Mohism or Moism (Chinese: 墨家; pinyin: Mòjiā; literally "School of Mo") was a Chinese philosophy developed by the followers of Mozi (also referred to as Mo Tzu (Master Mo), Latinized as Micius), 470 BC–c.391 BC. It evolved at about the same time as Confucianism, Taoism and Legalism, and was one of the four main philosophic schools during the Spring and Autumn Period (from 770 BC to 480 BC) and the Warring States Period (from 479 BC to 221 BC). During that time, Mohism (墨 Mo) was seen as a major rival to Confucianism (儒 Ru). The Qin dynasty, which united China in 221 BC, adopted Legalism as the official government philosophy and suppressed all other philosophic schools. The Han dynasty that followed adopted Confucianism as the official state philosophy, as did most other successive dynasties, though Taoism and later Buddhism also played an important part in later Chinese life and thought, while Mohism all but disappeared as a separate school of thought. Mohist books were later merged into Taoist canon.
Mohism is best known for the concepts of "impartial care" (Chinese: 兼愛; pinyin: Jian Ai; literally "inclusive love/care"). This is often translated and popularized as "Universal Love", which is potentially misleading as Mozi believed that the essential problem of human ethics was an excess of partiality in compassion, not a deficit in compassion as such. His aim was to re-evaluate behavior, not emotions or attitudes. Another concept most associated with him is that of "No Invasion" (Chinese: 非攻; pinyin: Fei Gong; literally "No Attack") Mozi's philosophy was described in the book Mozi, compiled by his students from his lecture notes.
Mozi believed that the norm of handing out important government responsibilities to one's relatives regardless of capabilities, as opposed to those who were best equipped to handle these responsibilities, restricted social mobility. Mozi taught that as long as a person was qualified for a task, he should keep his position, regardless of blood relations. If an officer were incapable, even if he were a close relative of the ruler, he ought to be demoted, even if it meant poverty.
A ruler should be in close proximity to talented people, treasuring talents and seeking their counsel frequently. Without discovering and understanding talents within the country, the country will be destroyed. History unfortunately saw many people who were murdered, not because of their frailties, but rather because of their strengths. A good bow is difficult to pull, but it shoots high. A good horse is difficult to ride, but it can carry weight and travel far. Talented people are difficult to manage, but they can bring respect to their rulers.
Law and order was an important aspect of Mozi's philosophy. He compared the carpenter, who uses standard tools to do his work, with the ruler, who might not have any standards by which to rule at all. The carpenter is always better off when depending on his standard tools, rather than on his emotions. Ironically, as his decisions affect the fate of an entire nation, it is even more important that a ruler maintains a set of standards, and yet has none. These standards cannot originate from man, since no man is perfect; the only standards that a ruler uses have to originate from Heaven, since only Heaven is perfect. That law of Heaven is Love.
In a perfect governmental structure where the ruler loves all people benevolently, and officials are selected according to meritocracy, the people should have unity in belief and in speech. His original purpose in this teaching was to unite people and avoid sectarianism. However, in a situation of corruption and tyranny, this teaching might be misused as a tool for oppression.
Should the ruler be unrighteous, seven disasters would result for that nation. These seven disasters are:
- Neglect of the country's defense, yet there is much lavished on the palace.
- When pressured by foreigners, neighbouring countries are not willing to help.
- The people are engaged in unconstructive work while useless fools are rewarded.
- Law and regulations became too heavy such that there is repressive fear and people only look after their own good.
- The ruler lives in a mistaken illusion of his own ability and his country's strength.
- Trusted people are not loyal while loyal people are not trusted.
- Lack of food. Ministers are not able to carry out their work. Punishment fails to bring fear and reward fails to bring happiness.
A country facing these seven disasters will be destroyed easily by the enemy.
Rather than standards of national wealth which are rationalized in terms of first-world development, industrialization, capital and assets appreciation, trade surplus or deficit; the measure of a country's wealth in Mohism is a matter of sufficient provision and a large population. Thriftiness is believed to be key to this end. With contentment with that which suffices, men will be free from excessive labour, long-term war and poverty from income gap disparity. This will enable birth rate to increase. Mozi also encourages early marriage.
Morality and impartiality
Mohism promotes a philosophy of impartial caring; that is, a person should care equally for all other individuals, regardless of their actual relationship to him or her. The expression of this indiscriminate caring is what makes man a righteous being in Mohist thought. This advocacy of impartiality was a target of attack by the other Chinese philosophical schools, most notably the Confucians, who believed that while love should be unconditional, it should not be indiscriminate. For example, children should hold a greater love for their parents than for random strangers.
Mozi is known for his insistence that all people are equally deserving of receiving material benefit and being protected from physical harm. In Mohism, morality is defined not by tradition and ritual, but rather by a constant moral guide that parallels utilitarianism. Tradition varies from culture to culture, and human beings need an extra-traditional guide to identify which traditions are morally acceptable. The moral guide must then promote and encourage social behaviors that maximize the general utility of all the people in that society.
