Wesley College

Ethics

Introduction

also called  moral philosophy the discipline concerned with what is morally good and bad, right and wrong. The term is also applied to any system or theory of moral values or principles.

How should we live? Shall we aim at happiness or at knowledge, virtue, or the creation of beautiful objects? If we choose happiness, will it be our own or the happiness of all? And what of the more particular questions that face us: is it right to be dishonest in a good cause? Can we justify living in opulence while elsewhere in the world people are starving? Is going to war justified in cases where it is likely that innocent people will be killed? Is it wrong to clone a human being or to destroy human embryos in medical research? What are our obligations, if any, to the generations of humans who will come after us and to the nonhuman animals with whom we share the planet?

Ethics deals with such questions at all levels. Its subject consists of the fundamental issues of practical decision making, and its major concerns include the nature of ultimate value and the standards by which human actions can be judged right or wrong.

The terms ethics and morality are closely related. It is now common to refer to ethical judgments or to ethical principles where it once would have been more accurate to speak of moral judgments or moral principles. These applications are an extension of the meaning of ethics. In earlier usage, the term referred not to morality itself but to the field of study, or branch of inquiry, that has morality as its subject matter. In this sense, ethics is equivalent to moral philosophy.

Although ethics has always been viewed as a branch of philosophy, its all-embracing practical nature links it with many other areas of study, including anthropology, biology, economics, history, politics, sociology, and theology. Yet, ethics remains distinct from such disciplines because it is not a matter of factual knowledge in the way that the sciences and other branches of inquiry are. Rather, it has to do with determining the nature of normative theories and applying these sets of principles to practical moral problems.

The origins of ethics

Mythical accounts

Introduction of moral codes

When did ethics begin and how did it originate? If one has in mind ethics proper—i.e., the systematic study of what is morally right and wrong—it is clear that ethics could have come into existence only when human beings started to reflect on the best way to live. This reflective stage emerged long after human societies had developed some kind of morality, usually in the form of customary standards of right and wrong conduct. The process of reflection tended to arise from such customs, even if in the end it may have found them wanting. Accordingly, ethics began with the introduction of the first moral codes

• Detail of the stela inscribed with the Code of Hammurabi showing the king before the god Shamash, …

Virtually every human society has some form of myth to explain the origin of morality. In the Louvre in Paris there is a black Babylonian column with a relief showing the sun god Shamash presenting the code of laws to Hammurabi (died c. 1750 BC), known as the Code of Hammurabi. The Old Testament account of God's giving the Ten Commandments to Moses (flourished 14th–13th century BC) on Mount Sinai might be considered another example. In the dialogue Protagoras by Plato (428/27–348/47 BC), there is an avowedly mythical account of how Zeus took pity on the hapless humans, who were physically no match for the other beasts. To make up for these deficiencies, Zeus gave humans a moral sense and the capacity for law and justice, so that they could live in larger communities and cooperate with one another.

That morality should be invested with all the mystery and power of divine origin is not surprising. Nothing else could provide such strong reasons for accepting the moral law. By attributing a divine origin to morality, the priesthood became its interpreter and guardian and thereby secured for itself a power that it would not readily relinquish. This link between morality and religion has been so firmly forged that it is still sometimes asserted that there can be no morality without religion. According to this view, ethics is not an independent field of study but rather a branch of theology (see moral theology).

There is some difficulty, already known to Plato, with the view that morality was created by a divine power. In his dialogue Euthyphro, Plato considered the suggestion that it is divine approval that makes an action good. Plato pointed out that, if this were the case, one could not say that the gods approve of such actions because they are good. Why then do they approve of them? Is their approval entirely arbitrary? Plato considered this impossible and so held that there must be some standards of right or wrong that are independent of the likes and dislikes of the gods. Modern philosophers have generally accepted Plato's argument, because the alternative implies that if, for example, the gods had happened to approve of torturing children and to disapprove of helping one's neighbours, then torture would have been good and neighbourliness bad.

The history of Western ethics

Ancient civilizations to the end of the 19th century

The ancient Middle East and Asia

The first ethical precepts must have been passed down by word of mouth from parents and elders, but as societies learned to use the written word, they began to set down their ethical beliefs. These records constitute the first historical evidence of the origins of ethics.

The Middle East

The earliest surviving writings that might be taken as ethics textbooks are a series of lists of precepts to be learned by boys of the ruling class of Egypt, prepared some 3,000 years before the Christian Era. In most cases, they consist of shrewd advice on how to live happily, avoid unnecessary troubles, and advance one's career by cultivating the favour of superiors. There are, however, several passages that recommend more broadly based ideals of conduct, such as the following: rulers should treat their people justly and judge impartially between their subjects; they should aim to make their people prosperous; those who have bread should share it with the hungry; humble and lowly people must be treated with kindness; one should not laugh at the blind or at dwarfs.

Why, then, should one follow these precepts? Did the ancient Egyptians believe that one should do what is good for its own sake? The precepts frequently state that it will profit a man to act justly, as in the maxim “Honesty is the best policy.” They also emphasize the importance of having a good name. These precepts were intended for the instruction of the ruling classes, however, and it is not clear why helping the destitute should have contributed to an individual's good reputation among this class. To some degree, therefore, the authors of the precepts must have thought that to make people prosperous and happy and to be kind to those who have least is not merely personally advantageous but good in itself.

The precepts are not works of ethics in the philosophical sense. No attempt is made to find any underlying principles of conduct that might provide a more systematic understanding of ethics. Justice, for example, is given a prominent place, but there is no elaboration of the notion of justice or any discussion of how disagreements about what is just and unjust might be resolved. Furthermore, there is no probing of ethical dilemmas that may occur if the precepts should conflict with one another. The precepts are full of sound observations and practical wisdom, but they do not encourage theoretical speculation.

The same practical bent can be found in other early codes or lists of ethical injunctions. The great Code of Hammurabi is often said to have been based on the principle of “an eye for an eye, a tooth for a tooth,” as if this were some fundamental principle of justice, elaborated and applied to all cases. In fact, the code reflects no such consistent principle. It frequently prescribes the death penalty for offenses that do not themselves cause death—e.g., for robbery and for accepting bribes. Moreover, even the eye-for-an-eye rule applies only if the eye of the original victim is that of a member of the patrician class; if it is the eye of a commoner, the punishment is a fine of a quantity of silver. Apparently such differences in punishment were not thought to require justification. At any rate, there are no surviving attempts to defend the principles of justice on which the code was based.

