What monumental era caused imperialism to greatly increase? World War I, Industrial Revolution, Northwest Ordinance, or The Great Depression?

The basically got killed by the environment and white people

This concept of fate became the new meaning of "ming." so the idea of "tian ming," the mandate of heaven, was first used by the kings of the  zhou dynasty,  who  justified their overthrow of the shang by saying that heaven had punished the shang for immorality and transferred its favor to the  zhou.