Purpose and existence of God. A systematic analysis of st. Thomas’ fifth way

The aim of this article is the purpose in nature as a way of access to philosophical knowledge of the existence of God, based on St. Thomas’s fifth way. This is known as “teleological argument”, whose interest is that it still concerns both ancient and modern philosophers. The postmetaphysical crisis makes unavoidable a substantiation of purpose that takes into account the contributions of modern thought, especially the critical ones. This detailed exposition of the Thomistic argument and its systematic analysis will try to propose the validity together with its abiding relevance.