The enduring call to action, "If you want peace, work for justice," originated from Pope Paul VI in his Message for the Celebration of the Day of Peace on January 1, 1972. Pope Paul VI, whose papacy spanned much of the Cold War era, was a significant voice for peace, having addressed the United Nations General Assembly with the emphatic declaration, "War never again!" This particular message built upon the teachings of the Second Vatican Council, which he brought to completion, and its articulation of a substantive vision of peace.

This profound statement goes beyond merely wishing for an end to conflict; it asserts that authentic peace cannot exist in a vacuum of injustice. For Pope Paul VI, peace is not simply the absence of war, but rather the presence of social conditions that promote the integral human development of all people. Justice, in this context, is understood as a "sincere feeling for man," recognizing every individual as an inviolable, equal, free, and responsible being. When these fundamental aspects of human dignity are denied, true peace remains elusive.

The relevance of this principle resonates powerfully through history and into our contemporary world. When individuals or nations face injustice—whether economic inequality, denial of civil liberties, or oppressive systems—they often rebel, leading to unrest and conflict. Therefore, working for justice means actively confronting the root causes of division and suffering, demanding a willingness to sacrifice personal prestige and self-interest for the common good. As history continually demonstrates, genuine peace flourishes only when societies are built on foundations of fairness, equality, and respect for all.