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Despite being no DNA difference, people have an predetermined notion that people of different races are different when they arn't.
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Johann Blumenbach makes destinations between different races making an hierarchical pyramid of different races putting "Caucasian" on top.This modle is highly embraced laying ground for race supremacy.
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Catogrizes people into groups including black and white.
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Changes in how people evolved chnaged making people more open to similarities between races.
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Laws restrictions the rights of African Americans
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