The trolley problem, first described by Foot (1967) and Thomson (The Monist, 59, 204–217, 1976), is one of the most famous and influential thought experiments in deontological ethics. The general story is that a runaway trolley is threatening the lives of five people. Doing nothing will result in the death of those persons, but acting in order to save those persons would unavoidably result in the death of another, sixth person. It appears that, depending on the situation, we have different (...) moral judgments about the permissibility of action. We will review and systematize all the proposals in the literature of the past 35 years that have attempted to grasp our moral intuitions in a simple deontological principle. In particular, seventeen proposals will be classified: six algorithmic, seven psychological, and four other invalid accounts. This review and classification sheds light on some subtle differences and clarify a few issues. (shrink)

In his article ‘In Defense of Eating Meat’, Timothy Hsiao argued that sentience is not sufficient for moral status, that the pain experienced by an animal is bad but not morally bad, that the nutritional interests of humans trump the interests of animals and that eating meat is permissible. In this article I explore the strengths and weaknesses of Hsiao’s argument, clarify some issues and argue that eating meat is likely in conflict with some of our strongest moral intuitions.

Timothy Hsiao attempts to defend industrial animal farming by arguing that it is not inherently cruel. We raise three main objections to his defense. First, his argument rests on a misunderstanding of the nature of cruelty. Second, his conclusion, though technically true, is so weak as to be of virtually no moral significance or interest. Third, his contention that animals lack moral standing, and thus that mistreating them is wrong only insofar as it makes one more disposed to mistreat other (...) humans, is untenable on both philosophical and biological grounds. (shrink)

This article presents an argument for veganism, using a formal-axiomatic approach: a list of twenty axioms are explicitly stated. These axioms are all necessary conditions to derive the conclusion that veganism is a moral duty. The presented argument is a minimalist or core argument for veganism, because it is as parsimonious as possible, using the weakest conditions, the narrowest definitions, the most reliable empirical facts and the minimal assumptions necessary to reach the conclusion. If someone does not accept the conclusion, (...) logical consistency requires that s/he should be able to point at axiom on which s/he disagrees. The argument exposes hidden assumptions and provides a framework for an overview of the philosophical literature on animal rights and vegetarianism / veganism. (shrink)

In the last decade, the study of moral heuristics has gained in importance. I argue that we can consider speciesism as a moral heuristic: an intuitive rule of thumb that substitutes a target attribute (that is difficult to detect, e.g. “having rationality”) for a heuristic attribute (that is easier to detect, e.g. “looking like a human being”). This speciesism heuristic misfires when applied to some atypical humans such as the mentally disabled, giving them rights although they lack rationality. But I (...) argue that it is not necessarily irrational or inconsistent to hold on to this heuristic rule, because we have to take time and knowledge constraints, uncertainty aversion and emotional costs into account. However, this “heuristic defense” of speciesism uses a target attribute (rationality) that has implications of disrespect towards some atypical humans. Therefore, based on notions of impartiality and compassion, I argue for a morally better target attribute: sentience (“having a sense of well-being”). “Being a vertebrate” is suitable as a corresponding heuristic attribute because it is easy to detect and has a strong correlation with the target attribute of sentience. (shrink)

The mere means principle says it is impermissible to treat someone as merely a means to someone else’s ends. I specify this principle with two conditions: a victim is used as merely a means if the victim does not want the treatment by the agent and the agent wants the presence of the victim’s body. This principle is a specification of the doctrine of double effect which is compatible with moral intuitions and with a restricted kind of libertarianism. An extension (...) of this mere means principle, where not only using but also considering someone as merely a means is immoral, can explain and unify other deontological principles: doing versus allowing, partiality in imperfect duties of beneficence, and the asymmetry of procreational duties. A loop trolley dilemma is often presented as a counterexample of the mere means principle, but I argue that this dilemma generates a moral illusion, comparable to perceptual illusions. (shrink)

