Judging from the evolutionary history of mankind, monogamy has been the norm for millions of years. This is because people's brains are more developed, which leads to the baby's head is bigger, so women must give birth early to reduce the risk of dystocia. "Premature" human babies are very weak for at least one year, and must always be taken care of by their mothers, so that their mothers lose the opportunity to go out for food. Therefore, the baby should be raised by at least two people together, and the joint care of husband and wife is the best choice. For men, by taking care of the baby, he can also improve his chances of survival and ensure his gene transmission. Otherwise, if the baby dies after birth because of lack of care, he will not be able to achieve his goal of gene transmission. Of course, just like all creatures whose mothers are mainly responsible for taking care of their larvae, human males have a certain tendency to be polygamous, which can be seen from the fact that male individuals are slightly larger than female individuals (so biologist E Wilson said that human beings are "lightly polygamous animals" in the late 1970s). Therefore, many traditional societies (and some modern societies, including the Mormon Church in the United States) allow polygamy, but it should also be noted that even in such societies, monogamy is still the norm, and those who have the ability to marry more than one wife are, after all, a minority. As for polyandry, this kind of society is certainly not without, but it belongs to an extreme and deformed society with extremely special causes and cannot be treated as a typical one. Although polygamy is not against human nature, it is impossible to allow polygamy in the current situation in China. After all, we are a country that pursues equality, and most people (including myself) agree with this principle on the issue of marriage. Therefore, if the landlord really wants to restore polygamy in China, I suggest giving up this "dream". Of course, for friends who go to the other extreme, I also want to remind you that even under monogamy, men still have ways to achieve polygamy in disguise. It is easy for men to remarry after divorce, but it is relatively difficult for women to remarry after divorce. This is the so-called "sequential polygamy". In short, it is my suggestion to recognize human nature and find feasible ways to pursue happiness within this framework.