The Hebrew people were at different times captives of both the Egyptians and the Babylonians. It is therefore not surprising that the law of ancient Israel, which was put into its definitive form during the Babylonian Exile, shows the influence both of the ancient Egyptian precepts and of the Code of Hammurabi. The book of Exodus refers, for example, to the principle of “life for life, eye for eye, tooth for tooth.” Hebraic law does not differentiate, as the Babylonian law does, between patricians and commoners, but it does stipulate that in several respects foreigners may be treated in ways that it is not permissible to treat fellow Hebrews; for instance, Hebrew slaves, but not others, had to be freed without ransom in the seventh year. Yet, in other respects Hebraic law and morality developed the humane concern shown in the Egyptian precepts for the poor and unfortunate: hired servants must be paid promptly, because they rely on their wages to satisfy their pressing needs; slaves must be allowed to rest on the seventh day; widows, orphans, and the blind and deaf must not be wronged; and the poor man should not be refused a loan. There was even a tithe providing for an incipient welfare state. The spirit of this humane concern was summed up by the injunction to “love thy neighbour as thyself,” a sweepingly generous form of the rule of reciprocity.

The famed Ten Commandments are thought to be a legacy of Semitic tribal law from a time when important commands were taught one for each finger, so that they could be remembered more easily (sets of five or 10 laws are common among preliterate civilizations). The content of the Hebrew commandments differed from other laws of the region mainly in its emphasis on duties to God. This emphasis persisted in the more detailed laws laid down elsewhere; as much as half of such legislation was concerned with crimes against God and ceremonial and ritualistic matters, though there may be other explanations for some of these ostensibly religious requirements concerning the avoidance of certain foods and the need for ceremonial cleansings.

In addition to lengthy statements of the law, the surviving literature of ancient Israel includes both proverbs and the books of the prophets. The proverbs, like the precepts of the Egyptians, are brief statements that do not demonstrate much concern for systematic presentation or overall coherence. They go farther than the Egyptian precepts, however, in urging conduct that is just and upright and pleasing to God. There are correspondingly fewer references to what is needed for a successful career, though it is frequently stated that God rewards the just. In this connection, the Book of Job is notable as an exploration of the problem raised for those who accept this motive for obeying the moral law: why do the best of people frequently suffer the worst misfortunes? The book offers no solution beyond faith in God, but the sharpened awareness of the problem it offers may have influenced some to adopt the belief in reward and punishment in another realm as the only possible solution.

The literature of the prophets contains a good deal of social and moral criticism, though most of it consists of denunciation rather than discussion about what goodness really is or why there should be so much wrongdoing. The Book of Isaiah is especially notable for its early portrayal of a utopia in which “the desert shall blossom as the rose…the wolf also shall dwell with the lamb.…They shall not hurt or destroy in all my holy mountain.”

Ancient Greece

Ancient Greece was the birthplace of Western philosophical ethics. The ideas of Socrates (c. 470–399 BC), Plato, and Aristotle (384–322 BC) will be discussed in the next section. The sudden flowering of philosophy during that period was rooted in the ethical thought of earlier centuries. In the poetic literature of the 7th and 6th centuries BC, there were, as in other cultures, moral precepts but no real attempts to formulate a coherent overall ethical position. The Greeks were later to refer to the most prominent of these poets and early philosophers as the seven sages, and they are frequently quoted with respect by Plato and Aristotle. Knowledge of the thought of this period is limited, for often only fragments of original writings, along with later accounts of dubious accuracy, remain.

Pythagoras (c. 580–c. 500 BC), whose name is familiar because of the geometric theorem that bears his name, is one such early Greek thinker about whom little is known. He appears to have written nothing at all, but he was the founder of a school of thought that touched on all aspects of life and that may have been a kind of philosophical and religious order. In ancient times the school was best known for its advocacy of vegetarianism, which, like that of the Jains, was associated with the belief that after the death of the body, the human soul may take up residence in the body of an animal (see reincarnation). Pythagoreans continued to espouse this view for many centuries, and classical passages in the works of writers such as Ovid (43 BC–AD 17) and Porphyry (234–305) opposing bloodshed and animal slaughter can be traced to Pythagoras.

Ironically, an important stimulus for the development of moral philosophy came from a group of teachers to whom the later Greek philosophers—Socrates, Plato, and Aristotle—were consistently hostile: the Sophists. This term was used in the 5th century to refer to a class of professional teachers of rhetoric and argument. The Sophists promised their pupils success in political debate and increased influence in the affairs of the city. They were accused of being mercenaries who taught their students to win arguments by fair means or foul. Aristotle said that Protagoras (c. 485–c. 410 BC), perhaps the most famous of the Sophists, claimed to teach how “to make the weaker argument the stronger.”

The Epicureans

Although the modern use of the term stoic accurately represents at least a part of the Stoic philosophy, anyone taking the present-day meaning of epicure as a guide to the philosophy of Epicurus (341–270 BC) would go astray. True, the Epicureans regarded pleasure as the sole ultimate good and pain as the sole evil, and they did regard the more refined pleasures as superior, simply in terms of the quantity and durability of the pleasure they provided, to the coarser pleasures. To portray them as searching for these more refined pleasures by dining at the best restaurants and drinking the finest wines, however, is the reverse of the truth. By refined pleasures, Epicurus meant pleasures of the mind, as opposed to the coarse pleasures of the body. He taught that the highest pleasure obtainable is the pleasure of tranquillity, which is to be obtained by the removal of unsatisfied wants. The way to do this is to eliminate all but the simplest wants; these are then easily satisfied even by those who are not wealthy.

Epicurus developed his position systematically. To determine whether something is good, he would ask if it increased pleasure or reduced pain. If it did, it was good as a means; if it did not, it was not good at all. Thus, justice was good but merely as an expedient arrangement to prevent mutual harm. Why not then commit injustice when we can get away with it? Only because, Epicurus says, the perpetual dread of discovery will cause painful anxiety. Epicurus also exalted friendship, and the Epicureans were famous for the warmth of their personal relationships; but, again, they proclaimed that friendship is good only because of its tendency to create pleasure.

Both Stoic and Epicurean ethics were precursors of later trends in Western ethics: the Stoics of the modern belief in equality and the Epicureans of a utilitarian ethics based on pleasure (see below Utilitarianism). The development of these ethical positions, however, was dramatically affected by the spreading from the East of a new religion, Christianity, that was rooted in a Jewish conception of ethics as obedience to a divine authority. With the conversion of Emperor Constantine I (c. 280–337) to Christianity by AD 313, the older schools of philosophy lost their sway over the thinking of the Roman Empire.

