مِنگزی یا منسیوس((به چینی: 孟子؛) (به پینیینی: Mèng Zǐ)) فیلسوف چینی سدهٔ چهارم پیش از میلاد است. او در ۳۷۲ (پ.م) در ایالت ژو متولد شد و در ۲۸۹ (پ.م) در ۸۳ سالگی درگذشت. او پیرو کئونگ چی نوادهٔ کنفوسیوس بود و در راه گسترش و به کرسی نشاندن اندیشههای کنفوسیوس کوشا بود. اندیشههای او در شکلدادن نوکنفوسیوسگرایی اثرگذار بود.
Wikipedia contributors, "Mencius," Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/w/index.php?title=Mencius&oldid=291643702 (accessed May 25, 2009).
Mencius (// MEN-shee-əs) or Mengzi (372–289 BC or 385–303 or 302 BC) was a Chinese Confucian philosopher who has often been described as the "second Sage", that is after only Confucius himself. Living during the Warring States period, he is said to have spent much of his life travelling around China offering counsel to different rulers. Conversations with these rulers form the basis of the Mencius, which would later be canonised as a Confucian classic.
A key belief of his was that humans are innately good, but that this quality requires cultivation and the right environment to flourish. He also taught that rulers must justify their position of power by acting benevolently towards their subjects, and in this sense they are subordinate to the masses.
Mencius, also known by his birth name Meng Ke (孟軻), was born in the State of Zou, now forming the territory of the county-level city of Zoucheng (originally Zouxian), Shandong Province, only thirty kilometres (eighteen miles) south of Qufu, Confucius's birthplace.
He was an itinerant Chinese philosopher and sage, and one of the principal interpreters of Confucianism. Supposedly, he was a pupil of Confucius's grandson, Zisi. Like Confucius, according to legend, he travelled throughout China for forty years to offer advice to rulers for reform. During the Warring States period (403–221 BC), Mencius served as an official and scholar at the Jixia Academy in the State of Qi (1046 BC to 221 BC) from 319 to 312 BC. He expressed his filial devotion when he took three years leave of absence from his official duties for Qi to mourn his mother's death. Disappointed at his failure to effect changes in his contemporary world, he retired from public life.
Mencius is buried in the "Mencius Cemetery" (孟子林, Mengzi Lin, also known as 亞聖林, Yasheng Lin), which is located 12 km to the northeast of Zoucheng's central urban area. A stele carried by a giant stone tortoise and crowned with dragons stands in front of his grave.
Mencius's mother is often held up as an exemplary female figure in Chinese culture. One of the most famous traditional Chinese four-character idioms is 孟母三遷 (pinyin: mèngmǔ-sānqiān; literally: 'Mencius's mother moves three times'); this saying refers to the legend that Mencius's mother moved houses three times before finding a location that she felt was suitable for the child's upbringing. As an expression, the idiom refers to the importance of finding the proper environment for raising children.
Mencius's father died when Mencius was very young. His mother Zhǎng (仉) raised her son alone. They were very poor. At first they lived by a cemetery, where the mother found her son imitating the paid mourners in funeral processions. Therefore, the mother decided to move. The next house was near a market in the town. There the boy began to imitate the cries of merchants (merchants were despised in early China). So the mother moved to a house next to a school. Inspired by the scholars and students, Mencius began to study. His mother decided to remain, and Mencius became a scholar.
Another story further illustrates the emphasis that Mencius's mother placed on her son's education. As the story goes, once when Mencius was young, he was truant from school. His mother responded to his apparent disregard for his education by taking up a pair of scissors and cutting the cloth she had been weaving in front of him. This was intended to illustrate that one cannot stop a task midway, and her example inspired Mencius to diligence in his studies.
There is another legend about his mother and his wife, involving a time when his wife was at home alone and was discovered by Mencius not to be sitting properly. Mencius thought his wife had violated a rite, and demanded a divorce. His mother claimed that it was written in The Book of Rites that before a person entered a room, he should announce his imminent presence loudly to let others prepare for his arrival; as he had not done that in this case, the person who had violated the rite was Mencius himself. Eventually Mencius admitted his fault.
