The spread of Buddhism from its origins (beginnings) in Sarnath, India, throughout Asia was a major event in history. There were a number of reasons why Buddhism spread. Buddhism spread in China for religious reasons. ... The mixing of Daoism, Confucianism, and Buddhism also helped Buddhism to spread
In general, this movement had a negative impact since lots of the expansion involved moving into territories that were controlled by European nations. Although most of the time physical conflict was avoided.
That whenever any form of government becomes destructive of these ends, it is the Right of the People to alter or to abolish it.
French Revolution
American Revolution