When we stand to affect another person or animal, at least four moral considerations seem potentially relevant:

1. The creature’s suffering or distress versus its happiness, contentment, or satisfaction.
2. The creature’s sense of meaning, purpose, and agency.
3. The creature’s ability to live in its natural way or to be itself. And …
4. The impact on other creatures that know and care about the creature that we are directly affecting.

The first consideration is relevant to all sentient beings in proportion to their capacity for sensation and experience. Perhaps a clam cannot suffer appreciably. But there is no reason to think that we human beings are the most sensitive of all creatures–or at least, not by much. And since the first consideration applies to most other animals, it is wrong to reduce their happiness or increase their suffering.

A more difficult question is whether a sudden and painless death reduces happiness. On one account, the net of a creature’s happiness accumulates like a running tally over the life-course. In that case, a painless death freezes the score permanently in place, which can make the total higher than it would have been if the future would have been less happy than the past was. A different views is that a creature has no happiness or suffering at all after death, and therefore death has no impact on happiness. In Epicurus’ phrase, “Death is nothing to us.” I am dissatisfied with both views but not sure that I have a better proposal. Certainly, happiness has a temporal aspect, because suffering on one day lingers on the next. But I struggle to say what impact ending a life has on the creature’s happiness.

The second consideration depends on an ability to make meaning or sense of one’s life and to make consequential choices according to one’s sense of purpose: in a word, “agency.” I am not committed to the premise that agency is a capacity of human beings alone, but we certainly have a very advanced version of it. Note that this capacity is temporal: we make meaning by putting our present state and our current choices in a longer narrative that includes a past and a future. One reason that killing a human being is badly wrong is that it ends the narrative that the person is constructing and thereby destroys her agency. I don’t think the same argument applies to the instantaneous and painless termination of the life of a chicken.

The third consideration–naturalness–seems to apply most to creatures that are not human beings. If possible, a bear should be left alone to live as a bear. Our family dog would not be better off if he were left in the woods to fend for himself like coyote, but he should be able to live the life natural to a domesticated dog, with activities like walks and cuddles. And as for a cow–I am inclined to think that its natural state must include time grazing in a field and nursing a calf. I am not sure that suddenly being slaughtered violates its ability to live a natural life. That means that factory farming is unacceptable but family farming may be consistent with respecting the natural states of farm animals.

As for human beings, we are also natural creatures in the sense that we are an evolved species with many innate limitations and tendencies. But we are capable of reflecting on the whole range of our inherited traits and distinguish the better from the worse. We have a natural proclivity to altruism but also to aggression, even to rape and murder. For us to live according to nature is not nearly good enough. We build institutions and norms to change our inherited natures for the better. That forfeits a right to live naturally and makes the third consideration irrelevant to us.

The fourth consideration applies to any animal that cares for another. In the old Disney cartoon, the death of Bambi’s mother deeply hurt Bambi. Although the cartoon anthropomorphized its animal characters, Bambi’s emotional reaction seems plausible enough for a deer. Still, people may be unique in that our relationships with other people are mediated by language and other forms of communication. We can suffer–or have our sense of purpose and agency frustrated–by learning of the death of someone we have never even met. In contrast, if Bambi had not directly experienced his mother’s death, he wouldn’t have suffered from it.

Freedom is certainly a moral consideration as well, but for human beings, it has a lot to do with #2 (purpose and agency), whereas for animals, it is related to #4 (naturalness). For a person, to be free is to be able to live according to her own sense of purpose. But a bear is free if it’s left alone to be a bear.

What all this means: Intentionally causing the suffering of another creature is always wrong, albeit a wrong that should be balanced against other considerations. Reducing the ability of a non-human creature to live naturally is also a wrong, at least ceteris paribus. But that is a complex question when it comes to farm animals. Killing a person is a special evil because it not only causes suffering but it ruins the purpose and agency that came from that person’s ability to plan and foresee the future. Furthermore, the impact on other human beings of killing a given person is particularly deep and widespread. This is one reason that it is badly wrong to kill even a human being who does not have much agency, such as a neonate. Killing an advanced animal painlessly and suddenly (beyond the sight of its kin) does not necessarily violate considerations #3 or #4. It may violate #1, depending on how we understand the temporal dimension of happiness and suffering. And it may violate #2, but only to the degree that other advanced species have capacities for long-term planning.

See also my evolving thoughts on animal rights and welfare.

Beliefs about “is” and “ought” are so deeply interrelated that it is often better to think of truth and rightness as two dimensions of the same thought than as separable concepts.* That means that it is almost always important to analyze whether a moral belief you hold is true (as opposed to false or uncertain) and also whether any factual claim you make is good (as opposed to bad or unethical).

Consider these examples:

1. “It is wrong to discriminate on the basis of race.” That sounds like a pure value-judgment. It may be an excellent or even an obligatory value judgment, but it doesn’t sound like a truth, like “2 plus 3 equal 5,” or “Lincoln issued the Emancipation Proclamation.”

