Why was the Southern Song Dynasty so prosperous that it was destroyed by the Yuan Dynasty, which was backward in productivity?

The Southern Song Dynasty was a dynasty with frequent wars. Although it was very powerful, it was also weather-beaten, because the war continued and it could not withstand a major blow, especially at that time, all foreigners were eyeing the surrounding Southern Song Dynasty.

In fact, the main reason for extinction was that the nomadic people in Mobei dealt a devastating blow to the advanced relations of production in the Song Dynasty, because the nomadic people in Mobei had developed very well at that time, and there was a great conflict between the local people and the people in the Southern Song Dynasty in the marginal areas of Mobei, so the nomadic people in Mobei had a very strong resentment against the Southern Song Dynasty.

At that time, the war lasted until the late Southern Song Dynasty, and the national economy and army were exhausted by the war. After Song and Jin reached a peace agreement, the two sides stopped the war with the Qinling Mountains and Huaihe River as the boundary. However, in the middle and late Southern Song Dynasty, traitors were frequent, the government was corrupt, and the country was unable to develop. It can really be said that it is internal trouble and foreign invasion. On the contrary, in the depression of Southern Song Dynasty, Mongolians in Mobei grassland began to rise.

They took advantage of the fact that no one was in charge and no one could make decisions in the Southern Song Dynasty, which seriously damaged the advanced productive forces in the Southern Song Dynasty. Finally, they also got very good strategic materials. Temujin established the Yuan Dynasty. Although the Yuan Dynasty was not fully developed, it was not a problem to confront such a weak Southern Song Dynasty.

Finally, in desperation, the Southern Song Dynasty was destroyed by the Yuan Dynasty.