love, one's very life can become evidence of the reality of God (see Moser 2008, 2010). While this proposal may worry secular philosophers of religion, Moser is not out of keeping with the pre-Christian Platonic tradition that maintained that inquiry into the good, the true, and the beautiful involved inquiry in which the inquirer needed to endeavor to be good, true, and beautiful.

Another burgeoning question in recent years is whether the cognitive science of religion (CSR) has significance for the truth or rationality of religious commitment. According to CSR, belief in supernatural agents appears to be cognitively natural (Barrett 2004, Keleman 2004, Dennett 2006, De Cruz, H., & De Smedt, J. 2010) and easy to spread (Boyer 2001). The naturalness of religion thesis has led some, including Alvin Plantinga it seems (2011: 60), to imply that we have scientific evidence for Calvin's sensus divinitatis. But others have argued that CSR can intensify the problem of divine hiddenness, since diverse religious concepts are cognitively natural and early humans seem to have lacked anything like a theistic concept (Marsh 2013). There are many other questions being investigated about CSR, such as whether it provides a debunking challenge to religion (Murray and Schloss 2009), whether it poses a cultural challenge for religious outlooks like Schellenberg's Ultimism (Marsh forthcoming), and whether it challenges human dignity (Audi 2013). Needless to say, at the present time, anyhow, there is nothing like a clear consensus on whether CSR should be seen as worrisome, welcome, or neither, by religious believers.

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