International audienceThe legal humanism of the 16th century, opposing the mos gallicus to the tradition of the mos italicus, is characterized by philological and historicist approach of the corpus of Roman law and by the will to find the letter and spirit within. The work of François Connan, immediately celebrated in his time and greatly influencing the later jurists, is a key moment in the systematization of law, which he is the first to accomplish. By focusing on the exposition of the first principles of law and to deduce from it the whole legal order, he transforms presentation and meaning of the law. His rational exposition of the law leads him to expose the idea that men share a community of law, the ius gentium, governing the whole E...