I believe the correct answer is: cultural relativism.
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   Franz Boas, a German-American anthropologist, established the cultural relativism in his anthropological research in 20th century and defined it as “the idea that a person's beliefs, values, and practices should be understood based on that person's own culture, rather than be judged against the criteria of another”.
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   Therefore, Max Weber saw cultural relativism as the employed kind of value neutrality in scientific study as social scientists have to make a deliberate effort to appreciate a group's ways of life in its own context without prejudice.