 Christian ethics from the New Testament to the Scholastics

Ethics in the New Testament

The apostle Matthew reports Jesus as having said, in the Sermon on the Mount, that he came not to destroy the law of the prophets but to fulfill it. Indeed, when Jesus is regarded as a teacher of ethics, it is clear that he was more a reformer of the Hebrew tradition than a radical innovator. The Hebrew tradition had a tendency to place great emphasis on compliance with the letter of the law; the Gospel accounts of Jesus portray him as preaching against this “righteousness of the scribes and Pharisees,” championing the spirit of the law rather than the letter. This spirit he characterized as one of love, for God and for one's neighbour. But since he was not proposing that the old teachings be discarded, he saw no need to develop a comprehensive ethical system. Christianity thus never really broke with the Jewish conception of morality as a matter of divine law to be discovered by reading and interpreting the word of God as revealed in the Scriptures.

This conception of morality had important consequences for the future development of Western ethics. The Greeks and Romans—and indeed thinkers such as Confucius—did not conceive of a distinctively moral realm of conduct. For them, everything that one did was a matter of practical reasoning, in which one could do either well or poorly. In the more legalistic Judeo-Christian view, however, falling short of what the moral law requires was a much more serious matter than, say, failing to do the household budgets correctly. This distinction between the moral and the nonmoral realms now affects every question in Western ethics, including the way the questions themselves are framed.

Another consequence of the retention of the basically legalistic stance of Jewish ethics was that from the beginning Christian ethics had to deal with the question of how to judge the person who breaks the law from good motives or keeps it from bad motives. The latter half of this question was particularly acute, because the Gospels describe Jesus as repeatedly warning of a coming resurrection of the dead at which time all would be judged and punished or rewarded according to their sins and virtues in this life (see Last Judgment). The punishments and rewards were weighty enough to motivate anyone who took this message seriously, and the warning was given added emphasis by the fact that the resurrection was not going to be long in coming. (Jesus said that it would take place during the lifetime of some of those listening to him.) This is therefore an ethics that invokes external sanctions as a reason for doing what is right. At the same time, it is an ethics that places love above mere literal compliance with the law. These two aspects do not sit easily together. Can one bring oneself to love God and neighbour in order to be rewarded with eternal happiness in another life?

The fact that Jesus and the apostle Paul too believed in the imminence of the Second Coming led them to suggest ways of living that were scarcely feasible on any other assumption: taking no thought for the morrow, turning the other cheek, and giving away all one has. Even Paul's preference for celibacy rather than marriage and his grudging acceptance of the latter on the assumption that “it is better to marry than to burn” makes some sense, once one grasps that he was proposing ethical standards for what he thought would be the last generation on earth. When the expected event did not occur and Christianity became the official religion of the vast and embattled Roman Empire, Christian leaders were faced with the awkward task of reinterpreting these injunctions in a manner more suited for a continuing society.

The new Christian ethical standards did lead to some changes in Roman morality. Perhaps the most vital change was a new sense of the equal moral status of all human beings. As mentioned earlier, the Stoics had been the first to elaborate this conception, grounding equality on the common capacity to reason. For Christians, humans are equal because they are all potentially immortal and equally precious in the sight of God. This caused Christians to condemn a wide variety of practices that had been accepted by both Greek and Roman moralists, including many related to the taking of innocent human life: from the earliest days Christian leaders condemned abortion, infanticide, and suicide. Even killing in war was at first regarded as wrong, and soldiers who had converted to Christianity refused to continue to bear arms. Once the empire became Christian, however, this was one of the inconvenient ideas that had to yield. Despite what Jesus had said about turning the other cheek, church leaders declared that killing in a “just war” was not a sin. The Christian condemnation of killing in gladiatorial games, on the other hand, had a more permanent effect. Finally, but perhaps most important, while Christian emperors continued to uphold the legality of slavery, the Christian church accepted slaves as equals, admitted them to its ceremonies, and regarded the granting of freedom to slaves as a virtuous, if not obligatory, act. This moral pressure led over several hundred years to the gradual disappearance of slavery in Europe.

The Christian contribution to improving the position of slaves can also be linked with the distinctively Christian list of virtues. As noted above, some of the virtues described by Aristotle—for example, greatness of soul—are quite contrary in spirit to Christian virtues such as humility. In general it can be said that, whereas the Greeks and Romans prized independence, self-reliance, magnanimity, and worldly success, Christians emphasized meekness, obedience, patience, and resignation. As the Greeks and Romans conceived virtue, a virtuous slave was almost a contradiction in terms; for Christians, however, there was nothing in the state of slavery that was incompatible with the highest moral character.[i]

St. Augustine

• St. Augustine in His Study, oil on canvas by Vittore Carpaccio, …

At its beginning Christianity had a set of scriptures incorporating many moral injunctions, but it did not have an moral philosophy. The first serious attempt to provide such a philosophy was made by St. Augustine of Hippo (354–430). Augustine was acquainted with a version of Plato's philosophy, and he developed the Platonic idea of the rational soul into a Christian view in which humans are essentially souls, using their bodies as a means to achieve their spiritual ends. The ultimate objective remains happiness, as in Greek ethics, but Augustine conceived of happiness as consisting of the union of the soul with God after the body has died. It was through Augustine, therefore, that Christianity received the Platonic theme of the relative inferiority of bodily pleasures. There was, to be sure, a fundamental difference: whereas for Plato bodily pleasures were inferior in comparison with the pleasures of philosophical contemplation in this world, for Christians they were inferior to the pleasures of spiritual existence in the next world. Moreover, Christians came to regard bodily pleasures not merely as inferior but also as a positive threat to the achievement of spiritual bliss.

It was also important that Augustine could not accept the view, common to so many Greek and Roman philosophers, that philosophical reasoning was the means to achieving wisdom and happiness. For a Christian, of course, wisdom and happiness can be had only through love of God and faith in Jesus Christ as the Saviour. The result was to be, for many centuries, a rejection of the use of unfettered reasoning in ethics.

Augustine was aware of the tension between the dual Christian motivations of love of God and neighbour on the one hand and reward and punishment in the afterlife on the other. He came down firmly on the side of love, insisting that those who keep the moral law through fear of punishment are not really keeping it at all. But it is not ordinary human love, either, that suffices as a motivation for true Christian living. Augustine believed that all human beings bear the burden of Adam's original sin (see Adam and Eve) and so are incapable of redeeming themselves by their own efforts. Only the unmerited grace of God makes possible obedience to the “first greatest commandment” of loving God, and without it one cannot fulfill the moral law. This view made a clear-cut distinction between Christians and pagan moralists, no matter how humble and pure the latter might be; only the former could be saved, because only they could receive the blessing of divine grace. But this gain, as Augustine saw it, was purchased at the cost of denying that man is free to choose good or evil. Only Adam had this choice: he chose for all humanity, and he chose evil.

