Why did ancient people prefer boys to girls?

From the perspective of biogenetics, the Y chromosome in the sex chromosome that determines a man can only come from his father, which is the only evidence that family genetic information can be preserved, that is, it is often said that it is fragrant every day. However, a pair of X chromosomes in women will lose paternal or maternal genetic information when they are inherited. After several generations, the paternal and maternal genes will be completely lost.

society

Men are naturally superior to women in physical strength and logical judgment. In the early stage of human evolution, stronger physical strength and logical judgment meant more food sources and more chances of survival in tribal wars.

economy

Because of the natural advantages of men's physiology and sociality, they can get greater comprehensive returns by paying equal attention to their sons and daughters. In the case of limited or even lack of resources, it also constitutes the economic reason why parents prefer sons to daughters.

[Edit this paragraph] Preference for boys in life customs.

In some social cultures and customs, there will be a preference for sons over daughters. For example, some rural areas in China stipulate that women who have never given birth to boys cannot attend weddings [1]. In the traditional funeral ceremony in East Asia, the mourning for paternal relatives is more important than that for maternal relatives of the same generation and the same level, such as mourning for uncles is more important than that for aunts; Even if they are paternal or maternal relatives, the mourning for men will be heavier than that for women. For example, mourning for uncles is heavier than mourning for aunts.

Some languages also show a preference for boys over girls. For example, in Chinese, "women's opinion" refers to the opinions of people without knowledge, and "women's benevolence" refers to kindness that does not take care of the overall situation and contains the meaning of belittling women's intelligence. In Japanese, when addressing other people's husbands, they will be called "Yuji", while when addressing other people's wives, they will only be called "Aozhu" or "Aozhu" ("Aozhu" means "indoor"), which means that only the husband is the head of the family.