This collection investigates the theological developments and ecclesiastical debates that defined the later patristic period of the Christian Church. Henry Bettenson, a noted scholar of early Christian history, compiles and translates primary source documents to illustrate the shift in doctrinal focus from the fourth to the fifth centuries. The work argues that the writings of these figures provide the essential framework for understanding the evolution of orthodox dogma during a time of significant institutional transition.

Scholars and students of theology frequently cite this volume as a reliable and accessible entry point into the complex thought of the later Church Fathers. Experts highlight the clarity of Bettenson's translations as a standard resource for academic study in the field of patristics.