St. Thomas Aquinas and the Scholastics

After Augustine there were no major developments in ethics in the West until the rise of Scholasticism in the 12th and 13th centuries. Among the first significant works written during this time was a treatise on ethics by the French philosopher and theologian Peter Abelard (1079–1142). His importance in ethical theory lies in his emphasis on intentions. Abelard maintained, for example, that the sin of sexual wrongdoing consists not in the act of illicit sexual intercourse, nor even in the desire for it, but in mentally consenting to that desire. In this he was far more modern than Augustine and more thoughtful than those who even today assert that the mere desire for what is wrong is as wrong as the act itself. Abelard recognized that there is a problem in holding a person morally responsible for the mere existence of physical desires. His ingenious solution was taken up by later medieval writers, and traces of it can still be found in modern discussions of moral responsibility.

Aristotle's ethical writings were not known to scholars in western Europe during Abelard's time. Latin translations became available only in the first half of the 13th century, and the rediscovery of Aristotle dominated later medieval philosophy. Nowhere is his influence more marked than in the thought of St. Thomas Aquinas (1225–74), who is often regarded as the greatest of the Scholastic philosophers and is undoubtedly the most influential, since his teachings became the semiofficial philosophy of the Roman Catholic Church. Such is the respect in which Aquinas held Aristotle that he referred to him simply as The Philosopher. Indeed, it is not too far from the truth to say that the chief aim of Aquinas's work was to reconcile Aristotle's views with Christian doctrine.

Aquinas took from Aristotle the notion of an ultimate end, or goal—a summum bonum—at which all human action is directed; and, like Aristotle, he conceived of this end as necessarily connected with happiness. This conception was Christianized, however, by the idea that happiness is to be found in the love of God. Thus, a person seeks to know God but cannot fully succeed in doing so in this life on Earth. The reward of heaven, where one can know God, is available only to those who merit it, though even then it is given by God's grace rather than obtained by right. Short of heaven, a person can experience only a more limited form of happiness through a life of virtue and friendship, much as Aristotle had recommended.

The blend of Aristotle's teachings and Christianity is also evident in Aquinas's views about right and wrong and about how one comes to know the difference between the two. Aquinas is often described as advocating a “natural law” ethic, but this term is easily misunderstood. The natural law to which Aquinas referred does not require a legislator, any more than do the laws of nature that govern the motions of the planets. An even more common mistake is to imagine that this conception of natural law relies on contrasting what is natural with what is artificial. Aquinas's theory of the basis of right and wrong developed rather as an alternative to the view that morality is determined simply by the arbitrary will of God. Instead of conceiving of right and wrong in this manner as something fundamentally unrelated to human goals and purposes, Aquinas viewed morality as deriving from human nature and the activities that are objectively suited to it.

It is a consequence of this natural law ethics that the difference between right and wrong can be appreciated by the use of reason and reflection on experience. Although Christian revelation may supplement this knowledge in some respects, even pagan philosophers such as Aristotle could understand the essentials of virtuous living. One is, however, likely to err when applying these general principles to the particular cases one confronts in everyday life. Corrupt customs and poor moral education may obscure the conclusions of natural reason. Hence, societies must enact laws of their own to supplement natural law and, where necessary, to coerce those who, because of their own imperfections, are liable to do what is wrong and socially destructive.

It follows too that virtue and human flourishing are linked. When one does what is right, he does what is objectively suited to his true nature. Thus, the promise of heaven is no mere external sanction, rewarding actions to which one would otherwise be indifferent or which may even be against one's interest. On the contrary, Aquinas wrote that “God is not offended by us except by what we do against our own good.” Reward and punishment in the afterlife reinforce a moral law that all humans, Christian as well as pagan, have adequate prior reasons for following.

In arguing for his views, Aquinas was always concerned to show that he had the authority of the Scriptures or the Church Fathers on his side, but the substance of his ethical system is to a remarkable degree based on reason rather than revelation. This is strong testimony to the power of Aristotle's example. Nonetheless, Aquinas absorbed the weaknesses as well as the strengths of the Aristotelian system. In particular, his attempt to base right and wrong on human nature invites the objection that one cannot presuppose human nature to be good. Aquinas might reply that it is good because God made it so, but this merely pushes back one step the issue of the basis of good and bad: Did God make human nature good in accordance with some independent standard of goodness, or would any human nature made by God be good? If one gives the former answer, then one needs an account of the independent standard of goodness. Because this standard cannot be based on human nature (for then the argument would be circular), it is not clear what account Aquinas could offer. If one maintains that any human nature made by God would be good, then one must accept that, if God had made human nature such that humans flourish and achieve happiness by torturing the weak and helpless, that would have been what humans should do in order to live virtuously.

Something resembling this second option—but without the intermediate step of an appeal to human nature—was the position taken by the last of the great Scholastic philosophers, William of Ockham (c. 1285–1347/49). Ockham boldly broke with much that had been taken for granted by his immediate predecessors. Fundamental to his approach was his rejection of the central Aristotelian idea that all things have an ultimate end toward which they naturally tend. He therefore also spurned Aquinas's attempt to base morality on human nature and with it the idea that goodness is closely connected with happiness, which is the ultimate end of human beings. Ockham was thus led to a position that contrasted starkly with almost all previous ethical doctrines in the West. Ockham denied all standards of good and evil that are independent of God's will. What God wills is good; what God condemns is evil. That is all there is to say about the matter. This position is sometimes called a divine approbation theory, because it defines good as whatever is approved by God. As mentioned earlier, it follows from such a position that it is meaningless to describe God himself as good. It also follows that if God had willed humans to torture children, it would be good to do so. As for the actual content of God's will, according to Ockham, that is not a subject for philosophy but rather a matter for revelation and faith.

The rigour and consistency of Ockham's philosophy made it for a time one of the leading schools of Scholastic thought, but eventually it was the philosophy of Aquinas that prevailed in the Roman Catholic Church. After the Reformation, however, Ockham's view was influential among Protestant theologians. Meanwhile, it hastened the decline of Scholastic moral philosophy, because it effectively removed ethics from the sphere of reason.

The Renaissance and the Reformation

The revival of Classical learning and culture that began in 15th-century Italy and then slowly spread throughout Europe did not give immediate birth to any major new ethical theories. Its significance for ethics lies, rather, in a change of focus. For the first time since the conversion of the Roman Empire to Christianity, man, not God, became the chief object of philosophical interest, and the main theme of philosophical thinking was not religion but humanity—the powers, freedom, and accomplishments of human beings (see humanism). This does not mean that there was a sudden conversion to atheism. Most Renaissance thinkers remained Christian, and they still considered human beings as being somehow midway between the beasts and the angels. Yet, even this middle position meant that humans were special. It meant, too, a new conception of human dignity and of the importance of the individual.

