The preference for sons over daughters has a long history in China, but it is not static. Du Fu, a poet in the Tang Dynasty, said in a military vehicle shop that it is unlucky to have a son, but it is much better to have a daughter ... Girls can also marry their nearest neighbors, and boys will die in battle. It can be seen that people's mentality changed a little at that time. Old people like to have boys for the so-called family line, but if having boys can't accomplish this mission, everyone will have great expectations for girls. In fact, ancient people did not necessarily strictly demand blood inheritance, but kept surnames and sacrifices. During the Spring and Autumn Period and the Warring States Period, people followed the Zhou Li, and there was a reason for the war between the two countries. The defeated party can be exiled, but can't be killed, because at that time, sacrificing others seems to be an evil thing. If the lineal blood relatives have died, the glory of the family can be restored through the form of adopted sons and retainers.

Later, people thought that having a boy could carry on the family line, mainly from the perspective of survival. Living conditions in ancient times were very bad. Even in a unified country, conflicts often occur between people, and disputes need to be resolved by force. For example, during the drought, water resources became the main factor that determined people's survival, and there were frequent struggles between the two villages for water, even in the early days of the founding of the People's Republic of China. In the process of conflict resolution, men play a decisive role as soldiers, which is incomparable to women.

At present, the influence of clan society in the south is still relatively large, and the probability of such a thing happening in previous years is also great. Tell a story about a friend's house. In order to avoid the dark area, I won't mention where it is for the time being. The two villages had a friction because of some trivial matters. Each village is basically a family, and the two villages decided to solve the problem by force. At this time, it was stipulated in the village that all men over 18 and under 50 must participate in the war. If there is only one man in the family, they can not go. If there are casualties, as long as everyone in the village is compensated. This ethos is a legacy of our traditional ethos, which was much more serious in ancient times. Conflicts will also occur between the same villages. If there are few men in your family, you will inevitably be bullied. Brothers should fight side by side in this respect. Through this ethos, we can look back at the way of thinking of ancient people. In order to ensure the interests of the family, to ensure the interests of the family, a large number of men are needed, and when the national war breaks out, men also have to fight as soldiers. Clans are made up of clans, and countries are made up of clans. This is the traditional social system in China, and all this is decided around the number of men. Therefore, people will think that having boys is good for carrying on the family line. In fact, this is originally to meet the needs of survival.

With the development of time, people's ideas are gradually distorted, and they begin to pay more attention to consanguineous inheritance, that is, the transmission of Y chromosome. This ancient concept is very different. We abandoned the essence, but kept the dross. Modern patriarchal clan events are fundamentally different from those in ancient times. Today, the phenomenon of son preference has undergone great changes, and gender equality is the main theme of today's society.