Answered this earlier: They were getting kicked out of their native lands, died from unfamiliar European diseases (like smallpox and measles), mistreatment and wars. <span>
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The main way in which European expansion was able to create the first global economic system is that it opened new markets and new places in which natural resources were harvested, such as North America, the Caribbean and Africa. This resulted in a "Triangle trade" of goods, slaves and exports traveling between these three points, which greatly benefitted Europe.
I think it was the Chinese civil war.
