The wisdom of the ancients is not worse than that of modern people, and even slightly better in some aspects. For example, the "Art of War of Sun Tzu", which has been handed down to this day, still has extraordinary significance to this day. There is also the well-known "Thirty-Six Plans", which is also the crystallization of the wisdom of the ancients. In the eyes of the ancients, the highest realm of planning is the Yang plot, conspiracy may be you can be wary of, but the Yang Plot is invincible, even if you know that the front is a pit, or you have to jump down without hesitation.
Among those famous Yang plots in ancient times, the most powerful one was the "Tui En Order" issued by Emperor Wu of Han. Before the edict of tuien, the greatest problem faced by the emperors was the threat of the increasingly powerful princely states. For example, during the Spring and Autumn Period, the powerful princely states had long ceased to pay attention to Zhou Tianzi. Although the weak Zhou Tianzi is a heavenly son, he is actually extinct in name only. The main culprit for this was the inheritance system at that time.
The ancient inheritance system was based on the "Western Zhou Patriarchal System" and the "Primogeniture System", which was not perfect. At that time, the lands and titles of the princes could only be inherited by the eldest son, and the other heirs were not eligible to inherit the fiefs of the princes. In this way, the strength of the princes can be well preserved. After a long period of development, these powerful princely states could easily threaten the rule of the emperor.
After Liu Bang, the ancestor of Han Gao, ascended the throne and became emperor, he made a large number of princes. Although he killed many kings with different surnames that year, there were still many princes with the surname Liu who remained. After decades of development, the power of these princes was very large. After the Wen and Jing dynasties, the increasing power of the princes had become the most troublesome problem for the emperor. These princely states often covered thousands of miles and dozens of cities, often secretly resisting the decrees of the imperial court, which greatly weakened the power of the central dynasty. In the time of Emperor Wu of the Han Dynasty, in order to consolidate the power of the emperor, the "Tui En Order" was promulgated on the basis of the county system.
At that time, the fiefs and titles of the princes could only be inherited by concubines, and the other heirs of the princes also complained about this, and Emperor Wu of Han seized this opportunity to issue the "Tui En Order". In the "Tuien Order", in addition to the first son of the princes, the second son and the third son also enjoy the right to inherit. This "edict of tutelage" seemed very fair on the surface, so that the other sons of the princes also received the right to inherit, but it was not a good thing for the princes themselves. Because of this, the fiefdoms of the princes will become smaller and smaller, and it will be difficult to compete with the Central Dynasty.
For example, Liu Bei in the Three Kingdoms period, his ancestors were the famous King Jing of Zhongshan, and he was also considered to be strong among the kings of the Han Dynasty. However, under the influence of the "Tui En Ling", liu Bei's generation, because he had already lost his fiefdom, could only be reduced to the generation of "peddlers and weaving shoes" in Cao Cao's mouth. At that time, the princes of all walks of life also understood the power of the "Push Grace Order", but they could not stop it, knowing that there was a fire pit in front of them, and they could only jump down without hesitation.
From the standpoint of the princes, they were unwilling to accept the "Decree of Grace". But the fact that the princes did not accept it did not mean that his sons did not accept it. After all, in the short term, this "edict of grace" was of great benefit to the other sons of the princes. As for the existence of the princely states hundreds of years later, this is not something they are worried about, as long as they can have a fief in front of them. Therefore, this "Tui En Ling" is actually the Yang scheme of Emperor Wu of The Han Dynasty, who is not afraid that the princes will not be hooked, which can be called the most successful method of cutting the domain, which is simply insoluble for a thousand years.