Machiavelli

Although the Renaissance did not produce any outstanding moral philosophers, there is one writer whose work is of some importance in the history of ethics: Niccolò Machiavelli (1469–1527). His book The Prince (1513) offered advice to rulers as to what they must do to achieve their aims and secure their power. Its significance for ethics lies precisely in the fact that Machiavelli's advice ignores the usual ethical rules: “It is necessary for a prince, who wishes to maintain himself, to learn how not to be good, and to use this knowledge and not use it, according to the necessities of the case.” There had not been so frank a rejection of morality since the Greek Sophists. So startling is the cynicism of Machiavelli's advice that it has been suggested that The Prince was an attempt to satirize the conduct of the princely rulers of Renaissance Italy. It may be more accurate, however, to view Machiavelli as an early political scientist, concerned only with setting out what human beings are like and how power is maintained, with no intention of passing moral judgment on the state of affairs described. In any case, The Prince gained instant notoriety, and Machiavelli's name became synonymous with political cynicism and deviousness. Despite the chorus of condemnation, the work led to a sharper appreciation of the difference between the lofty ethical systems of philosophers and the practical realities of political life.

The first Protestants

It was left to the English philosopher and political theorist Thomas Hobbes (1588–1679) to take up the challenge of constructing an ethical system on the basis of so unflattering a view of human nature (see below Hobbes). Between Machiavelli and Hobbes, however, there occurred the traumatic breakup of Western Christendom known as the Reformation. Reacting against the worldly immorality apparent in the Renaissance church, Martin Luther (1483–1546), John Calvin (1509–64), and other leaders of the new Protestantism sought to return to the pure early Christianity of the Scriptures, especially as reflected in the teachings of Paul and of the Church Fathers, Augustine foremost among them. They were contemptuous of Aristotle (Luther called him a “buffoon”) and of non-Christian philosophers in general. Luther's standard of right and wrong was whatever God commands. Like William of Ockham, Luther insisted that the commands of God cannot be justified by any independent standard of goodness: good simply means what God commands. Luther did not believe that these commands would be designed by God to satisfy human desires, because he was convinced that human desires are totally corrupt. In fact, he thought that human nature itself is totally corrupt. In any case, Luther insisted that one does not earn salvation by good works; one is justified by faith in Christ and receives salvation through divine grace.

It is apparent that if these premises are accepted, there is little scope for human reason in ethics. As a result, no moral philosophy has ever had the kind of close association with any Protestant church that, for example, the philosophy of Aquinas has had with Roman Catholicism. Yet, because Protestants emphasized the capacity of the individual to read and understand the Gospels without first receiving the authoritative interpretation of the church, the ultimate outcome of the Reformation was a greater freedom to read and write independently of the church hierarchy. This development made possible a new era of ethical thought.

From this time, too, distinctively national traditions of moral philosophy began to emerge; the British tradition, in particular, developed largely independently of ethics on the Continent. Accordingly, the present discussion will follow this tradition through the 19th century before returning to consider the different line of development in continental Europe.

The British tradition from Hobbes to the utilitarians

Hobbes

Thomas Hobbes is an outstanding example of the independence of mind that became possible in Protestant countries after the Reformation. To be sure, God does play an honourable role in Hobbes's philosophy, but it is a dispensable role. The philosophical edifice he constructed stands on its own foundations; God merely crowns the apex. Hobbes was the equal of the Greek philosophers in his readiness to develop an ethical position based only on the facts of human nature and the circumstances in which humans live, and he surpassed even Plato and Aristotle in the extent to which he sought to do this by systematic deduction from clearly stated premises.

Hobbes started with a severe view of human nature: all of man's voluntary acts are aimed at pleasure or self-preservation. This position is known as psychological hedonism, because it asserts that the fundamental motivation of all human action is the desire for pleasure. Like later psychological hedonists, Hobbes was confronted with the objection that people often seem to act altruistically. According to a story told about him, Hobbes was once seen giving alms to a beggar outside St. Paul's Cathedral. A clergyman sought to score a point by asking Hobbes whether he would have given the money had Christ not urged giving to the poor. Hobbes replied that he gave the money because it pleased him to see the poor man pleased. The reply reveals the dilemma that always faces those who propose startling new explanations for human actions: either the theory is flagrantly at odds with how people really behave, or else it must be broadened or diluted to such an extent that it loses much of what made it so shocking in the first place.

Hobbes's definition of good is equally devoid of religious or metaphysical assumptions. A thing is good, according to him, if it is “the object of any man's appetite or desire.” He insisted that the term must be used in relation to a person—nothing is simply good in itself, independently of any person who may desire it. Hobbes may therefore be considered an ethical subjectivist.

Joseph Butler (1692–1752), a bishop of the Church of England, developed Shaftesbury's position in two ways. He strengthened the case for a harmony between morality and enlightened self-interest by claiming that happiness occurs as a by-product of the satisfaction of desires for things other than happiness itself. Those who aim directly at happiness do not find it; those whose goals lie elsewhere are more likely to achieve happiness as well. Butler was not doubting the reasonableness of pursuing one's own happiness as an ultimate aim. Indeed, he went so far as to say that “when we sit down in a cool hour, we can neither justify to ourselves this or any other pursuit, till we are convinced that it will be for our happiness, or at least not contrary to it.” He held, however, that direct and simple egoism is a self-defeating strategy. Egoists will do better for themselves by adopting immediate goals other than their own interests and living their everyday lives in accordance with these more immediate goals.

Butler's second addition to Shaftesbury's account was the idea of conscience. This he conceived as a second natural guide to conduct, alongside enlightened self-interest. Butler believed that there is no inconsistency between the two; he admitted, however, that skeptics may doubt “the happy tendency of virtue,” and for them conscience can serve as an authoritative guide. Just what reason skeptics would have to follow conscience, if they believe its guidance to be contrary to their own happiness, is something that Butler did not adequately explain. Nevertheless, his introduction of conscience as an independent source of moral reasoning reflects an important difference between ancient and modern ethical thinking. The Greek and Roman philosophers would have had no difficulty in accepting everything Butler said about the pursuit of happiness, but they would not have understood his idea of another independent source of rational guidance. Although Butler insisted that the two operate in harmony, this was for him a fortunate fact about the world and not a necessary principle of reason. Thus, his recognition of conscience opened the way for later formulations of a universal principle of conduct at odds with the path indicated by even the most enlightened forms of self-interested reasoning.

The climax of moral sense theory: Hutcheson and Hume

The moral sense school reached its fullest development in the works of two Scottish philosophers, Francis Hutcheson (1694–1746) and David Hume (1711–76). Hutcheson was concerned with showing, against the intuitionists, that moral judgment cannot be based on reason and therefore must be a matter of whether an action is “amiable or disagreeable” to one's moral sense. Like Butler's notion of conscience, Hutcheson's moral sense does not find pleasing only, or even predominantly, those actions that are in one's own interest. On the contrary, Hutcheson conceived moral sense as based on a disinterested benevolence. This led him to state, as the ultimate criterion of the goodness of an action, a principle that was to serve as the basis for the utilitarian reformers: “That action is best which procures the greatest happiness for the greatest numbers.”

