This article presents a proof of Arrow's Theorem which highlights the theorem's relationship to welfarism and which emphasizes its underlying geometric structure. In addition, this method of proof is adapted to provide a proof of a single-preference-profile version of Arrow's Theorem. The...

This paper reviews the welfarist approach to population ethics. We provide an overview of the critical-level utilitarian population principles and their generalized counterparts, examine important properties of these principles and discuss their relationships to other variable-population...

Intertemporal social-evaluation rules provide us with social criteria that can be used to assess the relative desirability of utility distributions across generations. The trade-offs between the well-being of different generations implicit in each such rule reflect the underlying ethical...

L'article examine les conditions qui permettent de satisfaire simultanément les versions ex ante et ex post du principe de Pareto, lorsqu'on cesse d'imposer l'hypothèse de l'utilité espérée aux préférences individuelles et sociales. Avec des probabilités subjectives qui peuvent varier,...