Abstract

This chapter concentrates on Peter Olivi’s (ca. 1248–98) theory of the ontological foundations of political power—and, by extension, property and other social institutions. After briefly presenting his view of political power as a relation between a ruler and his subjects (which he presents in his famous Quid ponat ius), the chapter focuses more generally on Olivi’s theory of relations. Drawing from previous works by Alain Boureau, Sylvain Piron, Christian Rode, Robert Pasnau and others, it explores the ontology of relations and endeavors to shed new light on this notoriously difficult aspect of Olivi’s philosophy. A special focus is placed on the non-Aristotelian notion of rationes reales, which Olivi uses to make room between realism and nominalism, as he argues that power relations are real (i.e. they are not mind-dependent) although they are not based on any real properties in the relata. After showing that political power and other institutional facts must be understood in light of this peculiar ontological notion, the final section of the essay argues that the freedom of the human will entails an ability to change social reality. It is also suggested that despite this rather modern aspect of Olivi’s his social ontology, he remains firmly within medieval worldview by grounding the normative aspect of social institutions in the will of God.