Harsanyi defends utilitarianism by means of an axiomatic proof and by what he calls the 'equiprobability model'. Both justifications of utilitarianism aim to show that utilitarian ethics can be derived from Bayesian rationality and some weak moral constraints on the reasoning of rational agents. I argue that, from the perspective of Bayesian agents, one of these constraints, the impersonality constraint, is not weak at all if its meaning is made precise, and that generally, it even contradicts individual rational agency. Without (...) the impersonality constraint, Harsanyi's two justifications of utilitarianism on the grounds of Bayesian rationality fail. As an alternative, I develop a contractarian framework that is compatible with individual rational agency and Harsanyi's central assumptions, and that allows the derivation of moral conclusions on the grounds of Bayesian rationality. The developed framework offers a novel justification of contractarian ethics and may best be described as a combined version of Harsanyi's equiprobability model and Rawls's original position. (shrink)

This article considers whether any interpretation of the idea of equal claims to the natural world can resolve the Canyon Dilemma (i.e. can justify protecting the Grand Canyon but not a small canyon from mining by a poor generation). It first considers and ultimately rejects the idea of subjecting natural resource rights to an intergenerational equal division. It then demonstrates that a pluralist theory of environmental justice committed to both respect for the separateness of persons and to the collective good (...) can justify a type of intergenerational non-absolute equal division of natural resource rights that can navigate the Canyon Dilemma. (shrink)

This article considers the question of why labor income may be permissibly redistributed to the poor even though non-essential body parts should generally be protected from redistribution to the infirm – the body-income puzzle. It argues that proposed solutions that affirm self-ownership but reject ownership of labor income are unsuccessful. And proposed solutions that grant individuals entitlements to resources based on the centrality of those resources to the individual’s personal identity are also unsuccessful. Instead, this article defends a solution to (...) the body-income puzzle based on a novel conception of respect for the separateness of persons. This conception holds that the sphere of moral authority protected from interference by respect for the separateness of persons includes both the body and labor income. And the strength of the negative rights constituting this sphere vary based on these rights' importance to the personal identity of the right-holder. It is shown that a commitment to helping the disadvantaged tempered by this conception of respect for the separateness of persons can solve the body-income puzzle. (shrink)

Le présent essai soutient une position qui s’inscrit dans le courant dit « libertarien » tout en explorant les implications de la politique qui prône un revenu de base et suscite présentement un débat vivace à travers le monde, y compris au Japon. Il existe diverses formes d’éthique libertarienne. Ici, dans la lignée de Nozick, la « propriété de soi » et la clause lockéenne sont reconnus comme deux rouages essentiels de l’argumentation qui conduit à leur ajustement en vue d’une (...) éthique spécifique. Nous examinons comment Nozick défend la « propriété de soi » : son argumentation respecte la séparabilité des personnalités et elle accorde une grande importance à l’élaboration libre par chacun d’un mode de vie lui convenant. Une fois révisées la nature du droit dit « d’appropriation » et de la clause dite « lockéenne », nous réinterprétons cette position centrale des libertariens en considérant la position fondamentale de Nozick comme prenant appui sur une conception égalitariste de la notion de dispositions suffisantes. Les avantages de cette position sont dus non seulement à l’adéquation entre la théorie et un principe de distribution, mais encore à l’image de l’individu doté d’une propriété de soi réaffirmée, dans la vision libertarienne que Nozick déploie. Cette approche fournit les bases de la morale d’une activité libre exercée sur les marchés : ce point est essentiel pour les auteurs libertariens, qui refusent toute aliénation de la propriété privée et toute redistribution. Une version simplifiée du revenu de base une fois définie en l’adaptant à des cadres variés, dont le cadre japonais nous mène à conclure que le revenu de base, quoique séduisant, est partiellement conforme aux thèses libertariennes et qu’une version minimale serait à retenir. (shrink)

Libertarianism holds that agents initially fully own themselves and have moral powers to acquire property rights in external things under certain conditions. It is normally advocated as a theory of justice in the sense of the duties that we owe each other. So understood, it is silent about any impersonal duties (i.e., duties owed to no one) that we may have.

You and I lead different lives. While we share a society and a world, our existence is separate from one another. You and I matter individually, by ourselves. My dissertation is about this simple thought. I argue that this simple insight, the separateness of persons, tells us something fundamental about morality. My dissertation seeks to answer how the separateness of persons matters. I develop a precise view of the demands of the separateness of persons. The separateness of persons imposes both (...) a requirement on the justification of first-order moral principles as well as a requirement on the content of first-order moral principles. In specifying these demands, I argue that respecting the separateness of persons requires taking into consideration each person’s point of view separately. This requires taking into account the moral relations in which individuals stand to one another. I make use of this relational understanding of the separateness of persons to advance various debates in moral and political philosophy. I argue for a framework to assess to which extent the veil of ignorance can be reconciled with the separateness of persons. I also argue for a new view on the ethics of risk which is a form of contractualism that discounts risks only by their objective risk. Furthermore, I argue for a new solution to the problem of aggregation that is skeptical of aggregation and can set plausible limits to aggregation. Lastly, I provide a new relational agent-based justification for deontological constraints. In addition to answering how the separateness of persons matters, I defend the separateness of persons against challenges. Most importantly, I argue that the importance of the separateness of persons is not undermined even if we believe that our personal identity, i.e. whether we persist as the same person, is unimportant. (shrink)