The Evidence for God: The Universe

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Lawrence Krauss caused quite a stir with his claim that physics – and, in particular, his book A Universe from Nothing – could explain why the universe exists. In his afterword Richard Dawkins claims that Krauss has torn up ” the last remaining trump card of the theologian, ‘Why is there something rather than nothing?” This is sometimes referred to as the “cosmological argument”; and it is worth evaluating because thinkers from Plato to Leibniz , from Wittgenstein to Sartre to Weinberg have all wondered why there is something rather than nothing. The cosmological argument insists that theism provides the only reasonable answer to that question. There are several versions of this argument that seem persuasive. Here we will focus on cosmological arguments that ask “what is the explanation for the universe’s existence?”[1]

One such argument is based on the principle that there is some explanation for everything that happens or exists. This idea seems compelling. Scientists and historians examine the world believing that there are explanations for the facts they discover; they do not do so in vain. But if laws of nature, billions of fundamental particles, relativistic quantum fields – if entire universes, in effect – can exist without explanation, why should we assume that there are explanations for everything that happens in the universe? Why not give up when we fail to find explanations for something mysterious. There is good reason to accept the principle, whereas denying it seems to lead to scepticism.

So we need to provide an explanation for the existence of the universe. Now some speculative physicists have tried to demonstrate that the universe could come to exist out of nothing. We should note that they have conceded that we should not treat the existence of the universe as a brute fact, in no need of further explanation. We should also note that “nothing” always turns out to be “something”. These accounts always make use of laws of nature and strange fields or unimaginable forces. By “nothing” they mean “nothing-like-our-space-time-universe”.

But in metaphysics, and indeed, in ordinary language, “nothing” typically means “nothing- at -all!” No laws, no energy, no potential, no activity; this is why we cannot imagine “nothing”. We immediately think of a black, empty space. In which case, of course, we are imagining something. We are imagining a space and darkness. But nothing actually means “non-being”; there isn’t anything to imagine. It cannot be described by the laws of physics.  There is nothing to describe!

Perhaps we could argue that each state of the universe is explained by the state just prior to that. If scientists explain, one by one, all the physical reactions and transformations that have taken place within the universe won’t they explain why the whole universe exists? And suppose the universe is infinitely old. Each state of the universe will then have a full explanation. Won’t we have an explanation for the existence of the universe at that point?

Unfortunately, this does not seem to be the case.  By explaining each physical transformation and reaction in the universe we don’t answer the question “why can transformations or reactions happen at all?” Even if there are infinitely many events, we are still left with the questions – “where did this infinitely long series of events come from?  Why does it involve these laws and not others? Why is any of this happening?”

It is impossible for physics to give an ultimate explanation for the universe. Physics describes a system: a collection of objects – the basic “stuff” of the universe, if you like (for example particles or fields). There are also rules – or laws of nature –  which tell us all the possible states of a system and how that system can evolve over time from one state into another. As Sean Carroll explains:

Ever since Newton, the paradigm for fundamental physics has been the same, and includes three pieces. First, there is the “space of states”: basically, a list of all the possible configurations the universe could conceivably be in. Second, there is some particular state representing the universe at some time, typically taken to be the present. Third, there is some rule for saying how the universe evolves with time.[2]

Now, what physics cannot explain is why the basic stuff exists or why there are rules that govern its behaviour. In other words, physics cannot tell us why a system exists and why it is governed by laws of nature. In other words, physics cannot tell us why there is something rather than nothing. Lawrence Krauss suggests relativistic quantum fields are the basic stuff of the universe and that these are governed by the laws of relativistic quantum field theories. Now, interestingly, particles are not part of the basic stuff of the universe on such theories. Rather, they are understood as specific arrangements of the fields. And the fields can be arranged so that there are no particles at all in the universe (what is called a “vacuum state”).

Krauss thinks that such vacuum states are “unstable” and this can explain why there is something rather than nothing; but if the universe we observe today emerged from a vacuum state it would not have come out of “nothing”! Relativistic-quantum-field-theoretical vacuum states are physical states and Krauss would not have explained those! Furthermore, Krauss would not have explained the laws of nature. Suppose the laws of quantum mechanics are explained by some deeper law. Well, what is the explanation for that law? Physics presupposes laws of nature: it cannot, ultimately, explain them.

