In chapter 4, Baggett and Walls focus specifically on intrinsic human value. Historically, religious perspectives played a role in forming convictions about human rights. On the Judeo-Christian view, human beings are not only creatures of God, but are made in the image of God. Nicholas Wolterstorff claims that there is no plausible alternative to this religious framework to ground natural human rights. For example, some ground human rights in capacities like the power of reason, but this ends up excluding infants and those with mental disabilities who are often thought of as also having the same rights. Baggett and Walls do not want to say that respect-for-persons is supportable only on religious grounds. They make a more modest claim that respect-for-persons is best explained by theism compared to competing theories.
First they consider egoism. Kai Nielsen's proposal is that a respect-for-persons may be derivable from egoism (the view that one ought to act in one's own self-interest). Based on this, he thinks that one ought to treat others well in order to be treated well himself. The first problem is that this fails to account for the moral standing of others; it is just a strategy to be treated well. As Baggett and Walls put it, "What does my acting in my interest have to do with you possessing intrinsic worth?" A second problem is that this fails to account for cases where not respecting others does not affect one's self-interests. For example, one may be powerful and need not fear repercussions for treating people poorly. This results in having no reason for respecting others since it does not affect one's self-interests. Hence egoism by itself cannot account for intrinsic human value.
Next, they consider utilitarianism/consequentialism. On this view, one ought to maximize utility. For example, some utilitarians say that one ought to maximize pleasure and minimize pain. Jeremy Bentham, a proponent of utilitarianism, infamously said that the notion of intrinsic natural rights is nonsensical. Rights exist based on what is advantageous to society. Whether rights are protected or not is determined by social utility.
John Stuart Mill, another proponent of utilitarianism, likewise thinks that the sole reason for according rights to people is based on social utility. As Mark Linville notes, there is no necessary connection between an action's maximizing utility and its being fair or just. On utilitarianism, in a case where someone is raped, the wrongness of rape is not because their right is violated, but is because of the generally injurious consequences for the community. So utilitarianism fails to safeguard individual human dignity and worth.
Utilitarians offer many responses. One reply is that we tend to be unreliable calculators of consequences, so it is better to always safeguard individual rights than not to. Still, the problem persists that no individual's rights or dignity is beyond sacrificing if, by doing so, utility is maximized. A rule-utilitarian may say that one should follow the rules which maximizes utility. But still, this is far from saying that certain acts are categorically wrong. All that can be said regarding an act is that it is at most merely consequentially wrong. Angus Menuge has said that on utilitarianism, if a tyrant was more effective in brainwashing people or slaughtering those who disagreed, genocide would have been right. Hence utilitarianism has problems accounting for human value.
Next, Baggett and Walls consider Philippa Foot's virtue ethics that is based on a natural law theory. Foot's book called Natural Goodness is an account of virtues based on how human beings are normatively structured, how we typically behave when it comes to those teleological aspects of our human functioning. Her book has three distinct parts. First is her argument against non-cognitivism (the view that moral statements do not express propositions that can be true or false). Second is her defense of naturalistic moral objectivity. Last, she handles objections from utilitarians and from Nietzschian nihilists.
Baggett and Walls focus on the second section. Foot argues that we make judgments of goodness and defect of living things by reference to a teleological account of the life form based on its species. Her account covers evaluative judgments of the characteristics and operations of other living things. What an animal should do depends on the kind of animal it is. Likewise, what we (humans) should do depends on our being humans. This means that moral defect is really just a form of natural defect. Vice is a form of natural defect while virtue is a form of natural goodness, rooted in patterns of natural normativity. Based on the kind of species one is, some behaviors simply conduce better to one's flourishing than others.
Take for example the virtue of promise keeping. In giving a promise one makes use of a special kind of tool invented by humans for the better conduct of their lives, creating an obligation that contains in its nature a prescription that harmlessness in neglecting does not annul. Some accuse her account of being utilitarian. She however says that utilitarianism (and other forms of consequentialism) has its foundation in a proposition linking goodness of action to the goodness of state of affairs. Her theory of natural normativity has no such foundational proposition.
While Baggett and Walls agree with many aspects of Foot's work, such as moral cognitivism and moral realism, they have some significant reservations with her main account. The most significant is that her account does not answer whether human flourishing is of intrinsic value. While she affirms it, her account does not provide a foundation for it. First, Foot has to account for differences between pestilential creatures, animals, and human beings. If she wants to say that biologically adaptive patterns of behavior in cancer cells or tigers do not entail objective moral facts, then how does she go from natural normativity to objective morality in the case of human beings?
Second, there is a problem of smart free riders. Why should one keep their promise if no damage is done? Foot says that there is still a moral duty to keep it to cultivate the sort of character of being trustworthy. But her reply still cannot account for a really smart promise breaker who is able and willing to get over her aversion to breaking promises when doing so is unlikely to detract from optimal species-flourishing.
Third is the problem of a deflationary analysis. Foot's account is characterized as neo-Aristotelian, but Aristotle's worldview was far from naturalistic. While Aristotle placed great emphasize on being human, his view wasn't content with our being merely human.
Fourth is a transition problem. While she affirms good and noble human characteristics, she departs from a naturalistic, biologically grounded account of moral virtues. Furthermore, by limiting her resources to human flourishing, it seems unlikely she will have enough for the sort of thick account that virtue approaches to ethics tend to have as their distinctive strength.
Fifth, Baggett and Walls raise a normativity challenge. While they agree she is right, in one sense, to say that morality depends on our natures, this still leaves out an analysis of what that nature is exactly. Talk of telos (purpose) and human nature in a Godless world is difficult to sustain. Foot thinks that the designs of a Divine Mind are irrelevant to the natural-teleological descriptions of human beings. But if we have been created by God in His image, with his intentions in mind, then this is a relevant consideration.
Sixth is an epistemic challenge. Foot's work does not address the contemporary challenge (in regards to moral knowledge) posed by evolutionary moral psychology.