Its warmer by the equator becaue the sun is by the equator.
It was important because it helped people spread the religion to various parts of the land. Traders and merchants traveled and spread their religion while traveling and since everyone wanted to trade with them the religions spread quickly.
The Song Dynasty was prosperous in many respects of the society. In agriculture, the productive technology was improved which promoted the output of food; in handicraft industry, the division of labor became more detailed which made the handicrafts technology reach an advanced level; additionally, the development of the commodity economy exceeded the previous level. Particularly, the earliest paper currency appeared at that period.
It is protected by the fact that it has a system of separation of powers with three branches that control each other and prevent tyrannical behavior from a single branch. They are also separated into local provinces and autonomous regions that are ruled by small scale governments that have some degree of independence and that could easily oppose a new form of tyrannical government.