But why should we look for a creator to explain the universe? Well, we have already argued that everything that exists has an explanation for its existence; and  the universe cannot explain its own existence, and science cannot explain the universe’s existence. So theism seems like a live option. Here we can introduce another principle: we should push our explorations as far as possible; we should try to understand as much as we possibly can. A good explanation will have power – it will make our observations seem less surprising; it will also account for the evidence as simply as possible. However, sooner or later we will reach a stopping point. When our explanations no longer enlighten the evidence, when they become more and more complex, when they make the facts seem more mysterious, we will have reached the limits of our understanding. We need a stopping point for our explanations; and, when explaining the existence of the universe it seems reasonable to make God that stopping point.

 There are two types of explanation. Scientific explanations deal with impersonal objects and laws of nature; we observe and measure how some events regularly follow others. We then use our knowledge of those regularities to explain some state of affairs. But we are asking why there are impersonal objects, and why there are laws of nature! So there cannot be a scientific explanation for the existence of the universe, because there can be no such explanation without laws of nature and the physical objects they describe. Yet that is exactly what we are trying to explain when we ask “why does the universe exist?”However, there are also agent explanations. These do not depend on impersonal objects and laws; rather, they describe an agent’s powers, and then give reasons why such an agent would want to bring an event about[3]. We all know what a person, or an agent, is. We can’t help but think of ourselves, and others, as agents who have purposes and act on those purposes. This is how we explain and predict what other people do[4].

Theism provides an agent explanation for our universe. It describes an agent, God, who has the power to bring the universe about. And God would have good reasons to bring an ordered universe about; it allows him to create things of beauty and wonder. If God exists, by definition, he could not be explained by anything outside himself. God could not have a beginning; whereas it is at the very least possible that the universe has a beginning. At this point we can give no further explanation; because God is unlimited in power, there is nothing outside God that could explain his existence. We cannot gain any more understanding in this area, so our enquiry is complete

There are other reasons for thinking that God is the best stopping point for our explanation: the differences between God and the universe strongly suggest that God is a suitable terminating point for explanation since, if he exists, he must be the terminating point. If God exists (and most atheists grant that this possibility) there could not be any cause of his existence and so his existence could not be explained by anything outside of himself. By contrast, it seems entirely possible that the universe could have a cause and hence an explanation. Second, if God exists, there could not have been a beginning to his existence, whereas there is good evidence that our universe probably did have a beginning (and it certainly could have had a beginning)

Third, many theists have argued that if God exists his existence is necessary in the sense that he could not have failed to exist.By contrast, the universe appears to be contingent: if it has an explanation, it must be explained by something beyond itself. Why think that God’s existence is “necessary”? What does that mean? If God is a  “Necessary Being” no matter what else is true, then God must exist. It is impossible for God not to exist! To understand that, we need to reflect on the meaning of “God” (and atheists must reflect on the meaning of “God”: one cannot reject an hypothesis before one even considers what that hypothesis means!)

God is defined as a maximally great being (MGB) – the greatest thing that we can conceive. Why would we define God as a “Maximally Great Being”? Well, God is meant to be the being most worthy of worship. If there was a being greater than God, it would be most worthy of worship.So, by definition, if God exists God is a Maximally Great Being. Theism fills out that definition by describing God as having at least four properties. (i) Maximal Power (ii) Maximal Knowledge (iii) Personhood (iv) Self-existent. “Maximal knowledge” and “Maximal power” simply mean that there are no limits on what God knows and what God can do, other than the limits of what is logically possible.  Now physical beings have limitations by nature – the physical universe is limited by time and space and energy. So if there is a God he would have to transcend the limitations of the physical universe.

