The phenomenon of the social injustice, the poverty, the social exclusion and the concentration of the wealth, although not new, have been the points of reference of the practice of Jesus’ gospel, as a source light for the minds of the Popes that turn a continuous present the fight for the freedom, the fraternity, the solidarity and the fairness in their Encyclicals. The Social Doctrine of the Church accepts the mutual relationship between the capital and the work but in a society in which the worker doesn’t degrade himself, being only measured from the objective and external side of his work, but rather he is valued as a person, as somebody who belongs to a community of communal work, who belongs to a society that appreciates the work and that fights without fatigue for the justice, the freedom and the fairness.