1. Are there right and wrong answers to moral questions?
Morality must relate, at some level, to the well-being of conscious creatures. If there are more and less effective ways for us to seek happiness and to avoid misery in this world—and there clearly are—then there are right and wrong answers to questions of morality.
2. Are you saying that science can answer such questions?
Yes, in principle. Human well-being is not a random phenomenon. It depends on many factors—ranging from genetics and neurobiology to sociology and economics. But, clearly, there are scientific truths to be known about how we can flourish in this world. Wherever we can have an impact on the well-being of others, questions of morality apply.
3. But can’t moral claims be in conflict? Aren’t there many situations in which one person’s happiness means another’s suffering?
There are some circumstances like this, and we call these contests “zero-sum.” Generally speaking, however, the most important moral occasions are not like this. If we could eliminate war, nuclear proliferation, malaria, chronic hunger, child abuse, etc.—these changes would be good, on balance, for everyone. There are surely neurobiological, psychological, and sociological reasons why this is so—which is to say that science could potentially tell us exactly why a phenomenon like child abuse diminishes human well-being.
But we don’t have to wait for science to do this. We already have very good reasons to believe that mistreating children is bad for everyone. I think it is important for us to admit that this is not a claim about our personal preferences, or merely something our culture has conditioned us to believe. It is a claim about the architecture of our minds and the social architecture of our world. Moral truths of this kind must find their place in any scientific understanding of human experience.
4. What if some people simply have different notions about what is truly important in life? How could science tell us that the actions of the Taliban are in fact immoral, when the Taliban think they are behaving morally?
As I discuss in my book, there may be different ways for people to thrive, but there are clearly many more ways for them not to thrive. The Taliban are a perfect example of a group of people who are struggling to build a society that is obviously less good than many of the other societies on offer. Afghan women have a 12% literacy rate and a life expectancy of 44 years. Afghanistan has nearly the highest maternal and infant mortality rates in the world. It also has one of the highest birthrates. Consequently, it is one of the best places on earth to watch women and infants die. And Afghanistan’s GDP is currently lower than the world’s average was in the year 1820. It is safe to say that the optimal response to this dire situation—that is to say, the most moral response—is not to throw battery acid in the faces of little girls for the crime of learning to read. This may seem like common sense to us—and it is—but I am saying that it is also, at bottom, a claim about biology, psychology, sociology, and economics. It is not, therefore, unscientific to say that the Taliban are wrong about morality. In fact, we must say this, the moment we admit that we know anything at all about human well-being.
