With just common sense reasoning I can tell you that it is an easy means of identifying someone. The color of someone's skin, which covers almost their entire body, is a permanent indicator of ethnic background. It is that correlation and the unchangeableness that make it a viable identifying trait.
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yes they are Im mixed race and my IQ is 180
The purpose of the blogger is to help people to communicate with differents people and it will help people to make new friends. the main purpose of blogger is to increase the knowledge of the people by reading and writing.
Native Americans
the hidden privileges of that certain race ex. as a white person they would walk into a meeting late and people would not assume that the lateness reflects on their race
the purpose was to help the people who aboarded the ship get along and to see themselves as a group of people instead of individuals.