Riviste / Discipline Filosofiche / Ontologie fenomenologiche: individualità, essenza, idea / Idea ed essenza nello sviluppo dell’ontologia di Roman Ingarden

The purpose of the paper is to describe Roman Ingarden’s detailed study of essence and idea, in terms of their relation to individual objects. This study, which plays a central role in the context of Ingarden’s ontology, is carried out both in Essential Questions (Ingarden’s habilitation thesis published in 1925) and in the second volume of Controversy over the Existence of the World. What emerges from the comparison of these works is a complex ontological structure in which Jean Hering’s considerations on the same subject matter, published in Husserl’s “Jahrbuch” in 1921, are maintained and at the same time developed.