Hume, like Hutcheson, held that reason cannot be the basis of morality. His chief ground for this conclusion was that morality is essentially practical: there is no point in judging something good if the judgment does not incline one to act accordingly. Reason alone, however, Hume regarded as “the slave of the passions.” Reason can show people how best to achieve their ends, but it cannot determine what those ends should be; it is incapable of moving one to action except in accordance with some prior want or desire. Hence, reason cannot give rise to moral judgments.

This is an important argument that is still employed in the debate between those who believe that morality is based on reason and those who base it instead on emotion or feelings. Hume's conclusion certainly follows from his premises. Can either premise be denied? As noted above, intuitionists such as Cudworth and Clarke maintained that reason can lead to action. Reason, they would have said, leads one to recognize a particular action as fitting in a given set of circumstances and therefore to do it. Hume would have none of this. “'Tis not contrary to reason,” he provocatively asserted, “to prefer the destruction of the whole world to the scratching of my finger.” To show that he was not embracing the view that only egoism is rational, Hume continued: “'Tis not contrary to reason to choose my total ruin, to prevent the least uneasiness of an Indian or person wholly unknown to me.” His point was simply that to have these preferences is to have certain desires or feelings; they are not matters of reason at all. The intuitionists might insist that moral and mathematical reasoning are analogous, but this analogy was not helpful. Knowing a truth of geometry need not motivate one to act in any way.

Hume's forceful presentation of this argument against a rational basis for morality would have been enough to earn him a place in the history of ethics, but it is by no means his only achievement in this field. In A Treatise of Human Nature (1739–40), he points, almost as an afterthought, to the fact that writers on morality regularly start by making various observations about human nature or about the existence of a god—all statements of fact about what is the case—and then suddenly switch to statements about what ought or ought not to be done. Hume says that he cannot conceive how this new relationship of “ought” can be deduced from the preceding statements that were related by “is,” and he suggests that these authors should explain how this deduction is to be achieved. The point has since been called Hume's Law and taken as proof of the existence of a gulf between facts and values, or between “is” and “ought.” This places too much weight on Hume's brief and ironic comment, but there is no doubt that many writers, both before and after Hume, have argued as if values could easily be deduced from facts. They can usually be found to have smuggled values in somewhere. Attention to Hume's Law makes it easy to detect such logically illicit contraband.

Utilitarianism

At this point the argument over whether morality is based on reason or on feelings was temporarily exhausted, and the focus of British ethics shifted from such questions about the nature of morality as a whole to an inquiry into which actions are right and which are wrong. Today, the distinction between these two types of inquiry would be expressed by saying that, whereas the 18th-century debate between intuitionism and the moral sense school dealt with questions of metaethics, 19th-century thinkers became chiefly concerned with questions of normative ethics. Metaethical positions concerning whether ethics is objective or subjective, for example, do not tell one what one ought to do. That task is the province of normative ethics.

Paley

The impetus to the discussion of normative ethics was provided by the challenge of utilitarianism. The essential principle of utilitarianism was, as mentioned earlier, put forth by Hutcheson. Curiously, it was further developed by the widely read theologian William Paley (1743–1805), who provides a good example of the independence of metaethics and normative ethics. His position on the nature of morality was similar to that of Ockham and Luther—namely, he held that right and wrong are determined by the will of God. Yet, because he believed that God wills the happiness of his creatures, his normative ethics were utilitarian: whatever increases happiness is right; whatever diminishes it is wrong.

 Bentham

Notwithstanding these predecessors, Jeremy Bentham (1748–1832) is properly considered the father of modern utilitarianism. It was he who made the utilitarian principle serve as the basis for a unified and comprehensive ethical system that applies, in theory at least, to every area of life. Never before had a complete, detailed system of ethics been so consistently constructed from a single fundamental ethical principle.

Bentham's ethics began with the proposition that nature has placed human beings under two masters: pleasure and pain. Anything that seems good must be either directly pleasurable or thought to be a means to pleasure or to the avoidance of pain. Conversely, anything that seems bad must be either directly painful or thought to be a means to pain or to the deprivation of pleasure. From this Bentham argued that the words right and wrong can be meaningful only if they are used in accordance with the utilitarian principle, so that whatever increases the net surplus of pleasure over pain is right and whatever decreases it is wrong.

Bentham then considered how one is to weigh the consequences of an action and thereby decide whether it is right or wrong. One must, he says, take account of the pleasures and pains of everyone affected by the action, and this is to be done on an equal basis: “Each to count for one, and none for more than one.” (At a time when Britain had a major trade in slaves, this was a radical suggestion; and Bentham went farther still, explicitly extending consideration to nonhuman animals.) One must also consider how certain or uncertain the pleasures and pains are, their intensity, how long they last, and whether they tend to give rise to further feelings of the same or of the opposite kind.

Bentham did not allow for distinctions in the quality of pleasure or pain as such. Referring to a popular game, he affirmed that “quantity of pleasure being equal, pushpin is as good as poetry.” This led his opponents to characterize his philosophy as one fit for pigs. The charge is only half true. Bentham could have defended a taste for poetry on the grounds that, whereas one tires of mere games, the pleasures of a true appreciation of poetry have no limit; thus, the quantities of pleasure obtained by poetry are greater than those obtained by pushpin. All the same, one of the strengths of Bentham's position is its honest bluntness, which it owes to his refusal to be fazed by the contrary opinions either of conventional morality or of refined society. He never thought that the aim of utilitarianism was to explain or to justify ordinary moral views; it was, rather, to reform them.

 Mill

John Stuart Mill (1806–73), Bentham's successor as the leader of the utilitarians and the most influential British thinker of the 19th century, had some sympathy for the view that Bentham's position was too narrow and crude. His essay Utilitarianism (1861) introduced several modifications, all aimed at a broader view of what is worthwhile in human existence and at implications less shocking to established moral convictions. Although his position was based on the maximization of happiness (and this is said to consist of pleasure and the absence of pain), he distinguished between pleasures that are higher and those that are lower in quality. This enabled him to say that it is “better to be Socrates dissatisfied than a fool satisfied.” The fool, he argued, would be of a different opinion only because he has not experienced both kinds of pleasures.

Mill sought to show that utilitarianism is compatible with moral rules and principles relating to justice, honesty, and truthfulness by arguing that utilitarians should not attempt to calculate before each action whether that particular action will maximize utility. Instead, they should be guided by the fact that an action falls under a general principle (such as the principle that people should keep their promises), and adherence to that general principle tends to increase happiness. Only under special circumstances is it necessary to consider whether an exception may have to be made.

