EN
This paper presents two discourses of natural law in Greek and medieval tradition: the Stoic account of lex, the account of ius in the understanding of Francis Suarez, and the concept of natural law in terms of St. Thomas Aquinas. The aim of this paper is twofold: firstly, it is to describe the history and the development of the concept of natural law from its early, Stoic expressions to its late medieval modification. And secondly, to argue for the thesis, according to which the Aquinas’s proposal, based on his concept of “nature”, avoids the difficulties of the Stoic approach associated with the continuity between the legal and moral justification and the nature.