While Protestants form innumerable commissions and committees to discuss the basis for a just and durable peace, Catholics may turn to their Pope and discover from his utterances the official Catholic position on the many questions involved in a consideration of the post-war world. This invaluable book is a review, summary and interpretation of the encyclicals and other communications and addresses of the three Popes of the 20th century, Lee XIII, Pius XI, and Pius XII. For Catholics, this provides a clear and excellent summary of their church's teaching bearing on some of the vital problems of the day; the relation of Church and state, the Catholic position anent Fascism, Nazism and Communism, family life (birth control and divorce), education, the economic problem, war and peace and the nature of the New Order the Catholic Church would support. Non-Catholics cannot but admire many of the forthright and courageous utterances of these truly great Christian leaders. In view of the powerful influence exerted by the Catholic Church, not only in Europe, but in the United States, everyone interested in permanent peace should know along what lines the Catholic Church would move. To all readers this clear exposition of the Catholic position will be revealing; to many it will be disturbing. In any case, this is a most important book.