“Personhood” simply means that God has beliefs, is free to choose and to make plans, and he can bring some of his desires about. That’s all it takes to be a person. “Self-existent” just means that nothing made God, and God made everything else. Nothing else made God, and everything else that exists depends on him to exist. That is to say, God depends on nothing else for his existence. So God is unlimited, personal power. We all know what it is to be personal: to be thinking, conscious beings. We can all readily experience personal power – this is simply the power to make choices. Our power is quite limited in nature, as we are finite physical beings. As sole creator, God’s power and awareness could not be limited by anything else. So, because God would be aware of everything that he could do, and everything that he has done, God would know every truth. This idea of God is perfectly meaningful; and if science has taught us anything it is that we should not dismiss an idea because it seems strange or difficult to imagine.

So what explains God? Well, nothing external to God. If that were the case, God would be dependent on something else for his existence, and he would not be the MGB. Asking “who made God?” is rather like asking “what does the colour red sound like?” It simply indicates that you don’t understand the concept in question. Because God simply is unlimited intentional power – or less technically, unlimited power and love – nothing can limit God. No force or state of affairs could prevent God’s existence.

So everything that exists has an explanation, including God. God is only limited by his choices and the laws of logic. And God has the power to bring the universe about. The universe is limited because it is composed of limited physical forces and particles. So here is the key point: unlike the universe, God is explained by his own nature. God is what philosophers describe as a “Necessary Being” – no matter what else is true, God must exist. It is impossible for God not to exist! This is why God’s existence needs no further explanation and God can explain the existence of the universe.

 

 

Bibliography

David Albert “On the Origin of Everything ‘A Universe From Nothing,’ by Lawrence M. Krauss” http://www.nytimes.com/2012/03/25/books/review/a-universe-from-nothing-by-lawrence-m-krauss.html?pagewanted=all (retrieved 15/11/14)

Lawrence Krauss A Universe from Nothing 

Alexander Pruss and Richard M. Gale, “Cosmological and teleological arguments”, in: William J. Wainwright (ed.), Oxford Handbook of Philosophy of Religion, Oxford: Oxford University Press, 2005

Alexander Pruss “The Leibnizian Cosmological Argument” in: Craig and Moreland (ed.), The Blackwell Companion to Natural Theology (2009)

Richard Swinburne The Existence of God (Oxford:2004)

 


[1] Or the “argument from contingent existence”, to distinguish it from the Kalam cosmological argument.

[2] Carroll goes on to explain

“Quantum mechanics, in particular, is a specific yet very versatile implementation of this scheme. (And quantum field theory is just a particular example of quantum mechanics, not an entirely new way of thinking.) The states are “wave functions,” and the collection of every possible wave function for some given system is “Hilbert space.” The nice thing about Hilbert space is that it’s a very restrictive set of possibilities (because it’s a vector space..); once you tell me how big it is (how many dimensions), you’ve specified your Hilbert space completely. This is in stark contrast with classical mechanics, where the space of states can get extraordinarily complicated. And then there is a little machine — “the Hamiltonian” — that tells you how to evolve from one state to another as time passes. Again, there aren’t really that many kinds of Hamiltonians you can have; once you write down a certain list of numbers (the energy eigenvalues…) you are completely done.”

[3] See our article “Agent Explanations: a Guide for the Perplexed” for more detail

[4] Won’t brain science someday replace this way of thinking? Maybe, but probably not. In any case this objection misses the point. We don’t need scientific explanations involving brain states to understand  what other people will do. We just need to think of them as rational agents. Agent explanations are non-scientific explanations which are conceptually clear and practically useful. What more can you want from a type of explanation?

 

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The New Theism

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In his Letter to a Christian Nation, Sam Harris attempts to persuade his fellow Americans that their belief in God is both irrational and dangerous. He sees his book as the product of failure, however, lamenting ‘the failure of the many brilliant attacks upon religion that preceded it, the failure of our schools to announce the death of God in a way that each generation can understand’.[1] Harris is firmly convinced that there is no God and believes that if people had been more rational the very idea of God would have died out a long time ago. His hope is that one day humans will overcome their delusions and ‘look back upon this period in human history with horror and amazement’ and wonder ‘how could it have been possible for people to believe such things in the twenty-first century?’[2] And yet he is forced to admit that ‘the prospects for eradicating religion in our time do not seem good’.[3]

