Pope Pius XI
Quadragesimo Anno §38
Quadragesimo Anno: On Reconstruction of the Social Order
38 But if this cannot be said of organizations which Our same Predecessor intensely desired established among employers and managers of industry - and We certainly regret that they are so few - the condition is not wholly due to the will of men but to far graver difficulties that hinder associations of this kind which We know well and estimate at their full value. There is, however, strong hope that these obstacles also will be removed soon, and even now We greet with the deepest joy of Our soul, certain by no means insignificant attempts in this direction, the rich fruits of which promise a still richer harvest in the future.
Source: Quadragesimo Anno (Vatican.va)