Father Frederick C. Copleston (Jesuit Catholic priest) versus Bertrand Russell (agnostic philosopher, picture right)

This debate was a Third Programmme broadcast of the British Broadcasting Corporation in 1948. Reprinted in several sources, the following is from Bertrand Russell On God and Religion edited by Al Seckel (Prometheus Books). 

A DEBATE ON THE EXISTENCE OF GOD

Bertrand Russell [hereafter R:] and F.C. Copleston [hereafter C:]

C: As we are going to discuss the existence of God, it might perhaps be as well to come to some provisional agreement as to what we understand by the term "God." I presume that we mean a supreme personal being -- distinct from the world and creator of the world. Would you agree -- provisionally at least -- to accept this statement as the meaning of the term "God"? 

R: Yes, I accept this definition. 

C: Well, my position is the affirmative position that such a being actually exists, and that His existence can be proved philosophically. Perhaps you would tell me if your position is that of agnosticism or of atheism. I mean, would you say that the non-existence of God can be proved? 

R: No, I should not say that: my position is agnostic. 

C: Would you agree with me that the problem of God is a problem of great importance? For example, would you agree that if God does not exist, human beings and human history can have no other purpose than the purpose they choose to give themselves, which -- in practice -- is likely to mean the purpose which those impose who have the power to impose it? 

R: Roughly speaking, yes, though I should have to place some limitation on your last clause. 

C: Would you agree that if there is no God -- no absolute Being -- there can be no absolute values? I mean, would you agree that if there is no absolute good that the relativity of values results? 

R: No, I think these questions are logically distinct. Take, for instance, G. E. Moore's Principia Ethica, where he maintains that there is a distinction of good and evil, that both of these are definite concepts. But he does not bring in the idea of God to support that contention. 

C: Well, suppose we leave the question of good till later, till we come to the moral argument, and I give first a metaphysical argument. I'd like to put the main weight on the metaphysical argument based on Leibniz's argument from "Contingency" and then later we might discuss the moral argument. Suppose I give a brief statement on the metaphysical argument and that then we go on to discuss it? 

R: That seems to me to be a very good plan.

THE ARGUMENT FROM CONTINGENCY

C: Well, for clarity's sake, I'll divide the argument into distinct stages. First of all, I should say, we know that there are at least some beings in the world which do not contain in themselves the reason for their existence. For example, I depend on my parents, and now on the air, and on food, and so on. Now, secondly, the world is simply the real or imagined totality or aggregate of individual objects, none of which contain in themselves alone the reason for their existence. There isn't any world distinct from the objects which form it, any more than the human race is something apart from the members. Therefore, I should say, since objects or events exist, and since no object of experience contains within itself reason of its existence, this reason, the totality of objects, must have a reason external to itself. That reason must be an existent being. Well, this being is either itself the reason for its own existence, or it is not. If it is, well and good. If it is not, then we must proceed farther. But if we proceed to infinity in that sense, then there's no explanation of existence at all. So, I should say, in order to explain existence, we must come to a being which contains within itself the reason for its own existence, that is to say, which cannot not exist. 

R: This raises a great many points and it is not altogether easy to know where to begin, but I think that, perhaps, in answering your argument, the best point at which to begin is the question of necessary being. The word "necessary" I should maintain, can only be applied significantly to propositions. And, in fact, only to such as are analytic -- that is to say -- such as it is self-contradictory to deny. I could only admit a necessary being if there were a being whose existence it is self-contradictory to deny. I should like to know whether you would accept Leibniz's division of propositions into truths of reason and truths of fact. The former -- the truths of reason -- being necessary. 

C: Well, I certainly should not subscribe to what seems to be Leibniz's idea of truths of reason and truths of fact, since it would appear that, for him, there are in the long run only analytic propositions. It would seem that for Leibniz truths of fact are ultimately reducible to truths of reason. That is to say, to analytic propositions, at least for an omniscient mind. Well, I couldn't agree with that. For one thing it would fail to meet the requirements of the experience of freedom. I don't want to uphold the whole philosophy of Leibniz. I have made use of his argument from contingent to necessary being, basing the argument on the principle of sufficient reason, simply because it seems to me a brief and clear formulation of what is, in my opinion, the fundamental metaphysical argument for God's existence. 

