[The Malthusian trap is essentially part of the law of the great historical cycle.

To put it simply, it is the contradiction between infinite exponential growth and finite resource growth, that is, the contradiction between infinite and finite.

From a macro perspective, the exponential growth of algae and plants, from the beginning of the biological origins, rapidly depleted the carbon dioxide resources in the air and changed the oxygen content of the atmosphere, thus triggering extinctions and the Great Ice Age, all of which did not escape the Malthusian trap.

From a historical point of view, the evolution and migration of ancient humans, the collapse and rise of feudal dynasties, and the subsequent industrial revolution are also driven by the internal driving of which we also know that in the final analysis, it is also the conflict between population growth and the means of production.

Even from a microscopic point of view, the intensity of the microbial survival war is no worse than that of humans, and antibiotics can be regarded as the ultimate killer evolved in the microorganism's own war.

The Malthusian trap is a shackle engraved into the genes of all living things, but it is also the evolution of living things, and the same is true of feudal dynasties.

The establishment of the Tang Dynasty was essentially a temporary escape from this trap, at the cost of a large number of population disappearances caused by years of war and Guangshen's generosity from the Northern Wei Dynasty to the early Tang Dynasty.

A large amount of ownerless land vacated by the disappearance of a large number of people was naturally nationalized, and the early Tang Dynasty also used this as the capital to complete the promotion of the uniform land system and the regulation of rent, thus laying the foundation for the strength of the Tang Dynasty.

Although the Dahua Reform did enhance the national strength, the central government of the Wa Kingdom exchanged part of the land of the nobles and powerful in exchange for political preferential treatment of the nobles and the powerful, so as to implement the Bantian Law that was changed according to the Juntian Law.

And the Dahua reform is also divided into fields for the slaves and maids of the nobles and heroes, and the nobles and heroes already have a large number of slaves and maids, so they will naturally not oppose the reform.

Therefore, to this day, Japanese scholars still believe that Japan after the Taika Reform did not enter the feudal era, and that it was a deformed continuation of the slave society.

The two sides of the Tang and Japanese wars were the feudal empire of Dacheng and the slave society that was deformed and continued.

In the end, the victory of the Tang Dynasty and the Tang Dynasty can be said to be deserved, because there is really no reason for the Tang Dynasty to lose.

The only pity is that every time the feudal dynasties in China climbed out of the trap, the political system evolved in the three directions of valuing agriculture and suppressing business, rectifying the rule of officials, and strengthening the power of the monarchy, and involuted infinitely in the small peasant economy.

As a result, the world has missed out on the tools that can solve the Malthusian trap.

For example, isn't the Champa rice in the Indochina Peninsula that "only takes more than 50 days from planting to harvesting" fragrant?

For example, isn't the corn of the Americas a god?

Zhang Yu UP was curious to check it out when he was doing this issue.

At present, the highest yield per mu of wheat is 1042 kg, and the highest yield of rice per mu is 1149 kg.

Corn is a real heavyweight, with the highest yield per mu of 2,576 kilograms, which is comparable to a myth to the ancients. 】

The theory of kilograms in later generations is no stranger to Kong Ming and others.

After all, the horseshoe gold sent before has already involved the conversion of weight units at this time and in the future.

Therefore, it is not complicated to calculate, Liu Bei roughly estimated it in his heart, and he deeply agreed with what this junior said:

"Can rice yield thirty-eight stones per mu?"

Liu Bei's eyeballs almost fell to the ground, because he clearly remembered that last year, the richest field in the Chengdu Plain was equipped with the method of manure, and the yield per mu was only three stones and five.

The difference between them is more than 10 times, and this comparison is too tragic.

In comparison, what trap and what the country was thrown to the edge of the sky by Liu Bei in an instant, and he couldn't take it to heart at all, after all, ......

"Could this corn really be made of jade beans? It can yield ...... per mu Eighty-five stones? ”

Zhang Fei also screamed, but You Zi couldn't believe the result calculated by himself, and after the calculation was confirmed again, the pen in Zhang Fei's hand fell to the ground with a click, and the expression on his face could no longer be controlled.

Like his brother, he was familiar with farming, so he was most impressed by the terrifying yields.

In comparison, Kong Ming was much calmer, and he still had time to sigh with Liu Ba Pang Tong beside him:

"This Champa rice and corn are both fruits, not causes."

"If it is a strategy to go to sea, there is no sextant more than a thousand years later, and going to sea depends on astronomy."

"Astronomy needs to study arithmetic, and arithmetic is scientific self-revival, so that the younger generations said before, science and technology are the primary productive forces."

Pang Tong nodded, after all, the younger generations can ascend to the sky to know the greatness of the world, they can tour the universe and observe the wonders of the universe, and farming can have such results, not to mention that they are very surprised, but they can only be said to be commonplace.

After agreeing, he and Kong Ming once again lamented the breadth of the horizon of later generations.

"Looking up at the heavens and the underworld, you can know the origin of people in the past, and you can understand the rise and fall of the past dynasties, and what you see in the future is really inhuman."

Because of this, Kong Ming's desire to study has become more urgent.

After carefully transcribing everything he saw in front of him and planning to think carefully in his spare time, Pang Tong noticed a gripping word:

"The Great Historical Cyclical Law?"

After listening to what later generations said, Pang Tong felt that he vaguely understood, but it was not transparent, and it was always like seeing flowers through a layer of fog.

