Gregory XVII's Universal Encyclical for Christian Unity. Message addressed to Bishops, Priests, Religious Brothers and Sisters, to Public Officials, to our Protestant brothers, and to all the faithful. This work addresses various current problems and is a veritable blueprint for the reconstruction of a truly Christian society. Basing himself on the teaching of Our Lord Jesus Christ in the Gospel, Gregory XVII proposes realistic solutions for an authentic religious and social reform. Available in English, French, Spanish and Italian. 288 pages,