We can see a direct linear relationship of racist ideology through the centuries, and we can follow a historical pattern of racial prejudice and hatred. This prejudice is fueled by the same underlying theory that human variation can be easily put into simple categories (racial classifications), that these categories are inherently distinct, that they can be ranked in ways that make some “races” superior to others, and that many of the most important human characteristics (such as intelligence, criminality, aggression, even the ability to navigate ships) are biologically determined and racially
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