Pope John XXIII (1958-1963), subsequently declared a Catholic saint, inaugurated a new global stage of Catholic Social Teaching. His two great social encyclical letters, MATER ET MAGISTRA (1961) and PACEM IN TERRIS (21963) are foundational documents for this new global stage. This book provides a summary and commentary for John's famous document, which is still periodically celebrated at the United Nations. The summary provides a clear and detailed...