Why do most of the dynastic changes in history be determined in the north and then in the south? Ple

Topic: Why did the North unify the South and the West unify the East? The middle and lower reaches of the Yellow River are alluvial plains of the Loess Plateau, with loose structures, which are easy to clear vegetation and cultivate when the production tools are simple and iron tools are not widely used.

Although the fertility of the Loess Alluvial Plain is not as good as that of other alluvial plains, the nutrients in the alluvial soil are still relatively sufficient under the condition that the original vegetation of the Loess Plateau is still well preserved. Although the middle reaches of the Yellow River and the Loess Plateau do not have whole areas of primeval forests like in the south, there are still many small forests, which are basically covered by sparse trees and grasslands, and soil erosion is relatively not serious. Since the lower reaches of the Yellow River and other rivers are not constrained by artificial embankments, the lower reaches of the Yellow River are inevitably flooded and diverted.

At that time, the Haihe River system had not yet been formed, and the rivers in the northern part of the North China Plain all flowed into the sea independently, so the areas affected by this flooding and diversion were quite extensive. In the coastal zone, due to the high water level, seawater intrusion and poor catharsis, the degree of land salinization is relatively serious. Therefore, the intersection of the middle and lower reaches of the Yellow River has become the best choice for the survival and reproduction of the ancestors.

According to the results of archaeological excavations and documentary records, the central areas of Xia, Shang and Zhou were the central and northern parts of today's Henan Province, the southern part of Shanxi Province, the Guanzhong Basin of Shaanxi Province, the southwestern part of Hebei Province and the western part of Shandong Province, which were the areas with the most favorable conditions in the natural environment at that time. In recent years, archaeological excavations in the Yangtze River basin, northeast China and elsewhere have raised doubts about the claim that the Yellow River basin is the cultural cradle of the Chinese nation. But from the point of view of the overall evaluation of the geographical environment, we can assert:

Although the Yellow River Basin is not the only cradle of culture in China, and although there are also developed civilizations with a long history in other regions, in general, the Yellow River Basin is the oldest, most concentrated, and most developed cultural cradle in China. It is no accident that reunification began in the Yellow River Valley. Second:

The expansionist ambitions of the ruling class! (No need to elaborate) Third: There are some laws in the whole world!

That's Feng Shui in turn! For example, once developed areas are now in ruins! As far as China is concerned, those old capitals such as Luoyang and Chang'an are not as good as today's Shenzhen and Guangzhou!

That's because the historical environment has changed, people's productive forces have developed, there are airplanes, ocean-going ships! ......Time is limited! Fourth:

The regimes or states in the South and the East are too weak to resist war.

1 Feng Shui. The king of the north is vigorous, and in ancient times, it was generally believed that sitting in the north and facing the south was respected. It is said that Qin Shi Huang used gold to suppress the southeast king's spirit.

2 Geography. The climate in the north is harsh, and the people are strong; In addition, the north is cold, and the southerners fight the northerners in terms of climate, while the northerners fight the south in winter, and it is okay in spring and autumn. There are many plains in the north, and people are easy to attack; The south is hilly and easy to guard.

3 Economy. Although the economic status declined after the Song Dynasty, the people were strong, and the economic foundation was still not weak, so the Qing Dynasty could unify the south. 4 Military.

That's man-made.

Personally, I think that from a geographical point of view, there are many plains in the north, which are easy to attack and difficult to defend, and it will be easier to form a unified situation; However, the south is full of dangerous mountains and rivers, many places are easy to defend and difficult to attack, and the southern ethnic groups are more diverse, and the customs are more difficult to tolerate, so it will be difficult to form a unity.

For there are no mountains in the north, and it is too peaceful.

The reality of the North and the South is that the comprehensive strength of the North is stronger than that of the South, and geographically speaking, the terrain of the North is high, and the army of the North can cross the Yangtze River, so the South has no major strategic precipitousness to defend, so the North unifies the South.

The north, though full of carnage, is much more widespread. The people of the Central Plains, the Xiongnu, Xianbei, the Qian, Di, the Qiang, etc., are integrated in a very broad range. This allows the integration of the northern regions to absorb the strengths and strengths of a wider range of ethnic groups.

Most of the regimes in the south prefer a corner of the country, and the south is relatively prosperous, so it has lost its enterprising spirit, so it is generally the north to unify the south.

There is an imbalance in the economic, cultural, and military development of the North and the South.

Because the Northern Dynasties were more integrated, they were more tolerant of other different ethnic groups. Moreover, the military ability of the Northern Dynasty was far superior to that of the Southern Dynasty, and the Northern Dynasties had the talent to lead troops into battle, which the Southern Dynasties did not have.