Classical utilitarianism is very demanding and entails some counter-intuitive implications in moral dilemmas such as the trolley problem in deontological ethics and the repugnant conclusion in population ethics. This article presents how one specific modification of utilitarianism can avoid these counter-intuitive implications. In this modified utilitarian theory, called ‘discounted’ or ‘mild’ utilitarianism, people have a right to discount the utilities of others, under the condition that people whose utility is discounted cannot validly complain against such discounting. A complaint made by (...) a utility discounted person is not valid if either the existence of the discounting people in that option is in a specific sense necessary or the existence of the discounted person is in a sense not necessary. According to mild utilitarianism, we should choose the option that maximizes the total validly discounted or complaint-free discounted utility, i e. the sum of everyone’s utility minus the complaint-free discounts. As there are two conditions that make a complaint invalid, this right to discount can be translated into two versions: the right to bodily autonomy and the right to procreation autonomy. The former right relates to the mere means principle in deontological ethics, the latter right is useful in avoiding the repugnant conclusion problem in population ethics. The possibility of democratically imposing an upper bound on the permissible amount of discounting is discussed. (shrink)

I propose a new fundamental principle in ethics: everyone who makes a choice has to avoid unwanted arbitrariness as much as possible. Unwanted arbitrariness is defi ned as making a choice without following a rule, whereby the consequences of that choice cannot be consistently wanted by at least one person. Other formulations of this anti-arbitrariness principle are given and compared with very similar contractualist principles formulated by Kant, Rawls, Scanlon and Parfit. The structure of arbitrariness allows us to fi nd (...) ways to avoid unwanted arbitrariness. The two most important implications of the anti-arbitrariness principle are discussed: non-dictatorship and non-discrimination. (shrink)

Is animal farming permissible when animals would have a positive welfare? The happy animal farming problem represent the paradigmatic problem in population ethics, because its simple structure introduces the most important complications of population ethics. Three new population ethical theories that avoid the counter-intuitive repugnant and sadistic conclusions are discussed and applied to the animal farming problem. Breeding farm animals would not be permissible according to these theories, except under some rather unrealistic conditions, such as those farm animals being so (...) happy that they themselves would prefer a continuation of animal farming. Given the fact that many people believe that most farm animals are not so happy and the fact that one can formulate reasonable population ethical theories that condemn happy animal farming, it can be concluded that it is better to avoid animal farming and the consumption of animal products in general. (shrink)

This article discusses the assumptions that are necessary to derive the conclusion that veganism - avoiding the use of animal products from conventional agriculture, hunting and fishing - is a moral duty. Using a formal-axiomatic framework, it is shown that twenty assumptions or axioms are sufficient to come to the conclusion. The argument is made as parsimonious as possible, using the weakest conditions, the most restrictive definitions and most reliable empirical facts. The argument assumes an antidiscrimination principle and a weak (...) basic right not to be used merely a means for someone else’s non-vital ends. It demonstrates that being a human is not morally relevant whereas sentience is a morally relevant criterion that meets the assumptions. If one does not agree with the conclusion that veganism is a moral duty, logical consistency requires that one must be able to indicate at least one axiom that one rejects. The argument makes hidden assumptions visible and provides a framework for a review of the philosophical literature about animal rights and vegetarianism/veganism. (shrink)

Just as one line appears to be longer than another in an optical illusion, we can have a spontaneous moral judgment that one individual is more important than another. Sometimes such judgments can lead to moral illusions like speciesism and other kinds of discrimination. Moral illusions are persistent spontaneous judgments that violate our deepest moral values and distract us away from a rational, authentic ethic. They generate pseudo-ethics, similar to pseudoscience. The antidote against moral illusions is the ethical principle to (...) avoid unwanted arbitrariness. Speciesism involves unwanted arbitrariness, and psychological research as well as the problem of wild animal suffering demonstrate that moral illusions such as speciesism can be very persistent. (shrink)

In this article I want to construct in a simple and systematic way an ethical theory of animal equality. The goal is a consistent theory, containing a set of clear and coherent universalized ethical principles that best fits our strongest moral intuitions in all possible morally relevant situations that we can think of, without too many arbitrary elements. I demonstrate that impartiality with a level of risk aversion and empathy with a need for efficiency are two different approaches that both (...) result in the same consequentialist principle of prioritarianism. Next, I discuss that this principle can be trumped by an ethic of care principle of tolerated partiality, and a deontological principle of basic right. These three principles represent different kinds of equality that can be applied to animal ethics. Finally, the predation problem leads to the introduction of a triple-N-principle that is related to the value of biodiversity. (shrink)