In historical terms, there was every reason to expect that such a policy of prohibition would fail. It is well known, for instance, that the experiment with the prohibition of alcohol in the United States did little more than precipitate a terrible comedy of increased drinking, organized crime, and police corruption. What is not generally remembered is that Prohibition was an explicitly religious exercise, being the joint product of the Woman's Christian Temperance Union and the pious lobbying of certain Protestant missionary societies.

  The problem with the prohibition of any desirable commodity is money. The United Nations values the drug trade at $400 billion a year. This exceeds the annual budget for the U.S. Department of Defense. If this figure is correct, the trade in illegal drugs constitutes 8 percent of all international commerce (while the sale of textiles makes up 7.5 percent and motor vehicles just 5.3 percent).35 And yet, prohibition itself is what makes the manufacture and sale of drugs so extraordinarily profitable. Those who earn their living in this way enjoy a 5,000 to 20,000 percent return on their investment, tax-free. Every relevant indicator of the drug trade-rates of drug use and interdiction, estimates of production, the purity of drugs on the street, etc.-shows that the government can do nothing to stop it as long as such profits exist (indeed, these profits are highly corrupting of law enforcement in any case). The crimes of the addict, to finance the stratospheric cost of his lifestyle, and the crimes of the dealer, to protect both his territory and his goods, are likewise the results of prohibition.36 A final irony, which seems good enough to be the work of Satan himself, is that the market we have created by our drug laws has become a steady source of revenue for terrorist organizations like Al Qaeda, Islamic Jihad, Hezbollah, Shining Path, and others.37

  Even if we acknowledge that stopping drug use is a justifiable social goal, how does the financial cost of our war on drugs appear in light of the other challenges we face? Consider that it would require only a onetime expenditure of $2 billion to secure our commercial seaports against smuggled nuclear weapons. At present we have allocated a mere $93 million for this purpose.38 How will our prohibition of marijuana use look (this comes at a cost of $4 billion annually) if a new sun ever dawns over the port of Los Angeles? Or consider that the U.S. government can afford to spend only $2.3 billion each year on the reconstruction of Afghanistan. The Taliban and Al Qaeda are now regrouping. Warlords rule the countryside beyond the city limits of Kabul. Which is more important to us, reclaiming this part of the world for the forces of civilization or keeping cancer patients in Berkeley from relieving their nausea with marijuana? Our present use of government funds suggests an uncanny skewing-we might even say derangement-of our national priorities. Such a bizarre allocation of resources is sure to keep Afghanistan in ruins for many years to come. It will also leave Afghan farmers with no alternative but to grow opium. Happily for them, our drug laws still render this a highly profitable enterprise.39

  Anyone who believes that God is watching us from beyond the stars will feel that punishing peaceful men and women for their private pleasure is perfectly reasonable. We are now in the twenty-first century. Perhaps we should have better reasons for depriving our neighbors of their liberty at gunpoint. Given the magnitude of the real problems that confront us-terrorism, nuclear proliferation, the spread of infectious disease, failing infrastructure, lack of adequate funds for education and health care, etc.-our war on sin is so outrageously unwise as to almost defy rational comment. How have we grown so blind to our deeper interests? And how have we managed to enact such policies with so little substantive debate?

  The God of Medicine

  While there is surely an opposition between reason and faith, we will see that there is none between reason and love or reason and spirituality. The basis for this claim is simple. Every experience that a human being can have admits of rational discussion about its causes and consequences (or about our ignorance thereof). Although this leaves considerable room for the exotic, it leaves none at all for faith. There may yet be good reasons to believe in psychic phenomena, alien life, the doctrine of rebirth, the healing power of prayer, or anything else- but our credulity must scale with the evidence. The doctrine of faith denies this. From the perspective of faith, it is better to ape the behavior of one's ancestors than to find creative ways to uncover new truths in the present.