However, someone who believes this statement and takes it seriously almost certainly holds a set of other beliefs that are factual. For instance: There has been, and continues to be, a lot of discrimination on the basis of race. Racial discrimination has caused (and seems likely to continue to cause) suffering, injustice, and pain. And people of different races are not actually different in ways that should matter. These statements are true and based on information.

So now the claim is starting to look very factual again. It’s starting to sound like a testable hypothesis that isn’t a matter of moral judgment. But the stance against racial discrimination is also inextricably moral, at several levels.

First, it isn’t a logical or scientific fact that it it wrong to cause suffering, injustice, or pain. when animals cause pain, we don’t blame them morally. Implicit in the idea that we should not discriminate is some account of how we should behave toward other human beings.

Second, how do we know that racial discrimination has been common? People have experienced it personally and have taken the trouble to share their own experiences with others who have chosen to listen to them; or they have collected evidence of other people’s suffering from libraries and archives. In other words, people have accumulated and shared an understanding of racial oppression in the United States. That process takes intentional effort. Whether you are a professional historian who uncovers original documents about slavery or a parent who shares family memories with your toddlers, you are creating knowledge because of your moral commitments.

So now the statement “It is wrong to discriminate on the basis of race” is again beginning to seem highly moral and not factual at all. It is built on moral concepts like “injustice,” and an understanding of our history and present circumstances that we have created because of our values. But again, we cannot ignore the factual element. Yes, people create an understanding of history. But they cannot make just anything up. Racial discrimination has been all too real. That is why it appears in books of history and not just in fiction. We make the books of history, but it is “history” because it is real.

To add another layer: race itself is not a scientific concept. No biologist from another planet would classify human beings into races. But race is a social construct of enormous power. As such, it has really existed, and its existence has mostly been bad, although certainly some have made good of it through their effort and their art.

In short, a statement against racism, like very many other statements, combines evaluations and facts in ways that are impossible fully to disentangle. And so one question that you can ask about a statement like this is: “Is it true?”

2. Every child has a right to a good education. The invocation of a right in this sentence makes it a moral claim. Rights cannot be detected or vindicated by scientific methods. To say that someone has a right is to assert what is just, fair, or good.

At the same time, education is something that we observe and experience. Although education occurs in many settings (beginning with the home), usually a right to education is interpreted as a right to free or affordable schooling of a certain quality. Schools and colleges were founded at particular points in human history and have evolved and diversified until they reflect a range of purposes, as well as a wide range of quality. It only makes sense to favor a right to education (translated as a right to a certain quality and extent of schooling) if one observes that schools are, or could be, good for children.

That is partly an empirical claim, informed by evidence about their actual impact. But it is not a purely empirical assertion, because what is good for children is a moral question. (Should children become free and autonomous? Obedient and productive? Smart? Happy?)

Moral judgment enters the analysis in another way as well. To say, “Every child has a right to a good education” does not imply that a satisfactory education is what we actually offer in schools today. We can develop a vision of better schools in the future. But that vision should be vivid and detailed, not just a rote invocation of a better time. And it should be a plausible vision, given what we know (or think we know) about how human beings learn, about how institutions function, about what laws can achieve, and about what money can buy.

Once again, the factual and the moral interpenetrate deeply, so that teasing one strand from the other does not seem productive, even if it were possible.

3. “A good and omnipotent God exists”: This is a claim about how the universe actually is. It is phrased so that it is literally true or false, just like the claim that 2 plus 3 equals five or the earth is round. But God is different. God could exist and yet be completely immune from being empirically proven by living human beings during the regular course of history. (Only souls after death or at the end of time would have direct empirical evidence of God.)

I think people are entitled to believe in God if that genuinely feels true to them. I would not advocate deleting that belief from one’s set of ideas because it isn’t a scientific hypotheses, subject to being tested. But you can ask whether your own religious beliefs feel secure and sincere. The question is whether you really believe in God. That is a different question from whether you wish that God exists or whether you belong to a community that traditionally believes in God. Nothing is true just because it would be better if it were true or just because people have believed it.

Again, this is not an argument against the existence of God. It is merely a reminder that one is responsible for reflecting on the truth of one’s religious beliefs, quite apart from their consequences. God belongs in your store of beliefs if subjective experience or reason leads you to believe that there is a God. If not, perhaps that idea should go.

4. “Everything happens for a good reason.” That statement could be true if God or Providence or some other supernatural force makes everything come out well, either on earth or in heaven. In other words, this statement could be true if it is connected to a religious claim that is true. But the statement seems flatly false if it is not sustained in that way. UNICEF estimates that 21 children under the age of five die every minute because of preventable causes, most of which could be removed with modest amounts of money. If those children die for a good reason, I fail to see it. To believe that everything happens for the best without citing a religious justification seems to me a classic example of bad faith. It is an error, a falsehood, motivated by the hope of evading upsetting thoughts. It is an example of the kind of belief that we should delete as we look for falsehoods in our own beliefs (unless, again, you choose to retain it because of a religious belief that truly justifies it).

*Cf. Bernard Williams on “thick” moral concepts in Ethics and the Limits of Philosophy, pp. 140-1.