First, the ivory tower law, collapse always starts with small things. Now let's look at the probability of the collapse of those dynasties, almost all of which started with the simplest things. For example. There are many reasons for the negativity of a dynasty. When people are in turmoil, the dynasty will fall into chaos. Some courtiers usurped power and seized power. This is also because their ambitions are expanding, and the situation at that time gave them opportunities, so a person's desire is terrible.
Second, we can tide over the difficulties together, but we can't enjoy wealth. Look at those founding heroes. Few of them can have a good future. Leaders are like this. When you help me conquer the world, I treat you well and give you enough trust, but when the world is in my hands, you must never threaten my rule. This is also because the family business is too big, everyone is unfaithful and has no previous trust.
Third, the tax reform saw that those dynasties were bound to carry out so-called agricultural and economic reforms. Some reforms have lightened the burden on the people, but others have backfired and made the people more miserable. It is precisely because people's lives are not satisfied that they naturally complain very much. It seems that under the continuous backlog of these grievances, fish have inspired the so-called peasant uprising.
Fourth, having enemies in peacetime is actually a good thing, because having enemies can let these dynasties know the importance of the army and know that they must be strong so as not to be bullied. If there is no contrast around the enemy, they will eventually be destroyed because there is no contrast.
Five, the heyday will decline. Even if those dynasties lasted for hundreds of years, they could not escape the fate of decline. Because under the influence of prosperity, they forget to indulge their desires and do not know how to make progress, so they will naturally perish.