48 Those, therefore, are doing a work that is truly salutary and worthy of all praise who, while preserving harmony among themselves and the integrity of the traditional teaching of the Church, seek to define the inner nature of these duties and their limits whereby either the right of property itself or its use, that is, the exercise of ownership, is circumscribed by the necessities of social living. On the other hand, those who seek to restrict the individual character of ownership to such a degree that in fact they destroy it are mistaken and in error.
Source: Quadragesimo Anno (Vatican.va)