Maurice Goguel 
The Birth of Christianity [PDF ebook] 

Originally published in 1953, The Birth of Christianity analyses the development of Christian doctrine and the establishment of the Church.

The book traces the history of the formation of the Church as a new religious society and considers its development both in the realm of thought as well as on a social level, in both emotional life and moral action. It explores how the Christian faith first found expression in society through a variety of forms that were gradually assimilated into one system of doctrine, and examines both how Christian theology and dogma were formed, and how the Church developed its constitution.

The Birth of Christianity will appeal to those with an interest in the history of religion, the history of Christianity, theology, and the philosophy of religion.