What prompted Li Shimin to take risks and launch the Xuanwu Gate incident?

Li Shimin launched the change of Xuanwu Gate, first of all to save his life. At that time, Prince Li and Li Yuanji wanted to kill. If Li Shimin doesn't start the Xuanwumen rebellion, he may become a victim of politics. Li Shimin is the second son, but he is better than Prince Li in literature and martial arts. Everyone can think that he refuses to accept Li, but it should be surprising that he initiated the change of Xuanwu Gate. Because of this, he will succeed.

In fact, with the acquiescence of Li, Li has many supporters. In fact, he has the ability to take Tang Gaozu's place. Before the Xuanwumen rebellion, Li Biqiang. But Li Shimin's military career for so many years was not in vain. On the one hand, he has accumulated a lot of combat experience, on the other hand, he has many brothers who risk their lives. These brothers laid the foundation for him in the change of Xuanwu Gate. He himself fought against Li in the change of Xuanwu Gate, killing not only his eldest brother Li, but also his fourth brother Li Yuanji. Then he forced Li Yuan to stand on his own feet as a prince, and finally succeeded to the throne, creating a prosperous time in the Tang Dynasty.

In fact, he is more suitable to be an emperor than Li. There are inevitable reasons why history has been rewritten in this way. If Li becomes emperor, I believe that the prosperity of the Tang Dynasty will be delayed for several years or even decades. He doesn't have the courage and drive of Li Shimin, so history is sometimes wonderful.

The arrangement of the original work is not necessarily the best, but the history with episodes is the most wonderful. Moreover, this kind of sibling cannibalism is very common in history, and this is the way to compete for the throne. Either you die or I live.