Harris’s fellow new atheists, Richard Dawkins and Christopher Hitchens, express similar sentiments. In particular, they also think that even if belief in God was plausible in the past, this is no longer the case. In his book God is Not Great, Hitchens claims that ‘religion has run out of justifications’ and that ‘thanks to the telescope and microscope, it no longer offers an explanation of anything important’.[4] Similarly, in The God Delusion, Dawkins states that ‘historically, religion aspired to explain our own existence and the nature of the universe’, but goes on to say that ‘in this role it is now completely superseded by science’.[5] And it comes as no surprise that they have no time for specifically Christian beliefs about Jesus based on the Gospels. Comparing the Gospels to a novel by Dan Brown, Dawkins claims that ‘the only difference between The Da Vinci Code and the gospels is that the gospels are ancient fiction while The Da Vinci Code is modern fiction’.[6] Hitchens declares the New Testament to be ‘a work of crude carpentry, hammered together long after its purported events’[7] and points to the error of thinking the four Gospels are ‘in any sense a historical record’.[8]

Some people will think that Harris, Dawkins and Hitchens provide an easy target since they are so extreme in their condemnation of belief in God. This is a fair point and indeed many books have pointed out the failings in their arguments.[9] However, there are many people who are not so extreme, but who nevertheless accept some of the central claims of the new atheists. In particular, they accept a common story, which goes something like this. Up until about the seventeenth century, almost everyone believed in God and there seemed to be good reasons for such belief. After that, everything changed. During a period known as the Enlightenment, various thinkers showed that the reasons for believing in God turned out to be flawed. At the same time, the progress of science meant that there was less for God to explain and so he became redundant. People also began to subject the Gospels to scrutiny and found that they did not give an accurate account of what actually happened. As time has passed, the case for God and the Gospels has become progressively weaker until now, in the twenty-first century, no rational person could take it seriously.

Here I want to argue that this story is a modern myth. Admittedly, it is a myth that might have seemed much more plausible fifty years ago. But a lot has happened in the last fifty years to shatter this myth, yet Harris, Dawkins and Hitchens seem completely oblivious to this fact. Their surprise that belief in God lingers on might have been understandable in the 1950s or 60s, but it is inexcusable in the early twenty-first century. To make my case, I want to turn to three areas of scholarship that have changed dramatically in this period: philosophy, science and biblical studies.

Reason and Belief in God

Philosophers have long debated the question of God’s existence. Often the reasons given in support of God’s existence have been based on commonsense intuitions shared by many people. For example, arguably the most fundamental question humans have asked is ‘why is there something rather than nothing?’ Why, in other words, does the physical universe exist? We can explain the existence of certain things within the universe, but surely the universe itself requires explanation. Such an explanation must be something (or someone) that is not part of the physical universe and yet has the power to bring the universe into existence. This provided one reason for belief in God. Another reason is based on the fact that when we see a beautiful painting or a complex watch, we know that intelligence must have been involved. How much more, it was argued, must the order, beauty and complexity we see around us in the natural world also be the result of intelligence.

These kinds of arguments came in for serious criticism during the 18th and 19th centuries. Whatever the merits of these criticisms, the dominant position amongst philosophers in the first half of the twentieth century was that the case for God’s existence was very weak. In fact, many went further and claimed that the very concept of God was meaningless. The idea was that for something to be meaningful it had to capable of being verified in terms of the five senses. Since God’s existence could not be verified in this way, God (and theology more generally) were designated as nonsense. It was difficult to see how the case for God could get any worse!

