There are many factors contributing to the population growth rate, the first of which is the increase in life expectancy.

In areas with better medical environments, the average life expectancy is as high as 160 years. Note that the average life expectancy, individual maintenance is particularly good, and even live to 238 years old!

In such a long lifespan, who wants to stay with a partner for a long time?

The human environment of the entire civilization is slowly changing because of the increase in life expectancy.

After all, human beings are creatures who like the new and hate the old, and the previous "companionship for a lifetime" was fifty or sixty years, and the current companionship for a lifetime is one hundred and fifty or sixty years!

Humanity will remain young and mature for a long time, and the vast majority of people would rather have enough fun before talking about it before they have a family and have children......

As a result, the marriage rate is sluggish, and the birth rate naturally decreases.

Second, there is the issue of the cost of cultivating talents, and the cutting-edge space industry has higher and higher requirements for the quality of the population. But in just a few hundred years, human intelligence does not advance by leaps and bounds.

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

So, in most families, having one is enough.

"Many young people don't like to get married, and they don't like to have children. Maintaining 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 think about the entire national security? ”

"On the contrary, some poor countries have higher birth rates...... Even if distance online education is popular, the probability of high-quality talents appearing under specific environmental influences is still not much. ”

Looking at this report, Zhang Yuan was slightly worried.

The ageing trap, an extraordinarily terrifying crisis.

The more older the elderly, the heavier the social burden on the youngsters.

And the heavier the burden on young people, the worse their economic conditions, the more reluctant they are to have children.

It's a vicious circle, and it's very difficult to jump out of it. Even if the government introduces various policies to encourage childbirth, it often does not have a very good effect......

History proves that the best way to cure aging is - war!

That's right, the reshuffling brought about by war can bring about a peak in fertility, and this idea has been proven many times by history.

But at present, the trend of the whole world is peaceful development, and it is no longer possible to have a war.

Moreover, as a normal person, Zhang Yuan does not want to use the world war to solve the problem of aging, which is simply putting the cart before the horse.

He shook his head, put the thoughts behind him, and continued to analyze the data.

[Under the influence of this ideology, the population of Bang Country has been reduced from the original 51 million to 15 million, and it is the first country that will destroy itself due to aging. 】

"Alas, humans, pills!" The sentimental John watched from the sidelines and began to sigh again.

"The increase in life expectancy has become the best contraceptive pill. There are more and more garbage people in poor countries, and they generally rely on the handouts of rich countries to get by, and I really don't know what the use of these people is. ”

Discussing the dispute, Zhang Yuan was actually not very good at it, and he retorted: "At least poor countries are also raw material producers, and they still have a little effect, without poverty, where does wealth come from?" As long as it is productivity, even if it is a little lower, how can it be useless! ”

"In your eyes, it's a pill anyway."

John was stunned: "Indeed, the development of earth civilization needs a low-end population...... It can't all be quality people. The distribution of the population, regardless of the era, is necessarily pyramidal. ”

Zhang Yuan shook his head: "Actually, on the whole, the earth civilization is still moving forward, isn't it?" As for the population problem, I believe that it can still be solved, and every era has its own problems, and it cannot be smooth sailing. ”

"I don't really believe that humanity is going to die because of the aging problem."

John replied, "Zhang Yuan, you are too optimistic. So far, human beings have used greedy strategies, and when a problem arises, they will find a way to solve it, rather than prevent it from happening. ”

"This kind of decision-making system is inherently unscientific, and there is a high probability that it will enter the trap of mediocrity. Ageing is already a big problem. ”

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

In this case, he also didn't want to debate John too much, just continued reading the report below.

In order to cope with a series of problems caused by the halt of population growth, the government is constantly encouraging childbearing and introducing relevant policies.

This kind of population policy will not have much effect without decades of effort, so he directly skipped the development of the middle thirty years and turned to the latest report.

When he saw the first few lines, his spirit shook.

"Hello Earth Age colleagues! I am the new president of the Deep Space Foundation, Yuan Yuchan, and I will bring you the latest information on the earth's civilization. ”

The new president of the foundation has become a middle-aged woman, but that's nothing.

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

“…… The decipherment 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 cancers', and various malignant diseases......

"Overcoming the problem of antimicrobial resistance of superbugs is no longer a luxury!"

Great news!

Seeing this, Zhang Yuan couldn't help but sit in his seat and smile.

Below is a whole bunch of papers on the language of proteins, touching on all aspects of biology.

However, Zhang Yuan doesn't know much about biology, so he has no way to comment.

He only knows that the decipherment of protein language must be extremely important, and human beings can understand the essence of life from the most microscopic level.

As a simple example, in terms of the immune system, HIV has turned from evil to good and can help treat immunodeficiency. Some people with congenital immunodeficiency can now be cured, and this medical treatment can only be said to be a fantasy in the past!

"Life expectancy is going to increase again, I don't know if it will affect the marriage rate." Zhang Yuan asked with interest: "Our biologists, have you studied these new drugs?" ”

"I'm working on it." John turned his head and said, "Our current equipment is too poor to make such a life-enhancing drug for the time being...... The next big year, there's a life sciences conference, but it's not the two of us. We're not biologists. ”

"Okay." Zhang Yuan shook his head, anyway, he was still young, so he didn't have to think too much about things like lifespan.

The question of life and death, thinking too much is just worrying out of thin air.