Gratian's Decretum

Brindisi,  Biblioteca Pubblica Arcivescovile Annibale De Leo A-1, fol.1r

ca. 1150 A.D.

There is another type of law as Isidore of Seville (ca.  560 – 4 April

 636) says in his Etymologies

 What is natural law\right? Quid sit ius naturale?

Natural rights are common to all nations.  They have their origins in nature not in any constitution.  Examples of natural rights are the union of men and women, the procreation and raising of children, the common possessions of all persons, the equal liberty of all persons (omnium una libertas), the acquisition of things that are taken  from the heavens, earth, or sea, the return of property or money that has been deposited or entrusted.  This also includes the right to repel violence with force.   1. These things and similar are never unjust but are natural and equitable.