Nodoubt, Genghis Khan had established a vast empire. The newly vanquished people had no inclination towards their new ruler. Several causes were responsible for this.
The main causes were:
1. The Mongols during the course of their expedition destroyed several beautiful cities and towns. Most of these cities lost their glory after his attack.
2. Their invasion also badly affected the agriculture, because when the huge forces passed away they destroyed standing crops.
3. During war year or the time of invasion trade and commerce was badly affected.
4. A large number of people lost their lives due to their invasion. Many became handicapped and helpless.
5. A number of people were slaves.
6. As a result of their invasion, the timely repair to the underground rivers in the arid region was not carried out.
7. All his invasions resulted in rapid desertification of newly conquered areas.
8. People from all walks of life had to face hardships.