  There are sources of irrationality other than religious faith, of course, but none of them are celebrated for their role in shaping public policy. Supreme Court justices are not in the habit of praising our nation for its reliance upon astrology, or for its wealth of UFO sightings, or for exemplifying the various reasoning biases that psychologists have found to be more or less endemic to our species.40 Only mainstream religious dogmatism receives the unqualified support of government. And yet, religious faith obscures uncertainty where uncertainty manifestly exists, allowing the unknown, the implausible, and the patently false to achieve primacy over the facts.

  Consider the present debate over research on human embryonic stem cells. The problem with this research, from the religious point of view, is simple: it entails the destruction of human embryos. The embryos in question will have been cultured in vitro (not removed from a woman's body) and permitted to grow for three to five days. At this stage of development, an embryo is called a blastocyst and consists of about 150 cells arranged in a microscopic sphere. Interior to the blastocyst is a small group of about 30 embryonic stem cells. These cells have two properties that make them of such abiding interest to scientists: as stem cells, they can remain in an unspecialized state, reproducing themselves through cell division for long periods of time (a population of such cells living in culture is known as a cell line); stem cells are also pluripotent, which means they have the potential to become any specialized cell in the human body- neurons of the brain and spinal cord, insulin-producing cells of the pancreas, muscle cells of the heart, and so forth.

  Here is what we know. We know that much can be learned from research on embryonic stem cells. In particular, such research may give us further insight into the processes of cell division and cell differentiation. This would almost certainly shed new light on those medical conditions, like cancer and birth defects, that seem to be merely a matter of these processes gone awry. We also know that research on embryonic stem cells requires the destruction of human embryos at the 150-cell stage. There is not the slightest reason to believe, however, that such embryos have the capacity to sense pain, to suffer, or to experience the loss of life in any way at all. What is indisputable is that there are millions of human beings who do have these capacities, and who currently suffer from traumatic injuries to the brain and spinal cord. Millions more suffer from Parkinson's and Alzheimer's diseases. Millions more suffer from stroke and heart disease, from burns, from diabetes, from rheumatoid arthritis, from Purkinje cell degeneration, from Duchenne muscular dystrophy, and from vision and hearing loss. We know that embryonic stem cells promise to be a renewable source of tissues and organs that might alleviate such suffering in the not too distant future.

  Enter faith: we now find ourselves living in a world in which college-educated politicians will hurl impediments in the way of such research because they are concerned about the fate of single cells. Their concern is not merely that a collection of 150 cells may suffer its destruction. Rather, they believe that even a human zygote (a fertilized egg) should be accorded all the protections of a fully developed human being. Such a cell, after all, has the potential to become a fully developed human being. But given our recent advances in the biology of cloning, as much can be said of almost every cell in the human body. By the measure of a cell's potential, whenever the president scratches his nose he is now engaged in a diabolical culling of souls.

  Out of deference to some rather poorly specified tenets of Christian doctrine (after all, nothing in the Bible suggests that killing human embryos, or even human fetuses, is the equivalent of killing a human being), the U.S. House of Representatives voted effectively
to ban embryonic stem-cell research on February 27, 2003.

  No rational approach to ethics would have led us to such an impasse. Our present policy on human stem cells has been shaped by beliefs that are divorced from every reasonable intuition we might form about the possible experience of living systems. In neurological terms, we surely visit more suffering upon this earth by killing a fly than by killing a human blastocyst, to say nothing of a human zygote (flies, after all, have 100,000 cells in their brains alone). Of course, the point at which we fully acquire our humanity, and our capacity to suffer, remains an open question. But anyone who would dogmatically insist that these traits must arise coincident with the moment of conception has nothing to contribute, apart from his ignorance, to this debate. Those opposed to therapeutic stem-cell research on religious grounds constitute the biological and ethical equivalent of a flat-earth society. Our discourse on the subject should reflect this. In this area of public policy alone, the accommodations that we have made to faith will do nothing but enshrine a perfect immensity of human suffering for decades to come.

