Abstract

This papers tries to show at first that the dualism Plutarchus attributed in the De Iside et Osiride to most ancient thinkers, mainly «presocratics», has been largely influenced by the doxographical overview given by Aristotle at the beginning of the Metaphysics, which not only assumed that Empedocles was the first to introduce principles of Good and Evil, but also compared the theory of Anaxagoras to the alleged platonic dualism of the One and the Other. If dualities are quite present and important in some of the main theories of the so‑called presocratic philosophers, the question remains to determine in which cases these dualities can be compared to dualism in the sense this word has taken since Hyde. The second part of this article will thus consist to try to answer this question on the ground of three examples of thinkers for whom dualities played a crucial role : Alcmaeon, Parmenides and, chiefly, Empedocles, who had obviously linked Love and Strife to an axiological pattern in his Katharmoi.