In Chinese history, the powerful Tang Dynasty established an extremely large empire, even competing with the Arab Empire at its peak. But it was such a powerful Tang Dynasty that was always threatened by a shadowy country, that is, Tubo from the Tibetan plateau.
As a result, most of the history of the Tang Dynasty was spent in the fight and peace with Tubo. Then we have a question as to why the powerful Tang Dynasty never occupied Tubo, while the later Yuan and Qing dynasties were able to incorporate Tubo into their own territory.
So today, this ancient world will tell you why Tubo after the Tang Dynasty will no longer be the brave warrior of the past.
First of all, the high temperature period of the world made the natural environment of Tibet far better than that of the Tang Dynasty and the Qing Dynasty
According to the research of Mr. Zhu Kezhen, the founder of modern Chinese meteorology, we can find a characteristic of the world's temperature change, that is, since the beginning of the ninth century, the world has entered a very special warming period.
Thanks to the rise in temperature, most of the snowy wastelands on the Qinghai-Tibet Plateau, which originally had an average altitude of about 4,000 meters, became plateau pastures with abundant water and grass, which in turn greatly increased animal husbandry and agricultural production, which in turn promoted a huge increase in the population of the plateau.
When the population and resources were sufficient, the Tubo people with altitude sickness naturally became the overlords of the plateau, which threatened the Tang Dynasty near the plateau, and even occupied the extremely important Hexi Corridor for a time.
Although the Tang Dynasty wiped out 100,000 Tubo elite soldiers in Weizhou, Sichuan in 802 AD, it led to the decline of the Tubo Dynasty. However, in the face of the towering Qinghai-Tibet Plateau, a natural barrier, it was ultimately impossible to occupy Tubo.
During the Yuan Dynasty and qing dynasty, it was the period of world temperature decline, in other plains of the mainland, this temperature decline may not have much impact, but it will be very obvious on the Qinghai-Tibet Plateau, a large number of grasslands and farmlands with abundant water and grass, gradually occupied by snow lines, the Tubo Dynasty, which lost its agricultural foundation, naturally began to embark on the road of decline.
When they faced the nomadic cavalry armies of the Yuan dynasty and the Qing Dynasty, the Tibetan plateau forces without national strength had no choice but to surrender.
Second, the rise of Tibetan Buddhism has made the inhabitants of the Tibetan homeland more yearning for peace
The power of Tibet is a powerful slavery system built on the predatory culture of the 9th century. At that time, Tibet had gone to war everywhere, attacking the Tang Dynasty, Tianzhu and Arabia, and they often plundered slaves several times their own population.
However, since the ninth century, Tubo fell into civil strife, the royal family struggle was fierce, and gradually evolved into a situation in which military generals divided the territory, which made Tubo's internal wars and chaos continuous, and the people suffered unspeakable.
It was also at this time that tibetan Buddhism, which had previously received Songtsen Gampo, gradually played its religious appeasement role, and gradually made Tubo gradually religious, and under the influence of the majority of the people converting to Tibetan Buddhism, believing in peace in their past lives, and stopping killing, Tubo gradually became more peaceful and non-aggressive.
This is one of the reasons why during the Yuan, Ming and Qing dynasties, when Tibetan Buddhism was prevalent, the Homeland of Tibet was incorporated into the rule of the Central Plains Dynasty.
epilogue
In general, the transformation of the Tibetan region is the result of the combination of time, place, and people. It is not that the Tang Dynasty is not strong, nor how strong the Yuan Dynasty and the Qing Dynasty are, the most important thing is that Tubo itself has changed, and only then has Tubo performed in different periods.
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