What role did the diverse forms of governmental play

What role did the diverse forms of governmental play

With the disintegration of the Roman Empire, the bonds between the West and East began to disintegrate. Why did conflict as opposed to cooperation prevail between the three stepchildren of Rome and between the new powers of Europe?

What role did the diverse forms of governmental play in the political and economic interaction throughout the medieval periods? Use at least 2 different primary sources of your choice to illustrate your stance