Mater et Magistra §97

⁹⁷ In modern times we have seen an extensive increase in the number of workers' associations, and their general recognition in the juridical codes of single States and on the international level. Members are no longer recruited in order to agitate, but rather to co-operate, principally by the method of collective bargaining. But it is worthwhile stressing here how timely and imperative it is that workers be given the opportunity to exert their influence throughout the State, and not just within the limits of their own spheres of employment.