The efforts of humanity to recognize cultural differences have for a long time. In the early stage, it is usually to distinguish each other by concrete characteristics of Wattana, the obvious visible differences in spoken language? Costume and how life but after colonialism has spread out all over the world. Western Europeans have started to use ethnic prejudice is coming (Ethnocentrism) to distinguish very cultural. With the world's population divided into races by skin color (Race), which implied the Phantom of a hierarchy of greatness, they usually provided their own white skin is the greatest race. People of other skin colors section to reduce the priority of the rong. In the end, it produces a burgeoning popular races by skin color, or racist cult Mania (Racism), which is the cause of the tragedy in the happening until count. Countless times in history.Since 1980, etc.
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