The legacy of Pope John to the world includes two major social documents: the encyclicals Mater et Magistra and Pacem in Terris. This book derives its title from the familiar American identification. In it Father Cronin of the social action department of the NCWC (National Catholic Welfare Conference) studies Mater et Magistra, a document which will have enduring value. Because it is a composite of many ideas this encyclical deserves close study and analysis. Here an provides the guidance needed. Excerpts from the encyclical are interwoven into the commentary which is in terms familiar to American Catholics. Review questions follow each chapter and a suggested reading list is included at the end of the book..... All concerned with the applications of Christian teaching and natural ethics to the complex society in which we live will find in Christianity and Soviets Progress a masterful , relatively simple guide to what Pope John meant in Mater et Magistra.