R: But, to my mind, "a necessary proposition" has got to be analytic. I don't see what else it can mean. And analytic propositions are always complex and logically somewhat late. "Irrational animals are animals" is an analytic proposition; but a proposition such as "This is an animal" can never be analytic. In fact, all the propositions that can be analytic are somewhat late in the build-up of propositions. 

C: Take the proposition "if there is a contingent being then there is a necessary being." I consider that that proposition hypothetically expressed is a necessary proposition. If you are going to call every necessary proposition an analytic proposition, then -- in order to avoid a dispute in terminology -- I would agree to call it analytic, though I don't consider it a tautological proposition. But the proposition is a necessary proposition only on the supposition that there is a contingent being. That there is a contingent being actually existing has to be discovered by experience, and the proposition that there is a contingent being is certainly not an analytic proposition, though once you know, I should maintain, that there is a contingent being, it follows of necessity that there is a necessary being. 

R: The difficulty of this argument is that I don't admit the idea of a necessary being and I don't admit that there is any particular meaning in calling other beings "contingent." These phrases don't for me have a significance except within a logic that I reject. 

C: Do you mean that you reject these terms because they won't fit in with what is called "modern logic"? 

R: Well, I can't find anything that they could mean. The word "necessary," it seems to me, is a useless word, except as applied to analytic propositions, not to things. 

C: In the first place, what do you mean by "modern logic?" As far as I know, there are somewhat differing systems. In the second place, not all modern logicians surely would admit the meaninglessness of metaphysics. We both know, at any rate, one very eminent modern thinker whose knowledge of modern logic was profound, but who certainly did not think that metaphysics are meaningless or, in particular, that the problem of God is meaningless. Again, even if all modern logicians held that metaphysical terms are meaningless, it would not follow that they were right. The proposition that metaphysical terms are meaningless seems to me to be a proposition based on an assumed philosophy.

The dogmatic position behind it seems to be this: What will not go into my machine is non-existent, or it is meaningless; it is the expression of emotion. I am simply trying to point out that anybody who says that a particular system of modern logic is the sole criterion of meaning is saying something that is over-dogmatic; he is dogmatically insisting that a part of philosophy is the whole of philosophy. After all, a "contingent" being is a being which has not in itself the complete reason for its existence that's what I mean by a contingent being. You know, as well as I do, that the existence of neither of us can be explained without reference to something or somebody outside us, our parents, for example. A "necessary" being, on the other hand means a being that must and cannot not exist. You may say that there is no such being, but you will find it hard to convince me that you do not understand the terms I am using. If you do not understand them, then how can you be entitled to say that such a being does not exist, if that is what you do say? 

R: Well, there are points here that I don't propose to go into at length. I don't maintain the meaninglessness of metaphysics in general at all. I maintain the meaninglessness of certain particular terms -- not on any general ground, but simply because I've not been able to see an interpretation of those particular terms. It's not a general dogma -- it's a particular thing. But those points I will leave out for the moment. And I will say that what you have been saying brings us back, it seems to me, to the ontological argument that there is a being whose essence involves existence, so that his existence is analytic. That seems to me to be impossible, and it raises, of course, the question what one means by existence, and as to this, I think a subject named can never be significantly said to exist but only a subject described. And that existence, in fact, quite definitely is not a predicate. 

C: Well, you say, I believe, that it is bad grammar, or rather bad syntax to say for example "T. S. Eliot exists"; one ought to say, for example, "He, the author of Murder in the Cathedral, exists." Are you going to say that the proposition, "The cause of the world exists," is without meaning? You may say that the world has no cause; but I fail to see how you can say that the proposition that "the cause of the world exists" is meaningless. Put it in the form of a question: "Has the world a cause?" or "Does a cause of the world exist?" Most people surely would understand the question, even if they don't agree about the answer. 

R: Well, certainly the question "Does the cause of the world exist?" is a question that has meaning. But if you say "Yes, God is the cause of the world" you're using God as a proper name; then "God exists" will not be a statement that has meaning; that is the position that I'm maintaining. Because, therefore, it will follow that it cannot be an analytic proposition ever to say that this or that exists. For example, suppose you take as your subject "the existent round-square," it would look like an analytic proposition that "the existent round- square exists," but it doesn't exist. 