But then things changed. The claim that the concept of God was meaningless was rejected. After all, the idea that ‘for something to be meaningful it had to be capable of being verified’ was not itself capable of being verified. In the late 1960s and 1970s Christian philosophers showed that many of the reasons given for rejecting belief in God weren’t nearly as persuasive as many atheists had assumed. Some, such as Alvin Plantinga, argued that just because God’s existence could not be proved logically to the satisfaction of atheists, this did not mean it was irrational to believe in God.[10] At the same time, however, many of the traditional arguments for God’s existence started to make a comeback through the work of people like Richard Swinburne and William Lane Craig. Often the approach adopted has not been to try to prove with 100% certainty that God exists, but instead to show that on the basis of a whole range of features of the universe the cumulative case for God is very strong.[11]

This is not to say that the majority of philosophers believe in God, but belief in God and the central claims of Christianity (such as the resurrection of Jesus) are not at all uncommon and are regularly defended in philosophical circles today. There are few who would have predicted such a transformation fifty years ago. Interestingly, a significant factor in this change came from a most unexpected source: science. We’ll now turn to that topic.

Science Discovers Evidence for God

In 1965, two scientists Arno Penzias and Robert Wilson were working on a satellite communications project and were puzzled by a signal that was affecting their equipment. They tried various measures to remove the signal, even speculating that it might be due to pigeon droppings, but to no avail. In fact, it turned out to be persistent radiation coming from all directions in space. Subsequently they received the Nobel prize for having discovered what is known as the background microwave radiation. Their discovery was taken as confirming the big bang theory of the origin of the universe. The radiation they discovered was a remnant of the hot, dense initial state of the universe and has been referred to as the ‘afterglow of creation’.

Has science really shown that the universe had a beginning? By far the dominant view of scientists is that the answer is ‘yes’. Many atheists have resisted this conclusion, however. If the entire physical universe had a beginning as confirmed by the work of Penzias and Wilson, wouldn’t this be scientific confirmation of creation? As the famous cosmologist Stephen Hawking remarked, ‘Many people do not like the idea that time had a beginning, probably because it smacks of divine intervention.’[12] Indeed, Hawking himself attempted to avoid the need for a beginning, but the evidence for a beginning is such that it is very much the dominant scientific view. The problem for atheism is that if the universe had a beginning, how did it come into existence? It surely cannot have simply popped into existence uncaused out of absolutely nothing. It seems much more plausible to believe that it was brought into existence out of nothing by a Creator, which is just what Christians have always believed.[13]

Over the last forty years or so other scientific findings have provided independent lines of support for belief in God. The most obvious example of this is known as the fine-tuning of the universe. Fine-tuning is something we are familiar with in the case of a radio: you won’t be able to listen to your favourite station unless your radio has been tuned in so that the frequency is just right. In a similar way, scientists have discovered that a whole range of features of the universe are tuned so that they have just the right values for life to exist. For example, if the force of gravity or the nuclear forces within atoms were increased or decreased even slightly, then life as we know it would be impossible. What makes these discoveries so amazing is the extent to which the universe is finely tuned. Take the gravitational constant as an example. How finely tuned does it have to be? To one part in a million (106) perhaps? Or one part in a billion (109)? No. In fact, the required accuracy is 1 part in 1040 (that’s a one with 40 zeros after it!). And remember, that’s just for one feature of the universe! It is not just Christians who find this evidence persuasive. Cosmologist Paul Davies claims that ‘the impression of design is overwhelming’.[14]

In Search of Jesus

If the last fifty years have seen renewed reasons for belief in God, backed up in part by scientific discoveries, some of the central claims of Christianity have received support from another surprising source: the field of biblical studies. It may come as a surprise to many readers that in the first half of the twentieth century the dominant view in the field of biblical studies was that the four Gospels found in the New Testament were little more than ancient myths that contained little historical information about Jesus of Nazareth or any of the events they describe. In fact, it was claimed that virtually nothing could be known about the historical character of Jesus, his life, teaching, deeds, death, and certainly not his resurrection. To believe in the Jesus of orthodox Christianity was to believe in a myth that had no basis in historical reality.

Once again, however, the position has changed dramatically. Many scholars began to realise that the attitude adopted towards the Gospels was overly sceptical. By simply studying the Gospels in the same way as other ancient documents and without assuming that they were inspired by God, it became clear that they provided much more reliable historical information than had previously been thought. In the 1970s, a number of scholars approached the Gospels by focussing on the Jewish background to them and the events that were known from other sources to have been taking place around the time of Jesus. When they did this, they found that much of the material in the Gospels made good historical sense and so could not be dismissed easily. At the very least, a rough outline of the life of Jesus, central themes to his teaching, his crucifixion by the Romans and that his disciples claimed to have seen him alive after his death are now all considered to be well-established facts.

