In the old society, people liked to talk about the issue of having children, and they kept yelling at women. If you don't give birth to a boy, you can't stop until you are forty years old, because family planning was not followed at that time. There was nothing you could do about it. Who let women be responsible for this!
In the 1930s, people all liked heroes. Because of this, those who thought they were heroes always felt that the earth would be out of the solar system without them.
In the 1940s and 1950s, people liked to play revolution. From time to time, they would put up a few slogans and go to the streets to march. It didn't matter whether you were a student or a gangster. As long as you held a small flag and shouted along, you could be called a revolutionary.
In the 1960s and 1970s, people liked to criticize. A few days ago, they were still leaders. A few days later, they had to go to the streets with big signs and get slapped in the face with the soles of their shoes. In the end, they still didn't know where they were wrong.
In the 1980s and 1990s, people loved taking exams. As long as older women chatted together, the only thing they were asked was how their partner's children were doing in their studies. When they learned that the other party's children were not as good as their own children, they suddenly brightened up.
In the 20th century, people all like to go to college. Grandmas in their 80s and children in their 17s and 18s all try their best to get into college. They start to feel how awesome they can be, but within a few months they start to think how stupid they are.