"What is the purpose of houses? It is to protect us from the wind and cold of winter, the heat and rain of summer, and to keep out robbers and thieves. Once these ends have been secured, that is all. Whatever does not contribute to these ends should be eliminated."—Mozi, Mozi (5th century BC) Ch 20
Mohist ethics are considered a form of consequentialism, sometimes called state consequentialism. Mohist ethics evaluates the moral worth of an action based on how it contributes to the stability of a state, through social order, material wealth, and population growth. According to the Stanford Encyclopedia of Philosophy, Mohist consequentialism, dating back to the 5th century BC, is the "world's earliest form of consequentialism, a remarkably sophisticated version based on a plurality of intrinsic goods taken as constitutive of human welfare." 
Unlike hedonistic utilitarianism, which views pleasure as a moral good, "the basic goods in Mohist consequentialist thinking are... order, material wealth, and increase in population". During Mozi's era, war and famines were common, and population growth was seen as a moral necessity for a harmonious society. The "material wealth" of Mohist consequentialism refers to basic needs like shelter and clothing, and the "order" of Mohist consequentialism refers to Mozi's stance against warfare and violence, which he viewed as pointless and a threat to social stability. Stanford sinologist David Shepherd Nivison, in the The Cambridge History of Ancient China, writes that the moral goods of Mohism "are interrelated: more basic wealth, then more reproduction; more people, then more production and wealth... if people have plenty, they would be good, filial, kind, and so on unproblematically." In contrast to Bentham's views, state consequentialism is not utilitarian because it is not hedonistic. The importance of outcomes that are good for the state outweigh the importance of individual pleasure and pain.
Mozi posited that the existence of society as an organized organism reduces the wastes and inefficiencies found in the natural state. Conflicts are born from the absence of moral uniformity found in man in his natural state, i.e. the absence of the definition of what is right (是 shì) and what is wrong (非 fēi). We must therefore choose leaders who will surround themselves with righteous followers, who will then create the hierarchy that harmonizes Shi/Fei. In that sense, the government becomes an authoritative and automated tool. Assuming that the leaders in the social hierarchy are perfectly conformed to the ruler, who is perfectly submissive to Heaven, conformity in speech and behaviour is expected of all people. There is no freedom of speech[when defined as?] in this model. However, the potentially repressive element is countered by compulsory communication between the subjects and their leaders. Subjects are required to report all things good or bad to their rulers. Mohism is opposed to any form of aggression, especially war between states. It is, however, permissible for a state to use force in legitimate defense. Mohist ideology has inspired some modern pacifists.
In addition to creating a school of philosophy, the Mohists formed a highly structured political organization that tried to realize the ideas they preached. This political structure consisted of a network of local units in all the major kingdoms of China at the time, made up of elements from both the scholarly and working classes. Each unit was led by a juzi (literally, "chisel"—an image from craft making). Within the unit, a frugal and ascetic lifestyle was enforced. Each juzi would appoint his own successor. However, there was no central authority beyond the writings of Mozi. Mohists developed the sciences of fortification and statecraft, and wrote treatises on government, ranging in topic from efficient agricultural production to the laws of inheritance. They were often hired by the many warring kingdoms as advisers to the state. In this way, they were similar to the other wandering philosophers and knights-errant of the period. They were distinguished from others, however, in that they hired out their services not only for gain, but also in order to realize their own ethical ideals.
Mohists believed in heaven as a divine force (天 Tian), the celestial bureaucracy and spirits which knew about the immoral acts of man and punished them, encouraging moral righteousness. Due to the vague nature of the records, there is a possibility that the Mohist scribes themselves may not have been clear about this subject. Nevertheless, they were wary of some of the more atheistic thinkers of the time, such as Han Fei. Using historical records, Mohists argued that the spirits of innocent men wrongfully murdered had appeared before to enact their vengeance. Spirits had also been recorded to have appeared to carry out other acts of justice. In fact, the rulers of the period had often ritually awarded punishments and rewards to their subjects in spiritually important places to garner the attention of these spirits and ensure that justice was done. The respect of these spirits was deemed so important that prehistoric Chinese ancestors had left their instructions on bamboo, plates and stones to ensure the continual obedience of their future descendants to the dictates of heaven. In Mozi's teachings, sacrifices of bulls and rams were mentioned during appointed times during the spring and autumn seasons. Spirits were described to be the preexisting primal spirits of nature, or the souls of humans who had died. The Mohists polemicized against elaborate funeral ceremonies and other wasteful rituals, and called for austerity in life and in governance. On the other hand, spiritual sacrifices were not deemed wasteful.
Mozi disagrees with the fatalistic mindset of people, accusing the mindset of bringing about poverty and sufferings. To argue against this attitude, Mozi used three criteria (San Biao) to assess the correctness of views. These were:
- Assessing them based on history
- Assessing them based on the experiences of common, average people
- Assessing their usefulness by applying them in law or politics
In summary, fatalism, the belief that all outcomes are predestined or fated to occur, is an irresponsible belief espoused by those who refuse to acknowledge that their own sinfulness has caused the hardships of their lives. Prosperity or poverty are directly correlated with either virtue or sinfulness, respectively; not fate. Mozi calls fatalism a heresy which needs to be destroyed.