  But the tendrils of unreason creep further. President Bush recently decided to cut off funding to any overseas family-planning group that provides information on abortion. According to the New York Times, this "has effectively stopped condom provision to 16 countries and reduced it in 13 others, including some with the world's highest rates of AIDS infection."41 Under the influence of Christian notions of the sinfulness of sex outside of marriage, the U.S. government has required that one-third of its AIDS prevention funds allocated to Africa be squandered on teaching abstinence rather than condom use. It is no exaggeration to say that millions could die as a direct result of this single efflorescence of religious dogmatism. As Nicholas Kristof points out, "sex kills, and so does this kind of blushing prudishness."42

  And yet, even those who see the problem in all its horror find it impossible to criticize faith itself. Take Kristof as an example: in the very act of exposing the medievalism that prevails in the U.S. government, and its likely consequences abroad, he goes on to chastise anyone who would demand that the faithful be held fully accountable for their beliefs:

  I tend to disagree with evangelicals on almost everything, and I see no problem with aggressively pointing out the dismal consequences of this increasing religious influence. For example, evangelicals' discomfort with condoms and sex education has led the administration to policies that are likely to lead to more people dying of AIDS at home and abroad, not to mention more pregnancies and abortions.

  But liberal critiques sometimes seem not just filled with outrage at evangelical-backed policies, which is fair, but also to have a sneering tone about conservative Christianity itself. Such mockery of religious faith is inexcusable. And liberals sometimes show more intellectual curiosity about the religion of Afghanistan than that of Alabama, and more interest in reading the Upanishads than in reading the Book of Revelation.43

  This is reason in ruins. Kristof condemns the "dismal consequences" of faith while honoring their cause.44 It is true that the rules of civil discourse currently demand that Reason wear a veil whenever she ventures out in public. But the rules of civil discourse must change. Faith drives a wedge between ethics and suffering. Where certain actions cause no suffering at all, religious dogmatists still maintain that they are evil and worthy of punishment (sodomy, marijuana use, homosexuality, the killing of blastocysts, etc.). And yet, where suffering and death are found in abundance their causes are often deemed to be good (withholding funds for family planning in the third world, prosecuting nonviolent drug offenders, preventing stem-cell research, etc). This inversion of priorities not only victimizes innocent people and squanders scarce resources; it completely falsifies our ethics. It is time we found a more reasonable approach to answering questions of right and wrong.

  A Science of Good and Evil

  Is the difference between good and evil just a matter of what any particular group of human beings says it is? Consider that one of the greatest sources of amusement in sixteenth-century Paris was cat burning. At the midsummer's fair an impresario would gather dozens of cats in a net, hoist them high into the air from a special stage, and then, to everyone's delight, lower the whole writhing bundle onto a bonfire. The assembled spectators "shrieked with laughter as the animals, howling with pain, were singed, roasted, and finally carbonized."1 Most of us would recoil from such a spectacle today. But would we be right to do so? Can we say that there are ethical truths of which all avid torturers of cats are ignorant?

  Many people appear to believe that ethical truths are culturally contingent in a way that scientific truths are not. Indeed, this loss of purchase upon ethical truth seems to be one of the principal shortcomings of secularism. The problem is that once we abandon our belief in a rule-making God, the question of why a given action is good or bad becomes a matter of debate. And a statement like "Murder is wrong," while being uncontroversial in most circles, has never seemed anchored to the facts of this world in the way that statements about planets or molecules appear to be. The problem, in philosophical terms, has been one of characterizing just what sort of "facts" our moral intuitions can be said to track-if, indeed, they track anything of the kind.

  A rational approach to ethics becomes possible once we realize that questions of right and wrong are really questions about the happiness and suffering of sentient creatures. If we are in a position to affect the happiness or suffering of others, we have ethical responsibilities toward them2-and many of these responsibilities are so grave as to become matters of civil and criminal law. Taking happiness and suffering as our starting point, we can see that much of what people worry about under the guise of morality has nothing to do with the subject. It is time we realized that crimes without victims are like debts without creditors. They do not even exist.3 Any person who lies awake at night worrying about the private pleasures of other consenting adults has more than just too much time on his hands; he has some unjustifiable beliefs about the nature of right and wrong.

