Even though Taizong, Wu Zetian, as well as the Xuanzong that is first had policies which any ruler could maintain, their reigns had been effective due to their specific personalities and how they implemented the policies and reforms they created.
Justin Wintle writes, “In retrospect, the Tang put too great a faith in their talents that are own imperial rulers” (139). In the case of all three of the emperors, their talents that are individual never be transferred to a successor.
After the first Xuanzong’s death, the dynasty steadily declined and fell apart. Xuanzong, like many rulers before and after him, lost sight of his obligations towards the individuals and indulged his pleasures that are own their expense. The An Lushan Rebellion exemplified how totally he had lost touch with his topics and that revolt had been only feasible because the national federal government had lost the respect and control of its subjects. Historian Harold M. Tanner remarks on this:
The Tang dynasty is well-known for its territorial expansion, its great cities and palaces, its flourishing trade that is foreign its art, literary works, and spiritual life, and also for the luxurious life of its aristocrats. This power and glory ended up being feasible only as the government that is imperial grain manufacturing, labor, and armies. Whenever Tang state destroyed control of those things its power declined plus it was less in a position to cope with internal and outside crises. (172)
The last blow came because of the Huang-Chao Rebellion (874-884 CE), led by a previous federal government worker called Huang-Chao. Huang-Chao had been a salt smuggler who over and over repeatedly took the federal government’s exams to be always a bureaucrat and failed.