Rights theories

Although appeals to rights have been common since the great 18th-century declarations of the rights of man (see Declaration of the Rights of Man and of the Citizen; Declaration of Independence), most ethical theorists have treated rights as something that must be derived from more basic ethical principles or else from accepted social and legal practices. However, beginning in the late 20th century, especially in the United States, rights were commonly appealed to as a fundamental moral principle. Anarchy, State, and Utopia (1974), by the American philosopher Robert Nozick (1938–2002), is an example of such a rights-based theory, though it is mostly concerned with applications in the political sphere and says very little about other areas of normative ethics. Unlike Rawls, who for all his disagreement with utilitarianism was still a consequentialist of sorts, Nozick was a deontologist. The rights to life, liberty, and legitimately acquired property are absolute, he insists; no act that violates them can be justified, no matter what the circumstances or the consequences. Nozick also held that one has no duty to help those in need, no matter how badly off they may be, provided that their neediness is not one's fault. Thus, governments may appeal to the generosity of the rich, but they may not tax them against their will in order to provide relief for the poor.

The American philosopher Ronald Dworkin argued for a different view in Taking Rights Seriously (1977) and subsequent works. Dworkin agreed with Nozick that rights should not be overridden for the sake of improved welfare: rights are, he said, “trumps” over ordinary consequentialist considerations. In Dworkin's theory, however, the rights to equal concern and respect are fundamental, and observing these rights may require one to assist others in need. Accordingly, Dworkin's view obliges the state to intervene in many areas to ensure that rights are respected.

In its emphasis on equal concern and respect, Dworkin's theory was part of a late 20th-century revival of interest in Kant's principle of respect for persons. This principle, like the value of justice, was often said to be ignored by utilitarians. Rawls invoked Kant's principle when setting out the underlying rationale of his theory of justice. The principle, however, suffers from a certain vagueness, and attempts to develop it into something more specific that could serve as the basis of a complete ethical theory have not been wholly successful.

Natural law ethics

During most of the 20th century, most secular moral philosophers considered natural law ethics to be a lifeless medieval relic, preserved only in Roman Catholic schools of moral theology. In the late 20th century the chief proponents of natural law ethics continued to be Roman Catholic, but they began to defend their position with arguments that made no explicit appeal to religious beliefs. Instead, they started from the claim that there are certain basic human goods that should not be acted against in any circumstances. The list of goods offered by John Finnis in the aforementioned Natural Law and Natural Rights, for example, included life, knowledge, play, aesthetic experience, friendship, practical reasonableness, and religion. The identification of these goods is a matter of reflection, assisted by the findings of anthropologists. Furthermore, each of the basic goods is regarded as equally fundamental; there is no hierarchy among them.

It would, of course, be possible to hold a consequentialist ethics that identified several basic human goods of equal importance and judged actions by their tendency to produce or maintain these goods. Thus, if life is a good, any action that led to a preventable loss of life would, other things being equal, be wrong. Proponents of natural law ethics, however, rejected this consequentialist approach; they insisted that it is impossible to measure the basic goods against each other. Instead of relying on consequentialist calculations, therefore, natural law ethics assumed an absolute prohibition of any action that aims directly against any basic good. The killing of the innocent, for instance, is always wrong, even in a situation where, somehow, killing one innocent person is the only way to save thousands of innocent people. What is not adequately explained in this rejection of consequentialism is why the life of one innocent person cannot be measured against the lives of a thousand innocent people—assuming that nothing is known about any of the people involved except that they are innocent.

Natural law ethics recognizes a special set of circumstances in which the effect of its absolute prohibitions would be mitigated. This is the situation in which the so-called doctrine of double effect would apply. If a pregnant woman, for example, is found to have a cancerous uterus, the doctrine of double effect allows a doctor to remove it, notwithstanding the fact that such action would kill the fetus. This allowance is made not because the life of the woman is regarded as more valuable than the life of the fetus, but because in removing the uterus the doctor is held not to aim directly at the death of the fetus; instead, its death is an unwanted and indirect side effect of the laudable act of removing a diseased organ. In cases where the only way of saving the woman's life is by directly killing the fetus, the doctrine provides a different answer. Before the development of modern obstetric techniques, for example, the only way of saving a woman whose fetus became lodged during delivery was to crush the fetus's skull. Such a procedure was prohibited by the doctrine of double effect, for in performing it the doctor would be directly killing the fetus. This position was maintained even in cases where the death of the mother would certainly also bring about the death of the fetus. In these cases, the claim was made that the doctor who killed the fetus directly would be guilty of murder, but the deaths from natural causes of the mother and the fetus would not be his doing. The example is significant, because it indicates the lengths to which proponents of natural law ethics were prepared to go in order to preserve the absolute nature of their prohibitions.

Virtue ethics

In the last two decades of the 20th century, there was a revival of interest in the Aristotelian idea that ethics should be based on a theory of the virtues rather than on a theory of what one ought to do. This revival was influenced by Elizabeth Anscombe and stimulated by Philippa Foot, who in essays republished in Virtues and Vices (1978) explored how acting ethically could be in the interest of the virtuous person. The Scottish philosopher Alasdair MacIntyre, in his pessimistic work After Virtue (1980), lent further support to virtue ethics by suggesting that what he called “the Enlightenment Project” of giving a rational justification of morality had failed. In his view, the only way out of the resulting moral confusion was to ground morality in a tradition, such as the tradition represented by Aristotle and Aquinas.

Virtue ethics, in the view of its proponents, promised a reconciliation of morality and self-interest. If, for example, generosity is a virtue, then a virtuous person will desire to be generous; and the same will hold for the other virtues. If acting morally is acting as a virtuous human being would act, then virtuous human beings will act morally because that is what they are like, and that is what they want to do. But this point again raised the question of what human nature is really like. If virtue ethicists hope to develop an objective theory of the virtues, one that is valid for all human beings, then they are forced to argue that the virtues are based on a common human nature; but, as was noted above in the discussion of naturalism in ethics, it is doubtful that human nature can serve as a standard of what one would want to call morally correct or desirable behaviour. If, on the other hand, virtue ethicists wish to base the virtues on a particular ethical tradition, then they are implicitly accepting a form of ethical relativism that would make it impossible to carry on ethical conversations with other traditions or with those who do not accept any tradition at all.

A rather different objection to virtue ethics is that it relies on an idea of the importance of moral character that is unsupported by the available empirical evidence. There is now a large body of psychological research on what leads people to act morally, and it points to the surprising conclusion that often very trivial circumstances have a decisive impact. Whether a person helps a stranger in obvious need, for example, largely depends on whether he is in a hurry and whether he has just found a small piece of change. If character plays less of a role in determining moral behaviour than is commonly supposed, an ethics that emphasizes virtuous character to the exclusion of all else will be on shaky ground.