A leading scholar in this field of study, Richard Bauckham, has argued at length that the Gospels, far from being late documents that were not based on actual events, are in fact based on the eyewitness testimony of Jesus’ first followers.[15] He shows that older theories, which claimed that the Gospels had been corrupted in a lengthy process of transmission of earlier traditions, are no longer tenable.[16] One of the most prominent contributors to these debates has been NT Wright who has produced several volumes which provide detailed historical arguments for a view of Jesus that is in keeping with orthodox Christianity. This culminated in his book The Resurrection of the Son of God in which he argues that the events following the crucifixion of Jesus are much better explained by the resurrection than any of the other scenarios that have been proposed.[17]

Needless to say, not all scholars working in this area agree with the conclusions reached by Wright, Bauckham and others, just as not all philosophers or scientists believe in God. But the point is that there is a very serious case to be made for an orthodox Christian view of Jesus and the Gospels on historical grounds, just as there is a very serious case to be made for the existence of God.

Conclusion

I have tried to show that in three separate fields of study, which are often considered to have demolished the case for belief in God and the central claims of Christianity, there has been a dramatic change in the last fifty years or so and that this change has been based to a large extent on solid scientific and historical evidence. I’m certainly not claiming that all scholars (or even the majority) in these fields believe in God or are Christians, just that such views are mainstream and supported by good evidence. Of course, Christian faith is about much more than weighing up the evidence, but anyone wishing to find the truth in these matters ought to consider Christianity seriously. Contrary to the wishful thinking of Harris, Dawkins and Hitchens, the case for Christianity is now stronger than it has ever been. Not only is God not dead, he is alive and well and is to be found in areas of scholarship from which he was once banished.[18]


[1] Sam Harris, Letter to a Christian Nation: A Challenge to Faith, London, Bantam Press, 2007, p. 91.

[2] Letter to a Christian Nation, p. 88.

[3] Letter to a Christian Nation, p. 87.

[4] Christopher Hitchens, God is Not Great: the Case Against Religion, London, Atlantic Books, 2007, p. 282.

[5] Richard Dawkins, The God Delusion, London, Bantam Press, 2006, p. 347.

[6] The God Delusion, p. 97.

[7] God is Not Great, p. 110.

[8] God is Not Great, p. 111.

[9] See for example William Lane Craig and Chad Meister (eds.), God is Great, God is Good: Why Believing in God is Reasonable and Responsible, Downers Grove IL, IVP, 2009; Keith Ward, Why There Almost Certainly is a God: Doubting Dawkins, Oxford, Lion, 2008.

[10] Alvin Plantinga, Warranted Christian Belief, Oxford, Oxford University Press, 2000.

[11] Richard Swinburne, The Existence of God, 2nd ed., Oxford, Oxford University Press, 2004; J. P. Moreland and William Lane Craig, Philosophical Foundations for a Christian Worldview, Downers Grove IL, IVP, 2003.

[12] Stephen W. Hawking, A Brief History of Time, London, Bantam Press, 1988, p. 46.

[13] For more on this topic, see for example Robert Jastrow, God and the Astronomers, 2nd ed., New York, Norton, 1992.

[14] Paul Davies, The Cosmic Blueprint, New York, Simon and Schuster, 1988, p. 203.

[15] Richard Bauckham, Jesus and the Eyewitnesses: the Gospels as Eyewitness Testimony, Grand Rapids MI, Eerdmans, 2006.

[16] On this point, see also James D. G. Dunn, Jesus Remembered, Grand Rapids MI, Eerdmans, 2003.

[17] N.T. Wright, The Resurrection of the Son of God, Minneapolis MN, Fortress Press, 2003.

[18] See William Lane Craig, ‘God is Not Dead Yet’, Christianity Today, July, 2008.

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