In document 1 with the excerpt from Genghis Khan was that people should have their rights and freedoms of their own religion and none be forced upon them. So religion and cultural aspects could mix and their society would flourish. I believe he said this because he saw other civilizations fall because of internal rebellion against people trying to force people into doing something they didnt want to do. With his system though it allowed everyone to be happy about having their religious beliefs .Also when people talked about their religion with others then that cause new religions to be made with the combining of the talked about religion .
In document 5 that Mongols had ideas of knowledge and were very educated in astronomy and engineering. They were not just brutes that tore down stuff in there path and took over places just to lead them carelessly, they were the exact opposite. They were intelligent and continued to learn and become a much more sophisticated society over time. It apparently worked because in Document 3 it showed the empires that the Mongols were able to take control of because of their ideas on how to rule places you have taken over.
Politics were important in their society. Document 1 it was excerpt from Genghis Khan which was like a precedent to all future Khan Rulers. It told them how to act and lead their society. In Document 2 it had information about the roles of the women in the empire. After one of the Khanss died it was the wifes job to make sure that her son would be heir of the throne. This kept the throne within the family. It was like insurance that the ruler ship would be left to someone who was a worthy enough to rule a huge empire. The Inventions, ideas, and politics affected the role of Mongol dominance integration of Eurasia greatly.