Abstract

Grotius, the 17th century European philosopher, is a landmark in the Enlightnment Thought, considering the role of Justice and Law in a society that is ruled by the Natural Law, that is the law that is previous to the law draft by man and inspire and legitimatize it. Grotius believed that according with the perfectioning of Man a socety will come on which peace will prevail as Man acquire the abality to act according with its conscience, that is Reason and Sense of Justice. The next three hundred years of history of Mankind quickly contradited the idealism of Grotius but his inheritors, the international jurists, defend that in a system based on international rules, where nations are judged by their conformity to the international law, peace and security will, definitively, prevail.