quality:correction
Catholic social teaching

Solidarity is an element of Catholic social teaching. According to Pope Francis:

No one can remain insensitive to the inequalities that persist in the world... the Brazilian people, particularly the humblest among you, can offer the world a valuable lesson in solidarity, a word that is too often forgotten or silenced because it is uncomfortable... I would like to make an appeal to those in possession of greater resources, to public authorities and to all people of good will who are working for social justice: never tire of working for a more just world, marked by greater solidarity

The Church's teaching on solidarity is explained in the Compendium of the Social Doctrine of the Church, and briefly summarised in the Catechism of the Catholic Church: