There are many factors contributing to the population growth rate. The first one is the growth of life expectancy.

In areas with good medical environment, the average life expectancy has reached 160 years. Note that the average life expectancy, individual maintenance is particularly good, even live to 238 years old!

In such a high life-span situation, who is willing to stay with a partner for a lifetime?

The cultural environment of the whole civilization is slowly changing because of the growth of life span.

After all, man is a creature that likes the new and dislikes the old. In the past, he lived together for 50 or 60 years, but now he lives together for 150 or 60 years!

Human beings will remain young and middle-aged for a long time. Most people prefer to have enough fun first, rather than having a family and having children

As a result, the marriage rate is low and the birth rate is naturally reduced.

The second is the cost of training talents. The demand of advanced space industry for population quality is higher and higher. But in just a few hundred years, human intelligence will not advance by leaps and bounds.

Cultivating a high-quality talent may consume most of a family's savings.

Therefore, in most families, one is enough.

"Many young people don't like to get married, let alone have children. Keeping Dink, on the contrary, can greatly improve the quality of life. It's hard enough for these young people to support themselves. Where can we consider the whole national security? "

"On the contrary, some poor countries have higher birth rates Even if distance network education is popularized, under the influence of specific environment, the probability of high-quality talents is still not much. "

Looking at this report, Zhang Yuan was slightly worried.

The aging trap is a terrible crisis.

The more the elderly, the heavier the social burden on the young.

The heavier the burden on young people and the poorer their economic conditions, the less willing they are to have children.

It's a vicious circle, and it's very difficult to get out of it. Even if the government introduces various policies to encourage childbearing, they often fail to achieve good results

History has proved that the best way to cure aging is war!

Yes, the reshuffle brought about by war can bring about a baby boom, which has been proved many times by history.

But at present, the trend of the whole world is peaceful development, and it is impossible to have a war.

Moreover, as a normal person, Zhang Yuan did not want to use the world war to solve the problem of aging. He simply put the cart before the horse.

He shakes his head, forgets all this nonsense and continues to analyze the data.

[under the influence of this trend of thought, the population of Banguo has decreased from 51 million to 15 million, which is the first country that will self perish due to aging. 】

"Alas, human, pill!" Sentimental John looked on and began to sigh again.

"Life expectancy has become the best contraceptive. There are more and more rubbish people in poor countries. They generally rely on the relief of rich countries. I really don't know what's the use of these people. "

In fact, Zhang Yuan was not very good at arguing. He retorted: "at least poor countries are also raw material producing places, which still plays a role. Without poverty, where can we get rich? As long as it is productivity, even if it is lower, how can it be useless! "

"In your eyes, there are no pills."

John was stunned: "indeed, the development of earth civilization needs low-end population It can't be all high-quality people. The distribution of population, no matter what era, must be a pyramid. "

Zhang Yuan shook his head: "in fact, on the whole, the earth's civilization is still moving forward, isn't it? As for the population problem, I believe it can be solved. Every era has its own problems, and it can not be plain sailing. "

"I don't really believe that human beings will die because of the problem of aging."

John replied, "Zhang Yuan, you are too optimistic. So far, human beings have been using greedy strategies. When there is a problem, we will find a way to solve it instead of preventing it from happening. "

"This kind of decision-making system is unscientific in itself, and will probably step into the trap of mediocrity. Aging is already a big problem. "

Zhang Yuan actually knows this, but he still has a natural sense of expectation towards his mother civilization.

In this case, he didn't want to argue too much with John, just read on to the following report.

In order to deal with a series of problems caused by the stop of population growth, government departments are constantly encouraging fertility, and introducing relevant policies.

This kind of population policy does not have decades of effort, and basically will not have much effect. So he skipped the development of the middle 30 years and turned to the latest report.

When he saw the first few lines, his spirit was shocked.

"Hello, colleagues of earth age! I am the new president of the deep space foundation, yuan Yuchan. I will bring you the latest information about the earth's civilization. "The new president of the foundation has become a middle-aged woman, but it doesn't matter.

"In recent years, the best scientific and technological achievements have appeared in biology, mainly in the decoding of protein language and the emergence of artificial uterus technology!"

“…… The deciphering of protein language has brought about a qualitative change in life science! "

"We have conquered a large number of diseases, including pancreatic cancer, the king of cancer, and various malignant diseases..."

"It's no longer an extravagant hope to overcome the drug resistance of superbacteria!"

Great news!

Seeing this, Zhang Yuan couldn't help sitting in his seat and smiling.

The following is a large number of papers on protein language, involving all aspects of biology.

However, Zhang Yuan did not know much about biology, so he could not comment on it.

He only knows that the work of deciphering protein language is extremely important. Human beings can deeply understand the essence of life from the most micro level.

For a simple example, in the immune system, HIV has abandoned the evil to the good, which can help treat the immune deficiency. Some people with congenital immune deficiency can be cured now. This kind of medical treatment can only be said to be impossible before!

"Life expectancy is going up again. I don't know if it will affect the marriage rate." Zhang Yuan asked with great interest: "have our biologists studied these new drugs?"

"I'm studying it." John turned his head and said, "our current equipment is so poor that we can't make this kind of medicine to improve our life span for the time being Next year, there will be a meeting on life science, but it's not our turn to attend. I'm not a biologist

"All right." Zhang Yuan shook his head. Anyway, he was still young, and he didn't have to think too much about life span and so on.

The question of life and death, think too much, just out of thin air trouble.