Answer:
200,000 to 50,000 years ago
Answer:
Radical: Something done in a new and usual different way than any other approaches; a unique approach.
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The definition of political anthropology is the study of political systems as the basic structure of a society
Source: http://www.yourdictionary.com/political-anthropology
I believe the answer is: closure
Closure cause the members in a group to have underlying assumption that other people from outside their group would behave in the exact same way as their group do. Having this point of view would make them become unprepared when their collective view is challenged by differing opinion.