Louis Wolowski and Pierre Émile Levasseur argue that Property is “the fruit of human liberty” and that Violence and Conquest have done much to disturb this natural order (1884)

Property, made manifest by labor, participates in the rights of the person whose emanation it is; like him, it is inviolable so long as it does not extend so far as to come into collision with another right; like him, it is individual, because it has its origin in the independence of the individual, and because, when several persons have co-operated in its formation, the latest possessor has purchased with a value, the fruit of his personal labor, the work of all the fellow-laborers who have preceded him; this is what is usually the case with manufactured articles. When property has passed, by sale or by inheritance, from one hand to another, its conditions have not changed; it is still the fruit of human liberty manifested by labor, and the holder has the same rights as the producer who took possession of it by right.