Duke Huan of Lu's son through Qingfu (慶父) was the ancestor of Mencius. He was descended from Duke Yang of the State of Lu (魯煬公). Duke Yang was the son of Bo Qin, who was the son of the Duke of Zhou of the Zhou dynasty royal family. The genealogy is found in the Mencius family tree (孟子世家大宗世系).
Mencius's descendants lived in Zoucheng in the Mencius Family Mansion, where the Mencius Temple was also built and also a cemetery for Mencius's descendants.
During the Ming dynasty, one of Mencius's descendants was given a hereditary title at the Hanlin Academy by the Emperor. The title they held was Wujing Boshi (五經博士; 五經博士; Wǔjīng Bóshì). In 1452 Wujing Boshi was bestowed upon the offspring of Mengzi-Meng Xiwen (孟希文) 56th generation and Yan Hui-Yan Xihui (顔希惠) 59th generation, the same was bestowed on the offspring of Zhou Dunyi-Zhou Mian (週冕) 12th generation, the two Cheng brothers (Cheng Hao and Cheng Yi-Chen Keren (程克仁) 17th generation), Zhu Xi-Zhu Ting (朱梴) 9th generation, in 1456–1457, in 1539 the same was awarded to Zeng Can's offspring-Zeng Zhicui (曾質粹) 60th generation, in 1622 the offspring of Zhang Zai received the title and in 1630 the offspring of Shao Yong.
One of Mencius's direct descendants was Dr. Meng Chih (Anglicised as Dr. Paul Chih Meng) former director of China House, and director of the China Institute in 1944. Time magazine reported Dr. Meng's age that year as 44. Dr. Meng died in Arizona in 1990 at the age of 90.  North Carolina's Davidson College and Columbia University were his alma mater. He was attending a speech along with Confucius descendant H. H. Kung.
In the Republic of China there is an office called the "Sacrificial Official to Mencius" which is held by a descendant of Mencius, like the post of "Sacrificial Official to Zengzi" for a descendant of Zengzi, "Sacrificial Official to Yan Hui" for a descendant of Yan Hui, and the post of "Sacrificial Official to Confucius, held by a descendant of Confucius.
The descendants of Mencius still use generation poems for their names given to them by the Ming and Qing Emperors along with the descendants of the other Four Sages (四氏): Confucius, Zengzi, and Yan Hui.
One of Mencius's descendants moved to Korea and founded the Sinchang Maeng clan.
While Confucius himself did not explicitly focus on the subject of human nature, Mencius asserted the innate goodness of the individual, believing that it was society's influence – its lack of a positive cultivating influence – that caused bad moral character. "He who exerts his mind to the utmost knows his nature" and "the way of learning is none other than finding the lost mind."
The four beginnings (or sprouts)
To show innate goodness, Mencius used the example of a child falling down a well. Witnesses of this event immediately feel
Human nature has an innate tendency towards goodness, but moral rightness cannot be instructed down to the last detail. This is why merely external controls always fail in improving society. True improvement results from educational cultivation in favorable environments. Likewise, bad environments tend to corrupt the human will. This, however, is not proof of innate evil because a clear thinking person would avoid causing harm to others. This position of Mencius puts him between Confucians such as Xunzi who thought people were innately bad, and Taoists who believed humans did not need cultivation, they just needed to accept their innate, natural, and effortless goodness. The four beginnings/sprouts could grow and develop, or they could fail. In this way Mencius synthesized integral parts of Taoism into Confucianism. Individual effort was needed to cultivate oneself, but one's natural tendencies were good to begin with. The object of education is the cultivation of benevolence, otherwise known as Ren.
