Resumen de Is really David Lewis a realist?
Paradoxically, concerning the structure of the world, David Lewis endorses a very nominalistic point of view, whereas he approaches possible worlds from an extreme realistic position. The aim of the present paper is exactly to analyze the relation between the ontology of actual world and the possible worlds ontology in the case of David Lewis, and to see whether or not this tension between the two irreconcilable positions is based on an inner contradiction in his philosophy.
