Abstract
The paper frames the issue of intergenerational justice by addressing an historical source and a theoretical difficulty. In relation to the historical point of view, the paper offers a preliminary re-reading of the Universal Declaration of Human Rights aimed at revealing the intergenerational commitment that lies behind it (§1). In addressing the second point, it presents the issue of intergenerational justice from a phenomenological perspective (§2). In developing such a perspective, the paper articulates a comprehensive ethical question that is constitutively related to any possible shaping of an intergenerational justice theory (§3). In turn, the explanation of that question presents the opportunity to propose a theory of motivation for the elaboration and implementation of policies explicitly aimed at fulfilling the intergenerational need, beyond any skepticism arising from pragmatic objections. Finally, the paper proposes to address this need by presenting a model of obligation ranking in which the flexibility and strength of the normative bond for the present generation and future ones are considered (§4).