C: No, it doesn't, then surely you can't say it doesn't exist unless you have a conception of what existence is. As to the phrase "existent round-square," I should say that it has no meaning at all. 

R: I quite agree. Then I should say the same thing in another context in reference to a "necessary being." 

C: Well, we seem to have arrived at an impasse. To say that a necessary being is a being that must exist and cannot not exist has for me a definite meaning. For you it has no meaning. 

R: Well, we can press the point a little, I think. A being that must exist and cannot not exist, would surely, according to you, be a being whose essence involves existence. 

C: Yes, a being the essence of which is to exist. But I should not be willing to argue the existence of God simply from the idea of His essence because I don't think we have any clear intuition of God's essence as yet. I think we have to argue from the world of experience to God. 

R: Yes, I quite see the distinction. But, at the same time, for a being with sufficient knowledge, it would be true to say "Here is this being whose essence involves existence!" 

C: Yes, certainly if anybody saw God, he would see that God must exist. 

R: So that I mean there is a being whose essence involves existence although we don't know that essence. We only know there is such a being. 

C: Yes, I should add we don't know the essence a priori. It is only a posteriori through our experience of the world that we come to a knowledge of the existence of that being. And then one argues, the essence and existence must be identical. Because if God's essence and God's existence was not identical, then some sufficient reason for this existence would have to be found beyond God. 

R: So it all turns on this question of sufficient reason, and I must say you haven't defined sufficient reason" in a way that I can understand -- what do you mean by sufficient reason? You don't mean cause? 

C: Not necessarily. Cause is a kind of sufficient reason. Only contingent being can have a cause. God is His own sufficient reason; and He is not cause of Himself. By sufficient reason in the full sense I mean an explanation adequate for the existence of some particular being. 

R: But when is an explanation adequate? Suppose I am about to make a flame with a match. You may say that the adequate explanation of that is that I rub it on the box. 

C: Well, for practical purposes -- but theoretically, that is only a partial explanation. An adequate explanation must ultimately be a total explanation, to which nothing further can be added. 

R: Then I can only say that you're looking for something which can't be got, and which one ought not to expect to get. 

C: To say that one has not found it is one thing; to say that one should not look for it seems to me rather dogmatic. 

R: Well, I don't know. I mean, the explanation of one thing is another thing which makes the other thing dependent on yet another, and you have to grasp this sorry scheme of things entire to do what you want, and that we can't do. 

C: But are you going to say that we can't, or we shouldn't even raise the question of the existence of the whole of this sorry scheme of things -- of the whole universe? 

R: Yes, I don't think there's any meaning in it at all. I think the word "universe" is a handy word in some connections, but I don't think it stands for anything that has a meaning. 

C: If the word is meaningless, it can't be so very handy. In any case, I don't say that the universe is something different from the objects which compose it (I indicated that in my brief summary of the proof), what I'm doing is to look for the reason, in this case the cause of the objects -- the real or imagined totality of which constitute what we call the universe. You say, I think that the universe -- or my existence if you prefer, or any other existence -- is unintelligible? 

R: First may I take up the point that if a word is meaningless it can't be handy. That sounds well but isn't in fact correct. Take, say, such a word as "the" or "than." You can't point to any object that those words mean, but they are very useful words; I should say the same of "universe." But leaving that point, you ask whether I consider that the universe is unintelligible. I shouldn't say unintelligible -- I think it is without explanation. Intelligible, to my mind, is a different thing. Intelligible has to do with the thing itself intrinsically and not with its relations. 

C: Well, my point is that what we call the world is intrinsically unintelligible, apart from the existence of God. You see, I don't believe that the infinity of the series of events -- I mean a horizontal series, so to speak -- if such an infinity could be proved, would be in the slightest degree relevant to the situation. If you add up chocolates you get chocolates after all and not a sheep. If you add up chocolates to infinity, you presumably get an infinite number of chocolates. So if you add up contingent beings to infinity, you still get contingent beings, not a necessary being. An infinite series of con