No book except the Bible itself had a greater influence on the Middle Ages than The City of God by St. Augustine.  And since medieval Europe was the cradle of modern Western society, The City of God by St. Augustine is vital for understanding our world and how it came into being. 
The City of God by St. Augustine is an interpretation of history in terms of the struggle between good and evil: the City of God in conflict with the City of the Devil. This book is abridged for the modern reader.
