In the West, dragons were always depicted as evil monsters, while in China, they are depicted as a benevolent beings, semi-gods or even gods, watching over and guarding China and her descendants.
Answer:
The wars and food shortages. The abuse of power the authorities had and the distress the people were dealing with. Not enough money was being made and the people saw America as a safe haven where they could go, to make money and a better life. They were willing to work long grueling hours, they would fill jobs Americans were striking on and they would get very little money.
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The reason why North and South American societies are considered to be the most diverse in the world today is because of their History. North America, especially the United States, is an immigrant country, it received thousands of immigrants from very diverse backgrounds in the XIX century: German, Chinese, Italian, Irish, Eastern European, etc. While South America is a mixture of different races: the Spanish conquistadors had children with the native peoples like the Aztecs or the Incas, plus the black slaves that were brought from Africa.