16 These reforms were carried out in part by States, but in the struggle to achieve them the role of the workers' movement was an important one. This movement, which began as a response of moral conscience to unjust and harmful situations, conducted a widespread campaign for reform, far removed from vague ideology and closer to the daily needs of workers. In this context its efforts were often joined to those of Christians in order to improve workers' living conditions. Later on, this movement was dominated to a certain extent by the Marxist ideology against which Rerum novarum had spoken. These same reforms were also partly the result of an open process by which society organized itself through the establishment of effective instruments of solidarity, which were capable of sustaining an economic growth more respectful of the values of the person. Here we should remember the numerous efforts to which Christians made a notable contribution in establishing producers', consumers' and credit cooperatives, in promoting general education and professional training, in experimenting with various forms of participation in the life of the work-place and in the life of society in general. Thus, as we look at the past, there is good reason to thank God that the great Encyclical was not without an echo in human hearts and indeed led to a generous response on the practical level. Still, we must acknowledge that its prophetic message was not fully accepted by people at the time. Precisely for this reason there ensued some very serious tragedies.
Source: Centesimus Annus (Vatican.va)