Wu Guangliang saw that everyone had realized the importance of the issue he had raised, so he continued: "Due to the uncontrollable nature of various diseases, disasters, and accidents, many people cannot smoothly enter the 'death curve' in the actual development process.

Therefore, from the perspective of the entire human society, the number of people in a certain age group is absolutely decreasing compared to the number of people in this age group in the past period.

Because the newly added people could not have been born in the past, and those born in the past must have died, so that the people of this age, in their years to come, will only be fewer and less, until all of them die.

Theoretically, if a couple has two children, the total population will not decline.

But in reality, human life is very fragile, and a couple has to have at least 2.1 children on average to ensure that the total population does not decline, which is why the replacement fertility rate is set at 2.1.

This extra 0.1 percentage point is added in response to the depopulation caused by various diseases, disasters, and accidents.

At a certain age of childbearing, only when the average number of births per couple reaches the replacement fertility rate can the number of children in society as a whole not decline.

Therefore, the average fertility rate determines whether the total population of a society increases or decreases.

After we have figured this out, we will be able to control the population of our Huaxia Kingdom within a reasonable range and avoid possible problems in the future. ”

Li Yan, who was temporarily recalled by Wei Minsheng through a shared space, said: "Are you worried that the population of Huaxia is too large, which will cause a shortage of land?

I remember that the total population of the previous dynasty should be far above the current size of our Huaxia Kingdom.

Since the previous dynasty could feed several times the population of our Huaxia Kingdom when the materials were not as abundant as ours, and our Huaxia Kingdom had more high-yield grain, there is no reason why it would be worse than the previous dynasty, right? ”

Wei Minsheng thought for a while and said: "The total population of a society cannot continue to grow, because everyone needs to occupy a certain amount of social resources to live.

Although the world is large, there are not many places that are really suitable for human survival, so there is an upper limit to the total population that can survive in this world.

The grain you planted in the past can reach 200 catties per mu, which is a rare bumper yield, even in Huaxia country, where we are already using high-yield seeds, there is an upper limit to the yield per mu of this land.

In addition, the most critical factor restricting the unrestricted rise of population is freshwater resources, because the amount of freshwater resources cannot be controlled by human beings.

Therefore, a certain amount of land can only support a certain number of people at most.

You don't realize this now, because before the founding of China, no country had ever been able to reach such a level of high development.

Moreover, in the previous dynasties, once there was such a thing as a lack of resources, there would be constant outward wars, and while gaining the wealth and resources of other countries, it would naturally reduce some of the population.

In a situation where no country can achieve absolute defense, all people are immune to the scourge of war.

Even if a powerful dynasty can last for hundreds of years, it still can't prevent the outbreak of war, either actively or passively, every once in a while, because this is the simplest and most direct way for any ruling class to deal with a crisis of material shortage.

However, in our current Huaxia country, the problem of lack of basic survival materials has been basically solved.

Moreover, with the armed forces of the Chinese Self-Defense Forces, it is already possible to defend against the enemy thousands of miles away.

As long as I am still here, I can at least guarantee that within a hundred years, there will be no strong enemy who can shake the defense of Huaxia Kingdom.

In the case that other countries do not have the ability to destroy the cities of Huaxia, all people living in the cities of Huaxia are safe and will not be affected by the war.

Therefore, under such circumstances, our Huaxia Kingdom has actually entered a relatively mature society that can develop steadily.

In the case of hundreds of years without shortage of food and without thinking about the scourge of war, what kind of problems do you think will arise? ”

After checking all the members of Huaxia Guo currently registered in the system, Xiao Bao said: "When our Huaxia Kingdom was founded, there were only a few thousand official members, and even if all the subsidiary members were added, there were only more than 10,000 people.

But in just over four years, our Huaxia Kingdom now has more than 120,000 full members, and with the addition of subsidiary members, the total population has exceeded one million. ”

"This ...... That's ...... Over a million? ”

"Oh my God, in just four years, the population has increased nearly a hundredfold!" ……

Li Yan frowned unconsciously when he heard the figure that Xiaobao had just announced, and said, "Although the population of Huaxia Kingdom has increased dramatically in four years, most of these increased populations still come from the people around who have voluntarily joined.

I think that's normal!

At least, all countries in history have been like this at the beginning of their founding, constantly gathering their populations, and then when the population reaches a certain level, they will achieve a foundation for eternity. ”

Wu Guangliang shook his head and said, "Wan Shi Jiye, Minister Li, which dynasty in history do you think has done it?"

As far as I know, the longest dynasties were only over 800 years old, and most of them collapsed within two or three hundred years.

And the most fundamental reason for the change of these dynasties is that their land can no longer support their people.

When I talk about this, I'm not thinking about the present, but about thinking about what will happen in 20 years, or even 100 years.

In just four years, the total population of Huaxia has increased tenfold.

Everyone has studied mathematics, and if it continues at this rate, the total population of Huaxia will reach 10 million in four years. ”

"I'm afraid Chairman Wu is a bit alarmist, even if you add up the population of Wei, Shu, and Wu, I'm afraid there are not 10 million now."

"This world is not only as big as you think, in addition to the three kingdoms of Wei, Shu and Wu in your eyes, there are Xianbei, Fuyu and Goguryeo in the north, Jiaozhi, Linyi and Funan in the south, Qiangdi and the Western Regions in the west.

Further away from our Huaxia Kingdom, there was an empire called Rome, whose population reached about 80 million.

Therefore, with such a large number of people around, it is very simple for the total population of our Huaxia Kingdom to reach 10 million.

Moreover, I even believe that as long as the Huaxia Kingdom can develop steadily for a hundred years and is not controlled, it is normal for the total population to exceed 500 million. ”

After a pause, Wu Guangliang said: "In order to achieve an optimal social age structure in Huaxia, I think it is necessary to implement 'family planning'. ”

"Family planning?" Wei Minsheng was also a little stunned when he heard Wu Guangliang put forward this "basic national policy" that was controversial in another world.