Abstract

In the Metaphysics, especially in Book X, are drawn the general lines of a henology. For the proper understanding of this doctrine it is necessary to reconstruct its argumentation from two fundamental basis: (1) the guide of puzzles or aporias that book III provides and (2) the ontological project announced in book IV where the relationship between ontology and henology is indicated. The fundamental feature of Aristotle's henology is that is a subordinate part of ontology. The role of henology is for Aristotle primarily destructive, that is, with this doctrine it is intended to establish the impossibility of considering the ‘one’ (τὸ ἓν) as a principle of the entities.