The encyclical Sollicitudo Rei Socialis (The Social Concern of the Church) was promulgated by Saint John Paul II on December 30, 1987, on the occasion of the twentieth anniversary of Populorum Progressio, Saint Paul VI's encyclical on the development of peoples. In this document, the Pope analyzes the problems of the contemporary world from a Christian perspective, denouncing economic and social inequalities and calling for greater solidarity among nations.
Its teaching reinforces the social doctrine of the Church, highlighting the importance of social justice, integral human development, and the moral responsibility of nations and businesses in building a more just and fraternal world. Its message remains relevant in a world plagued by inequality, exploitation, and economic crises.