140 Moreover, the ranks of the workers themselves are already giving happy and promising signs of a social reconstruction. To Our soul's great joy, We see in these ranks also the massed companies of young workers, who are receiving the counsel of Divine Grace with willing ears and striving with marvelous zeal to gain their comrades for Christ. No less praise must be accorded to the leaders of workers' organizations who, disregarding their own personal advantage and concerned solely about the good of their fellow members, are striving prudently to harmonize the just demands of their members with the prosperity of their whole occupation and also to promote these demands, and who do not let themselves be deterred from so noble a service by any obstacle or suspicion. Also, as anyone may see, many young men, who by reason of their talent or wealth will soon occupy high places among the leaders of society, are studying social problems with deeper interest, and they arouse the joyful hope that they will dedicate themselves wholly to the restoration of society.
Source: Quadragesimo Anno (Vatican.va)