Explanation:
The legal of opinions and laws of the Roman Empire where compiled (termed as Justinian code) and used by the leaders that made it clear that all the Power of the area would be centralized and would come under the centralized legal system. This opinion is being used politically at many places throughout the world. Justinian code has made a major legal impact in many civil laws that are being followed by countries today.
I would say language diffusion
The Zhou created the Mandate of Heaven: the idea that there could be only one legitimate ruler of China at a time, and that this ruler had the blessing of the gods. They used this Mandate to justify their overthrow of the Shang, and their subsequent rule.
Answer:
The Crusaders brought back new ideas to Europe.
