According to the hypothesis of economic man, people's behavior is to obtain benefits, so how to judge whether a thing brings them benefits or losses? You need to analyze it according to intelligence. This kind of information may be personal experience, friends' advice or history.

That is, only by taking history as a mirror can we know the truth of rise and fall.

History is formed by the interaction of all people in the world. Perhaps the role of an ordinary person is only minimal, but society is a chaotic system with the same butterfly effect. What you say today may also trigger a revolution several generations later.

Without information, analysis, wrong information and wrong analysis, correct information and wrong analysis, correct information and correct analysis, are their results promoting or hindering? History is a kind of wisdom, a statistic and summary of past events.

Studying history is not only for the country and the people, but also for yourself. Because nationals are made up of one person. One day, you will sit in a key position. If you can "know the rise and fall", it will benefit the country and the people. You are a common people and know more about history. At least you won't stand on the opposite side of the wheel of history. Perhaps, you are the last straw to crush the camel.