Hugo Grotius (1583-1645)

On the Law of War and Peace

De Iure Belli ac Pacis

VI. The next thing to be considered is the right, which men have to the common use of things, already appropriated; terms, in which at the first sight there appears to be some inconsistency, as it appears that the establishment of property has absorbed every right that sprung from a state of things held in common. But this is by no means the case. For the intention of those, who first introduce private property, must be taken into the account. And it was but reasonable to suppose, that in making this introduction of property, they would depart As little as possible from the original principles of natural equity. For if written laws are to be construed in a sense, approaching as nearly as possible to the laws of nature, much more so are those customs which are not fettered with the literal restrictions of written maxims. From hence it follows that in cases of extreme necessity, the original right of using things, as if they had remained in common, must be revived; because in all human laws, and consequently in the laws relating to property, the case of extreme necessity seems to form an exception.

Upon this principle is built the maxim that if in a voyage provisions begin to fail, the stock of every individual ought to be produced for common consumption; for the same reason a neighboring house may be pulled down to stop the progress of a fire: or the cables or nets, in which a ship is entangled, may be cut, if it cannot otherwise be disengaged. Maxims, none of which was introduced by the civil law, but only explained by it according to the rules of natural equity.