PACEM IN TERRIS:
A PERMANENT COMMITMENT
1. Almost forty years ago, on Holy Thursday, 11 April 1963, Pope John XXIII published his epic Encyclical Letter Pacem in Terris. Addressing himself to “all men of good will”, my venerable predecessor, who would die just two months later, summed up his message of “peace on earth” in the first sentence of the Encyclical: “Peace on earth, which all men of every era have most eagerly yearned for, can be firmly established and sustained only if the order laid down by God be dutifully observed” (Introduction: AAS, 55 [1963], 257).
Speaking peace to a divided world
2. The world to which John XXIII wrote was then in a profound state of disorder. The twentieth century had begun with great expectations for progress. Yet within sixty years, that same century had produced two World Wars, devastating totalitarian systems, untold human suffering, and the greatest persecution of the Church in history.
Only two years before Pacem in Terris, in 1961, the Berlin Wall had been erected in order to divide and set against each other not only two parts of that City but two ways of understanding and building the earthly city. On one side and the other of the Wall, life was to follow different patterns, dictated by antithetical rules, in a climate of mutual suspicion and mistrust. Both as a world-view and in real life, that Wall traversed the whole of humanity and penetrated people's hearts and minds, creating divisions that seemed destined to last indefinitely.
Moreover, just six months before the Encyclical, and just as the Second Vatican Council was opening in Rome, the world had come to the brink of a nuclear war during the Cuban Missile Crisis. The road to a world of peace, justice and freedom seemed blocked. Humanity, many believed, was condemned to live indefinitely in that precarious condition of “cold war”, hoping against hope that neither an act of aggression nor an accident would