It is really luck that the Sima Yi family can gain the world, and although it has a lot to do with the ability and talent of Sima Yi and Sima Zhao's father and son, it is more dependent on luck. In 265, Sima Yi's grandson Sima Yan deposed the last emperor of the State of Wei, The Wei Yuan Emperor Cao Wan, and established the Western Jin Dynasty. This Western Jin Dynasty was originally the fourth feudal dynasty to unify China after the Qin Dynasty and the Two Han Dynasties, but it brought ruin to the Chinese nation.
The reason why the Sima family gained the country was that they used deceptive means to hoodwink everyone at the beginning of their power, and then they did the acts of "deposing the king" and "killing the king" as courtiers, and because they relied on conspiracies to ascend to the throne, they were more inclined to the family, which led to the rebellion of the Eight Kings against their own families and the Wuhu Chaos against all the Han people. The gaopingling rebellion in 249 was the beginning of the Sima family's gaining power. Prior to this, in the writings of the people at that time, Sima Yi was a positive figure who could be compared with Zhuge Liang, which made it difficult for modern people to imagine.
During the Wei and Jin dynasties, the mind was relatively open, everyone developed freely, what bamboo forest seven sages, what Tao Yuanming, what two Xie, there were many freelance writers, these readers did not very much look up to the imperial court, but some contempt, for the Usurper Sima family naturally did not have a good impression, in the book will not have any good words, over time, it is so.
The Sima family succeeded in usurping the throne through deceptive means, but they did not know how to cherish this achievement, but instead caused the entire people of the Central Plains to fall into a fiery situation, and it is no wonder that posterity did not have any good feelings for the Sima family.