According to Mencius, education must awaken the innate abilities of the human mind. He denounced memorization and advocated active interrogation of the text, saying, "One who believes all of a book would be better off without books" (盡信書，則不如無書, from 孟子.盡心下). One should check for internal consistency by comparing sections and debate the probability of factual accounts by comparing them with experience.
Mencius also believed in the power of Destiny in shaping the roles of human beings in society. What is destined cannot be contrived by the human intellect or foreseen. Destiny is shown when a path arises that is both unforeseen and constructive. Destiny should not be confused with Fate. Mencius denied that Heaven would protect a person regardless of his actions, saying, "One who understands Destiny will not stand beneath a tottering wall". The proper path is one which is natural and unforced. This path must also be maintained because, "Unused pathways are covered with weeds." One who follows Destiny will live a long and successful life. One who rebels against Destiny will die before his time.
Views on politics and economics
Mencius emphasized the significance of the common citizens in the state. While Confucianism generally regards rulers highly, he argued that it is acceptable for the subjects to overthrow or even kill a ruler who ignores the people's needs and rules harshly. This is because a ruler who does not rule justly is no longer a true ruler. Speaking of the overthrow of the wicked King Zhou of Shang, Mencius said, "I have merely heard of killing a villain Zhou, but I have not heard of murdering [him as] the ruler."
This saying should not be taken as an instigation to violence against authorities but as an application of Confucian philosophy to society. Confucianism requires a clarification of what may be reasonably expected in any given relationship. All relationships should be beneficial, but each has its own principle or inner logic. A Ruler must justify his position by acting benevolently before he can expect reciprocation from the people. In this view, a King is like a steward. Although Confucius admired Kings of great accomplishment, Mencius is clarifying the proper hierarchy of human society. Although a King has presumably higher status than a commoner, he is actually subordinate to the masses of people and the resources of society. Otherwise, there would be an implied disregard of the potential of human society heading into the future. One is significant only for what one gives, not for what one takes.
Mencius distinguished between superior men who recognize and follow the virtues of righteousness and benevolence and inferior men who do not. He suggested that superior men considered only righteousness, not benefits. That assumes "permanent property" to uphold common morality.  To secure benefits for the disadvantaged and the aged, he advocated free trade, low tax rates, and a more equal sharing of the tax burden.
Comparisons to contemporaries
Xun Zi was a Confucian who believed that human nature is centered on self-interest and greed, and the purpose of moral cultivation is to develop our nature into goodness. This put him at odds with Mencius. Later, the thinker Zhu Xi declared the views of Xun Zi to be unorthodox, instead supporting the position of Mencius.
Mencius's interpretation of Confucianism has generally been considered the orthodox version by subsequent Chinese philosophers, especially by the Neo-Confucians of the Song dynasty. Mencius's disciples included a large number of feudal lords, and he is said to have been more influential than Confucius had been.
The Mencius (also spelled Mengzi or Meng-tzu), a book of his conversations with kings of the time, is one of the Four Books that Zhu Xi grouped as the core of orthodox Neo-Confucian thought. In contrast to the sayings of Confucius, which are short and self-contained, the Mencius consists of long dialogues, including arguments, with extensive prose. It was generally neglected by the Jesuit missionaries who first translated the Confucian canon into Latin and other European languages, as they felt that the Neo-Confucian school largely consisted of Buddhist and Taoist contamination of Confucianism. Matteo Ricci also particularly disliked Mencius's strong condemnation of celibacy as unfilial. François Noël, who felt that Zhu's ideas represented a natural and native development of Confucius's thought, was the first to publish a full edition of the Mencius at Prague in 1711;[d] as the Chinese rites controversy had been recently decided against the Jesuits, however, his edition attained little influence outside central and eastern Europe.
In a 1978 book purporting to estimate the hundred most influential persons in history to that point, Mencius is ranked at 92.
The first Mencius Institute was established in Xuzhou, China in 2008 under a collaboration between Jiangsu Normal University, China Zoucheng Heritage Tourism Bureau, and Xuzhou Mengshi Clan Friendship Network.