Fernando A Riofrio

Multiplicity of Beings according to Saint Thomas Aquinas is a book that aimed to find an explanation of beings' diversity on the grounds of the metaphysical intrinsic principles of beings identified by Aristótle. Are matter and form causes of identity, individuation and diversity of substances? Aquinas answers this question by means of some demonstrations grounded on the very nature of matter and form, in the line of the doctrines contained in book 7 of the Aristotle's Metaphysics.

This article analyzes Aristotle's argument on form as the primary substance and principle in Metaphysics Zeta 17 from the point of departure of the sense-perceptible substances subject to the becoming.