Answer:
During the Qing dynasty period and in at beginning of the 20th century, a handful of land owners and nobles held almost 80% of China's lands and the wealth was concentrated only on the wealthy higher class.
The working class people who were mostly peasants were left with nothing. They were unable to even satisfy their basic needs! Famine, starvation, and diseases spread every where and the rulers were unable to protect China and her interests from aggressive foreign colonial powers like Europeans, Americans and Japanese.
It is because of this immense economic and social pressure that communism became popular among the ordinary people in China.
Explanation:
The Sepoy Rebellion was mainly a rebellion against the imposing rule of the British East Indian Company in India--which many local Indians felt was both economically and morally unfair. It led to a wide-spread British reorganization of the political and military institutions in India in an effort to have more of a solidified rule.
I would suggest posting this again if not already done
In my view the period that has had the biggest impact on the development of US society is The Great Depression. That depression brought a huge economic growth but also changed mass culture that swept many Americans into consumer society.