Civil wars. Probably the most important single cause of Byzantium's collapse was its recurrent debilitating civil wars. Three of the worst periods of civil war and internal infighting took place during Byzantium's decline.
C: it led to the withdrawal of many members in the North.
The 2 rivers acted as common ground between people. they made food and people lived near them, soon communities were built that made a civilization.
One of the most basic messages that Jesus preached was to love your neighbor and to treat others fairly, which spread mostly due to sermons and word of mouth. Unfortunately many Christians have forgotten this part of Jesus' teachings.
