37 Pius XI saw the re-establishment of the economic world within the framework of the moral order and the subordination of individual and group interests to the interest of the common good as the principal remedies for these evils. This, he taught, necessitated an orderly reconstruction of society, with the establishment of economic and vocational bodies which would be autonomous and independent of the State. Public authority should resume its duty of promoting the common good of all. Finally, there should be co-operation on a world scale for the economic welfare of all nations.
Source: Mater et Magistra (Vatican.va)