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Science and Ethics Bertrand Russell Those who maintain the insufficiency of science, as we have seen in the last two chapters, appeal to the fact that science has nothing to say about "values." This I admit; but when it is inferred that ethics contains truths which cannot be proved or disproved by science, I disagree. The matter is one on which it is not altogether easy to think clearly, and my own views on it are quite different from what they were thirty years ago. But it is necessary to be clear about it if we are to appraise such arguments as those in support of Cosmic Purpose. As there is no consensus of opinion about ethics, it must be understood that what follows is my personal belief, not the dictum of science. The study of ethics, traditionally, consists of two parts, one concerned with moral rules, the other with what is good on its own account. Rules of conduct, many of which have a ritual origin, play a great part in the lives of savages and primitive peoples. It is forbidden to eat out of the chief's dish, or to seethe the kid in its mother's milk; it is commanded to offer sacrifices to the gods, which, at a certain stage of development, are thought most acceptable if they are human beings. Other moral rules, such as the prohibition of murder and theft, have a more obvious social utility, and survive the decay of the primitive theological systems with which they were originally associated. But as men grow more reflective there is a tendency to lay less stress on rules and more on states of mind. This comes from two sources - philosophy and mystical religion. We are all familiar with passages in the prophets and the gospels, in which purity of heart is set above meticulous observance of the Law; and St. Paul's famous praise of charity, or love, teaches the same principle. The same thing will be found in all great mystics, Christian and non-Christian: what they values is a state of mind, out of which, as they hold, right conduct must ensue; rules seem to them external, and insufficiently adaptable to circumstances. One of the ways in which the need of appealing to external rules of conduct has been avoided has been the belief in "conscience," which has been especially important in Protestant ethics. It has been supposed that God reveals to each human heart what is right and what is wrong, so that, in order to avoid sin, we have only to listen to the inner voice. There are, however, two difficulties in this theory: first, that conscience says different things to different people; secondly, that the study of the unconscious has given us an understanding of the mundane causes of conscientious feelings. As to the different deliverances of conscience: George III's conscience told him that he must not grant Catholic Emancipation, as, if he did, he would have committed perjury in taking the Coronation Oath, but later monarchs have had no such scruples. Conscience leads some to condemn the spoliation of the rich by the poor, as advocated by communists; and others to condemn exploitation of the poor by the rich, as practised by capitalists. It tells one man that he ought to defend his country in case of invasion, while it tells another that all participation in warfare is wicked. During the War, the authorities, few of whom had studied ethics, found conscience very puzzling, and were led to some curious decisions, such as that a man might have conscientious scruples against fighting himself, but not against working on the fields so as to make possible the conscription of another man. They held also that, while conscience might disapprove of all war, it could not, failing that extreme position, disapprove of the war then in progress. Those who, for whatever reason, thought it wrong to fight, were compelled to state their position in terms of this somewhat primitive and unscientific conception of "conscience." The diversity in the deliv