By the time of Mozi, Chinese rulers and the wealthier citizens already had the practice of extravagant burial rituals. Much wealth was buried with the dead, and ritualistic mourning could be as extreme as walking on a stick hunchback for three years in a posture of mourning. During such lengthy funerals, people are not able to attend to agriculture or care for their families, leading to poverty. Mozi spoke against such long and lavish funerals and also argued that this would even create resentment among the living.
Mozi views aesthetics as nearly useless. Unlike Confucius, he holds a distinctive repulsion to any development in ritual music and the fine arts. Mozi takes some whole chapters named "Against Music" （《非乐》） to discuss this. Though he mentions that he does enjoy and recognize what is pleasant, he sees them of no utilization in terms of governing, or of the benefit of common people. Instead, since development of music involves man's power, it reduces production of food; furthermore, appreciation of music results in less time for administrative works. This overdevelopment eventually results in shortage of food, as well as anarchism. This is because manpower will be diverted from agriculture and other fundamental works towards ostentations. Civilians will eventually imitate the ruler's lusts, making the situation worse. Mozi probably advocated this idea in response to the fact that during the Warring States period, Zhou King and the landlords spent countless time in the development of delicate music while ordinary peasants could hardly meet their subsistence needs. To Mozi, bare necessities are sufficient; resources should be directed to benefit man.
One of the schools of Mohism that has received some attention is the Logicians school, which was interested in resolving logical puzzles. Not much survives from the writings of this school, since problems of logic were deemed trivial by most subsequent Chinese philosophers. Historians such as Joseph Needham have seen this group as developing a precursor philosophy of science that was never fully developed, but others[who?] believe that recognizing the Logicians as proto-scientists reveals too much of a modern bias.
The Mohist canon of the Mo Jing described various aspects of many fields associated with physical science, and provided a small wealth of information on mathematics as well. It provided an 'atomic' definition of the geometric point, stating that a line is separated into parts, and the part which has no remaining parts (i.e. cannot be divided into smaller parts) and thus the extreme end of a line is a point. Much like Euclid's first and third definitions and Plato's 'beginning of a line', the Mo Jing stated that "a point may stand at the end (of a line) or at its beginning like a head-presentation in childbirth. (As to its invisibility) there is nothing similar to it." Similar to the atomists of Democritus, the Mo Jing stated that a point is the smallest unit, and cannot be cut in half, since 'nothing' cannot be halved. It stated that two lines of equal length will always finish at the same place, while providing definitions for the comparison of lengths and for parallels, along with principles of space and bounded space. It also described the fact that planes without the quality of thickness cannot be piled up since they cannot mutually touch. The book provided definitions for circumference, diameter, and radius, along with the definition of volume.
One consequence of Mohist understanding of mathematics and the physical sciences combined with their skills as artisans was that they became the pre-eminent siege engineers of pre Qin unification China, capable of both reducing defences and holding cities. In keeping with their belief in furthering peace, small cadres of mohist siege engineers would offer their services to city states at risk of being swallowed up by larger neighbors. On occasion the knowledge that Mohists were helping to prepare a city's defences was enough to dissuade attack.
The Mohists beliefs were outside the mainstream of Chinese thought and culture, however because of their utility as siege engineers they were tolerated and employed for their skills. With the unification of China under the Qin there was no longer any call for their skills and their teachings were suppressed in favour of Legalism.
Jin Guantao, a professor of the Institute of Chinese Studies at the Chinese University of Hong Kong, Fan Hongye, a research fellow with the Chinese Academy of Sciences' Institute of Science Policy and Managerial Science, and Liu Qingfeng, a professor of the Institute of Chinese Culture at the Chinese University of Hong Kong, have argued that without the influence of proto-scientific precepts in the ancient philosophy of Mohism, Chinese science lacked a definitive structure:
From the middle and late Eastern Han to the early Wei and Jin dynasties, the net growth of ancient Chinese science and technology experienced a peak (second only to that of the Northern Song dynasty)... Han studies of the Confucian classics, which for a long time had hindered the socialization of science, were declining. If Mohism, rich in scientific thought, had rapidly grown and strengthened, the situation might have been very favorable to the development of a scientific structure. However, this did not happen because the seeds of the primitive structure of science were never formed. During the late Eastern Han, disastrous upheavals again occurred in the process of social transformation, leading to the greatest social disorder in Chinese history. One can imagine the effect of this calamity on science.
- Bokko (manga)
- A Battle of Wits- a 2006 film about a Mohist agent
- A Step into the Past- 2001 television series in which a time travelling protagnist is initially mistaken for a Mohist because of his 20th Century ethics, and throughout the series he is given aid by hidden Mohists.
- Logic in China
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