<human>:  What does the title ‘Pacem in Terris’ mean?
<bot>: Pacem in Terris is Latin for “Peace on Earth”. The Encyclical was written by Pope John XXIII in 1963. The Pope wrote it in response to the growing Cold War tensions between the United States and the Soviet Union. The Encyclical is a message of peace and dialogue between people of different religions, races, and nations.