DISCUSSION of the problem of evil is complicated by the absence of complete agreement about how the moral/physical evil distinction is to be understood or applied. Ninian Smart,1 for example, takes moral evil to be that evil which is due to human wickedness. Plantinga2 says it is the evil which results from human choice and volition. For both of them the pain and suffering which is brought about by immoral actions is moral evil. McCloskey,3 on the other hand, maintains that moral evil is 'simply immorality'; from which it would follow that the pain and suffering which arise from immoral actions cannot be moral evil, because neither pain nor suffering is immorality. The most likely explanation of such differences would appear to be that, in a confused and confusing way, two different distinctions are being drawn by means of the 'moral'/'physical evil' terminology. In accordance with the first of these, moral evils are those that are brought about by the free choice of human beings, while those natural states or processes of the physical world which commonly cause pain and suffering, together with the pain and suffering they cause, are physical evils. The second distinction would appear to classify evils by reference to their qualities rather than their causal relationships. It is as though this was done by asking of any evil the (vague) question 'Is it a moral or physical phenomenon'. The use of such a distinction would explain McCloskey's definition of moral evil as immorality, and why he says that the term 'physical evil' is not apt because 'suffering . .. is not strictly physical evil'.4 One would arrive at this latter view because, unlike pain, suffering has no physical location nor any other properties that force one to classify it as a physical phenomenon. Having pointed out that the 'moral' /'physical evil' terminology is used in different ways, I ought to explain how I propose to employ it in discussing the problems of moral and physical evil. As far as physical evils go, there is, fortunately, a considerable overlap between the two distinctions and this provides a fund of uncontentious examples on which I draw. For convenience, and because I am mainly concerned with the similarities between moral and physical evils, I speak of pain and suffering being 'involved in' or 'produced by' moral evils, but I could equally well regard these as moral evils, consequences of moral evil, or physical evils. Whenever it is necessary I shall, therefore, rephrase what I have to say in order to allow for alternative methods of classification. Two of the more philosophically interesting of the proposed solutions to the problems of moral and physical evil are: the free will defence (F.W.D.), and the thesis that the existence of physical evils is a logically necessary condition of the existence of certain moral virtues and vices (N.C.D.). It is invariably assumed that these defences are compatible; in the sense that they can, without inconsistency, be incorporated in a theodicy. A look at some of the similarities between moral and physical evils provides us, I believe, with reasons for questioning this assumption. An obvious point about moral evils is that many, if not all of them, either involve or produce pain and suffering; the act of torturing someone involves their production, they may also result from other immoral actions. Yet, physical evils such as diseases, earthquakes and volcanic