Feminist ethics

In work published from the 1980s, feminist philosophers argued that the prevalent topics, interests, and modes of argument in moral philosophy reflect a distinctively male point of view, and they sought to change the practice of the discipline to make it less male-biased in these respects. Their challenge raised questions in metaethics, normative ethics, and applied ethics. The feminist approach received considerable impetus from the publication of In a Different Voice (1982), by the American psychologist Carol Gilligan. Gilligan's work was written in response to research by Lawrence Kohlberg, who claimed to have discovered a universal set of stages of moral development through which normal human beings pass as they mature into adulthood. Kohlberg claimed that children and young adults gradually progress toward more abstract and more impartial forms of ethical reasoning, culminating in the recognition of individual rights. As Gilligan pointed out, however, Kohlberg's study did not include females. When Gilligan studied moral development in girls and young women, she found less emphasis on impartiality and rights and more on love and compassion for the individuals with whom her subjects had relationships. Although Gilligan's findings and methodology were criticized, her suggestion that the moral outlook of women is different from that of men led to proposals for a distinctly feminist ethics—an “ethics of care.” As developed in works such as Caring (1984), by the American feminist philosopher Nel Noddings, this approach held that normative ethics should be based on the idea of caring for those with whom one has a relationship, whether that of parent, child, sibling, lover, spouse, or friend. Caring should take precedence over individual rights and moral rules, and obligations to strangers may be limited or nonexistent. The approach emphasized the particular situation, not abstract moral principles.

Not all feminist moral philosophers accepted this approach. Some regarded the very idea that the moral perspective of women is more emotional and less abstract than that of men as tantamount to accepting patriarchal stereotypes of women's thinking. Others pointed out that, even if there are “feminine” values that women are more likely to hold than men, these values would not necessarily be “feminist” in the sense of advancing the interests of women. Despite these difficulties, feminist approaches led to new ways of thinking in several areas of applied ethics, especially those concerned with professional fields like education and nursing, as well as in areas that male philosophers in applied ethics had tended to neglect, such as the family.

Ethical egoism

All of the normative theories considered so far have had a universal focus—i.e., the goods they seek to achieve, the character traits they seek to develop, or the principles they seek to apply pertain equally to everyone. Ethical egoism departs from this consensus, because it asserts that moral decision making should be guided entirely by self-interest. One great advantage of such a position is that it avoids any possible conflict between self-interest and morality. Another is that it makes moral behaviour by definition rational (on the plausible assumption that it is rational to pursue one's own interests).

Two forms of egoism may be distinguished. The position of the individual egoist may be expressed as: “Everyone should do what is in my interests.” This is indeed egoism, but it is incapable of being universalized (because it makes essential reference to a particular individual); thus, it is arguably not an ethical principle at all. Nor, from a practical perspective, is the individual egoist likely to be able to persuade others to follow a course of action that is so obviously designed to benefit only the person who is advocating it.

Universal egoism is expressed in this principle: “Everyone should do what is in his own interests.” Unlike the principle of individual egoism, this principle is universalizable. Moreover, many self-interested people may be disposed to accept it, because it appears to justify acting on desires that conventional morality might prevent one from satisfying. Universal egoism is occasionally seized upon by popular writers, including amateur historians, sociologists, and philosophers, who proclaim that it is the obvious answer to all of society's ills; their views are usually accepted by a large segment of the general public. The American writer Ayn Rand is perhaps the best 20th-century example of this type of author. Her version of egoism, as expounded in the novel Atlas Shrugged (1957) and in The Virtue of Selfishness (1965), a collection of essays, was a rather confusing mixture of appeals to self-interest and suggestions of the great benefits to society that would result from unfettered self-interested behaviour. Underlying this account was the tacit assumption that genuine self-interest cannot be served by lying, stealing, cheating, or other similarly antisocial conduct.

As this example illustrates, what starts out as a defense of universal ethical egoism very often turns into an indirect defense of consequentialism: the claim is that everyone will be better off if each person does what is in his own interest. The ethical egoist is virtually compelled to make this claim, because otherwise there is a paradox in the fact that he advocates ethical egoism at all. Such advocacy would be contrary to the very principle of ethical egoism, unless the egoist stands to benefit from others' becoming ethical egoists. If his interests are such that they would be threatened by others' pursuing their own interests, then he would do better to advocate altruism and to keep his belief in egoism a secret.

Unfortunately for ethical egoism, the claim that everyone will be better off if each person does what is in his own interests is incorrect. This is shown by thought experiments known as “prisoner's dilemmas,” which played an increasingly important role in discussions of ethical theory in the late 20th century (see game theory). The basic prisoner's dilemma is an imaginary situation in which two prisoners are accused of a crime. If one confesses and the other does not, the prisoner who confesses will be released immediately and the prisoner who does not will be jailed for 20 years. If neither confesses, each will be held for a few months and then released. And if both confess, each will be jailed for 15 years. It is further stipulated that the prisoners cannot communicate with each other. If each of them decides what to do purely on the basis of self-interest, he will realize that it is better for him to confess than not to confess, no matter what the other prisoner does. Paradoxically, when each prisoner acts selfishly—i.e., as an egoist—the result is that both are worse off than they would have been if each had acted cooperatively.

Although the example might seem bizarre, analogous situations occur quite frequently on a larger scale. Consider the dilemma of the commuter. Suppose that each commuter finds his private car a little more convenient than the bus, but when each commuter drives a car, the traffic becomes extremely congested. So everyone is better off in the situation where everyone takes the bus than in the situation where everyone drives a car. Because private cars are somewhat more convenient than buses, however, and because the overall volume of traffic is not appreciably affected by one more car on the road, it is in the interests of each commuter to continue driving. At least on the collective level, therefore, egoism is self-defeating—a conclusion well brought out by the English philosopher Derek Parfit in Reasons and Persons (1984).

The fact that ethical egoism is collectively self-defeating does not mean that it is wrong. An ethical egoist might still maintain that it is right for each person to pursue his own interests, even if this would bring about worse consequences for everyone. His position would not be self-contradictory, though it would be “self-effacing,” since it would require him to avoid promoting egoism in public and to keep his true ethical beliefs a secret.

Applied ethics

The most striking development in the study of ethics since the mid-1960s was the growth of interest among philosophers in practical, or applied, ethics—i.e., the application of normative ethical theories to practical problems. This is not, admittedly, a totally new departure. From Plato onward, moral philosophers have concerned themselves with practical questions, including suicide, the exposure of infants, the treatment of women, and the proper behaviour of public officials. Christian philosophers, notably Augustine