When Christianity came into the world it found a number of different political theories already in existence. These various conflicting concepts; Hebrew, Greek and Roman, influenced Christianity in varying degrees and in varying degrees were influenced by Christianity. Christianity as such added no new ideas to the current stock of political notions. The Hebrew Christian retained his Jewish theory; as did the Greek and the Roman in perhaps a less degree. The development of the Christian conception of the state, the Church, and history generally is a process of elimination, selection, adaptation, and synthesis of the various elements of political theory current in contemporary Hebrew and pagan thought. The characteristic modern separation of Church and State, the divorce between religion and government, existed as a matter of fact in early Christianity. But it was forced upon the Christians by the historical situation. As an idea it was foreign alike to Jews and Christians, Greeks and Romans. It was contrary to the whole body of contemporary political theory. The union of Church and State in the Fourth century, which has been so deplored by many modern historians and moralists was in reality perfectly inevitable. The social mind of the whole ancient world made any other course impossible either to Christians or Pagans once Christianity had developed to the point where it was the most powerful religious force in society. The theocratic nature of Jewish thought and practice is generally recognized but the close connection of religion and government in the pagan educational system is not perhaps so much emphasized. To quote Pollock: "It costs us something to realize the full importance of philosophy to the Greek or Roman citizen who had received a liberal education. For him it combined in one whole body of doctrine all the authority and influence which nowadays are divided, not without contention, by science, philosophy, and religion in varying shares. It was not an intellectual exercise or special study, but a serious endeavor to gather up the results of all human knowledge in their most general form, and make them available for the practical conduct of life."