Kong Ming was silent, and while moving, he said slowly:

"In the second year of the Middle Yuan Dynasty, there were 4 million households in my Han Dynasty, and the people of our Han Dynasty had reached 10 million households, and the people of our Han Dynasty had reached 10 million households, and the people of the world had doubled by more than 100 years."

"The yield per mu of the field can not increase by half a stone in the past 100 years."

On the white paper, Kong Ming only listed two sets of numbers, the number of households and the yield per mu, and at this time, he became more and more aware that this arithmetic was really useful.

After being mentioned by later generations, with only two sets of numbers, Kong Ming seemed to see a crumbling building.

After hearing this, Liu Bei also understood, staring at the two sets of numbers in a daze:

"It is difficult to increase the yield per mu, but if you open up all the fields that can be cultivated...... Not feasible! ”

Immediately, Liu Bei denied this idea, and changed color and bitterness:

"Powerful mergers, corrupt officials make chaos, the more people there are, but the less land there is, and the people lose their land, how can they not be chaotic?"

Before the Battle of Chibi, if you ask why the world is in chaos, Liu Bei can list a long list of names.

The Son of Heaven, whose prestige is gradually declining, is a traitor and misleads the country, sets off the horns of the anti-flag, Dong Zhuo, who wields dictatorship, and Cao Thief, who coerces the Son of Heaven.

But now that I have seen a lot and think of this problem again, these names have been slowly crossed out from Liu Bei's heart.

Especially Zhang Jiao, what's wrong? Han doesn't let him live, should he die in peace?

Troubled times are never messed with one person.

Clapping his hands, Liu Bei took the lead in waking everyone up from the dull atmosphere:

"When a husband is born, he should be peaceful!"

"Now that we know the reason of the future generations, we can deal with the chaos of a hundred years, and there is no reason to give the world to the Cao thief!"

"The top priority is to take Guanzhong in the north, urge Wu Yi in the south, and send personal guards to take the rice seeds in Zhancheng after quickly determining Nanzhong!"

Everyone is no stranger to the Indochina Peninsula, isn't it Jiaozhou further south?

There is a fork in the road that leads to here, and taking this kind of rice seed that crops every 50 days is what we need to do in a hurry.

……

In the Manna Palace, Li Shimin is also a pragmatist:

"Zhao'an Southern Governor's Mansion, presenting Zhancheng rice seeds."

"If you don't offer Tang, I will take it myself!"

Regarding the reaction of the Tang Dynasty Emperor, no one in the Ganlu Hall advised him, including Wei Zheng.

Because this rice seed, which only takes 50 days from planting to harvesting, is really amazing.

On the other hand, how long does it take for the rice planted by Datang to be harvested? More than 120 days.

Wei Zheng also understood that this was what was really qualified to be called auspicious, so not only did he not persuade His Majesty to be too eager, but he even wanted to persuade His Majesty:

If he wants to dedicate himself, he may have to wait for some time, so it is better to send a team of Datang elites to obtain it in person.

However, thinking that Lingnan Road is full of miasma and difficult roads, I thought about it and gave up.

I only hope that the natives of Annam will get acquainted with each other, think about how the Eastern Turks lost their country, and then honestly offer the rice seeds and don't cause too much trouble.

After disposing of Zhancheng Rice, Li Shimin asked:

"Where is the Americas?"

This is the first time Li Shimin has heard of this name in the Americas, but according to later generations, it is probably also a huge and incomparable land with an unknown empire.

Where is Tang called Asia, where is Rome called Europe, where is America? Li Shimin was very confused.

So everyone in the Manna Hall looked to the right, and there were two huge maps hanging there.

One is a detailed map, from Rome in the west to the Wa Kingdom in the east, and from the Hanhai Sea to the Strait of Malacca in the north, depicting a part of the earth, and nothing is known outside the map.

The other is the outline of the earth, which rotates slowly on the light curtain, but disappears before it can complete a circle, and only part of it is seen.

Now I just know that there is a huge land in the south of Europe, there is also a large area of land in the southeast of Datang across a large archipelago, and there seems to be a large area along the east of Liaodong.

Therefore, Li Shimin asked directly:

"Is this America in the south of Europe or in the southeast of the Tang Dynasty?"

Du Ruhui pondered for a while and said:

"Since the younger generations said that they could not escape this trap as long as they lived, then the West may have been able to get rid of it with the help of corn."

"But he also said that this corn can only be obtained by going to sea, so this America is either in the southeast of my Tang Dynasty, or it is ...... On the back of this map of the Earth? ”

The speculation was very reasonable, so Li Shimin's mind could only be temporarily extinguished.

So he casually asked, "How many kilograms are a stone in this future life?" ”

This is to compare the yield per mu of later generations with that of Tang.

Everyone looked at each other, how can this be calculated?

Then Fang Xuanling stood up and said that when the later generations said that the magic Jin book, he casually said that the 1,500 catties of the Jin Dynasty was equal to more than 300 kilograms in the later generations, and it could be converted according to the conversion.

Du Ru smiled secretly, it seems that the juniors' disparagement of the Jin book made this old friend very worried.

Fang Xuanling didn't realize it, and quickly calculated:

"Wheat yields 20 stone per mu, rice 21 and a half stones, and corn yield ...... Forty-eight and a half stones? ”

Li Shimin changed his mind in an instant:

"Be a fleet and open the sea to Tang!"

The first three days gave me the illusion that today's work can only be said to return to the familiar and torturous taste, LNG you are doing well (derogatory)

(End of chapter)