Overtime, how did europeans use racism to support their prejudices and preferences?

Europeans highly used the influence and apparatus of science to support their racial preferences and prejudices by viewing the culture and achievements of Asian and African people through a new kind of racism, expressed in terms of modern science. Hierarchy of races with the whites this is the result because race determined in the view that human intelligence, moral development and destiny ... Although physical differences had often been a basis of fear or dislike, in the 19th century.