221. Progress in building a people in peace, justice and fraternity depends on four principles related to constant tensions present in every social reality. These derive from the pillars of the Church’s social doctrine, which serve as “primary and fundamental parameters of reference for interpreting and evaluating social phenomena”. In their light I would now like to set forth these four specific principles which can guide the development of life in society and the building of a people where differences are harmonized within a shared pursuit. I do so out of the conviction that their application can be a genuine path to peace within each nation and in the entire world.
 Pontifical Council for Justice and Peace, Compendium of the Social Doctrine of the Church, 161.
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