  The fact that people of different times and cultures disagree about ethical questions should not trouble us. It suggests nothing at all about the status of moral truth. Imagine what it would be like to consult the finest thinkers of antiquity on questions of basic science: "What," we might ask, "is fire? And how do living systems reproduce themselves? And what are the various lights we see in the night sky?" We would surely encounter a bewildering lack of consensus on these matters. Even though there was no shortage of brilliant minds in the ancient world, they simply lacked the physical and conceptual tools to answer questions of this sort. Their lack of consensus signified their ignorance of certain physical truths, not that no such truths exist.

  If there are right and wrong answers to ethical questions, these answers will be best sought in the living present. Whether our search takes us to a secluded cave or to a modern laboratory makes no difference to the existence of the facts in question. If ethics represents a genuine sphere of knowledge, it represents a sphere of potential progress (and regress). The relevance of tradition to this area of discourse, as to all others, will be as a support for present inquiry. Where our traditions are not supportive, they become mere vehicles of ignorance. The pervasive idea that religion is somehow the source of our deepest ethical intuitions is absurd. We no more get our sense that cruelty is wrong from the pages of the Bible than we get our sense that two plus two equals four from the pages of a textbook on mathematics. Anyone who does not harbor some rudimentary sense that cruelty is wrong is unlikely to learn that it is by reading-and, indeed, most scripture offers rather equivocal testimony to this fact in any case. Our ethical intuitions must have their precursors in the natural world, for while nature is indeed red in tooth and claw, it is not merely so. Even monkeys will undergo extraordinary privations to avoid causing harm to another member of their species.4 Concern for others was not the invention of any prophet.

  The fact that our ethical intuitions have their roots in bi
ology reveals that our efforts to ground ethics in religious conceptions of "moral duty" are misguided. Saving a drowning child is no more a moral duty than understanding a syllogism is a logical one. We simply do not need religious ideas to motivate us to live ethical lives. Once we begin thinking seriously about happiness and suffering, we find that our religious traditions are no more reliable on questions of ethics than they have been on scientific questions generally.

  The anthropocentrism that is intrinsic to every faith cannot help appearing impossibly quaint-and therefore impossible -given what we now know about the natural world. Biological truths are simply not commensurate with a designer God, or even a good one. The perverse wonder of evolution is this: the very mechanisms that create the incredible beauty and diversity of the living world guarantee monstrosity and death. The child born without limbs, the sightless fly, the vanished species-these are nothing less than Mother Nature caught in the act of throwing her clay. No perfect God could maintain such incongruities. It is worth remembering that if God created the world and all things in it, he created smallpox, plague, and filariasis. Any person who intentionally loosed such horrors upon the earth would be ground to dust for his crimes.

  The deity who stalked the deserts of the Middle East millennia ago-and who seems to have abandoned them to bloodshed in his name ever since-is no one to consult on questions of ethics. Indeed, to judge him on the basis of his works is a highly invidious undertaking. Bertrand Russell got here first: "Apart from logical cogency, there is to me something a little odd about the ethical valuations of those who think that an omnipotent, omniscient, and benevolent Deity, after preparing the ground by many millions of years of lifeless nebulae, would consider Himself adequately rewarded by the final emergence of Hitler and Stalin and the H bomb."5 This is a devastating observation, and there is no retort to it. In the face of God's obvious inadequacies, the pious have generally held that one cannot apply earthly norms to the Creator of the universe. This argument loses its force the moment we notice that the Creator who purports to be beyond human judgment is consistently ruled by human passions-jealousy, wrath, suspicion, and the lust to dominate. A close study of our holy books reveals that the God of Abraham is a ridiculous fellow-capricious, petulant, and cruel-and one with whom a covenant is little guarantee of health or happiness.6 If these are the characteristics of God, then the worst among us have been created far more in his image than we ever could have hoped.