Pope John XXIII
Mater et Magistra §84
Mater et Magistra: On Christianity and Social Progress
84 It is not possible to give a concise definition of the kind of economic structure which is most consonant with man's dignity and best calculated to develop in him a sense of responsibility. Pius XII, however, comes to our rescue with the following directive: "The small and average sized undertakings in agriculture, in the arts and crafts, in commerce and industry, should be safeguarded and fostered. Moreover, they should join together in co-operative associations to gain for themselves the benefits and advantages that usually can be gained only from large organizations. In the large concerns themselves there should be the possibility of moderating the contract of work by one of partnership." (30)
Source: Mater et Magistra (Vatican.va)