As a result of the constant attacks by the Vikings and other nomads, the governments of Europe were constantly under attack. Communities did not feel that their governments were providing adequate protection for them against outsiders. The economies of Western Europe were in shambles, and trade routes were disrupted.
As the monarchs of central governments lost power, a new type of government evolved called Feudalism. Feudalism began in France around 900 A.D., and spread throughout the remainder of Europe within 150 years.
There is a great difference between knowing a thing and understanding it.
Prophet of Progress
The oldest man-made structure still existing is the central edifice of the 4,600-year-old tomb built at Sakkara, Egypt.