Mozi, as a famous thinker, politician, strategist, social activist and natural scientist in the Warring States period, put forward the views of "universal love" and "non-aggression". Mohism had a great influence at that time and was accepted by the broad masses of the people, but he advocated "universal love" and "non-aggression", put forward the political thoughts of "Shang Xian" and "Shang Tong" and advocated obedience to emperors and vassal states. The people should obey the monarch, be righteous with the world, and love each other and oppose the war of bullying. During the Warring States period, these were unacceptable to the monarch at that time.
The rational factors in his thought were inherited and developed by later materialist thinkers, and the dross of his mysticism was absorbed and utilized by theologians after Qin and Han Dynasties.
As for the demise of Mohism, it was because it did not meet the requirements of feudal rule.
1. First of all, feudal society is a hierarchical society. Mohism's thought of "universal love" advocates equality and friendship regardless of class differences. This can be welcomed by the broad masses of the lower classes, but it will be rejected by the ruling class.
2. Mohism puts forward "non-attack", which refers to the war against injustice. During the Spring and Autumn Period and the Warring States Period, when the vassal states of "Big Fish eat small fish" were constantly annexed, this idea would not be accepted by those vassal states.
3. In feudal society, in order to maintain their own rule, rulers advocated combining the theory of destiny of Confucianism. Therefore, Mohism's theory of "non-destiny" is unpopular again;
4. In the feudal society, in order to stabilize their rule, the rulers put rites and music at the top of education and Confucianism at the top of a hundred schools, which led to the theory of "ousting a hundred schools of thought and respecting Confucianism alone" in the Han Dynasty, but the Mohist theory of "frugality" and "unhappiness" was unacceptable.
Therefore, with the feudal rule, Confucianism was emphasized as the philosophical foundation of the country, and Confucianism became orthodox, ending other ideological systems. Mohism gradually died out in the Jin Dynasty.