What accounts for the different historical trajectories of the byzantine and the west european expressions of christendom?

The survival of a capable majestic state in the Byzantine Empire brought about more prominent state control over the Orthodox Church. The Eastern Orthodox confidence ventured into Eastern Europe when the Byzantine Empire was at its stature, yet it was driven from different areas, especially in North Africa and the Near East, by the extension of Islam. The Roman Catholic custom turned into the more far-reaching of the two articulations, as its impact spread into non-Christian northern Europe, Orthodox Eastern Europe, and Islamic Spain.