what was the most significant contribution of gunnar mydral’s an American dilemma to the US civil rights movement?

The most significant contribution was definitely the inspiration that the Civil Rights movement got from it because it claimed empirically that in the end, democracy and equality will win over racism, and it was used even in court cases as a source for citations regarding verdicts. It showed many new ideas that were later used in creating affirmative action and racial integration processes.

Explanation:

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so they can differentiate themselves from others as they saw themselves as the superior race. the star was basically a symbol that meant you are a less of a person than i am because of my race. the star was also degrading for those who had to wear it because they were aware of this and the nazis used the notion to make them feel less like a person.