I think you can put government or industry and other things
Hilter was an extraordinary speaker and has the ability to convince people that could bring them into happiness
The middle-class European people being much more powerful during the Commercial Revolutions than it was under the feudalism best describe the economic difference between European feudalism and later economic models that emerged in Europe following the Commercial Revolution.
The answer to your question is: The emperors had lacked the leadership skills to rule the dynasty and the officials were also corrupt. Because of the corruption and mismanagement of the dynasty, a certain group led by Zhu Yuangzhang went against the dynasty and caused the fall.