Several sources state that the word ius originates from Sanskrit, an ancient Indo-European language, which means to unite or bind and the derivations of "ius" are "iudex" which means judge, "iurisprudentia (jurisprudence) and" justice which means justice; while other sources affirm that the word ius is the equivalent in our language to the word "right" and that it is used to designate what is good and just. The term ius is used in the field of law and according to Ulpiano, a Roman jurist of Phoenician origin, who addresses the quotation of the Greek philosopher Celso from the 2nd century, defines ius as "the art of what is good and fair.
In Ancient Rome the ius was understood or attributed to the set or group of principles and equitable and good norms by men, but at first these were confused with the term “fas” which were the norms emanated from the divinity also called divine right, which gave the total content to the "ius." An act, by that time, was completely legal and lawful if the divine will was consulted; But man had the necessary ability to thus detach or release the religious in human beings.
Some terms used in Ancient Rome to give meaning to ius are:
Objective law, which are the group of norms that constitute a legal system also called positive law.
Rite or ritual expression.
Subjective right is the right or jurisdictional action of an individual to require another to do or do something in particular.
Also to describe the procedural stage of a trial.
And, as mentioned before, it manifests itself as the good and the fair. Among others.
