If you're asking in general then, the area has to have people who share common customs, belief and language.However, this might not entirely be true as there are some countries which have vast diversity and still portray nationalism.
Hope this helps!!
Answer: The colonists believed that the British were violating there rights
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Is that the professor's reason for not discussing Jefferson...he owned slaves? I assumed you asked the professor? I can see no reason why Jefferson shouldn't be discussed. If any other person is discussed during that time frame, well, sorry...they all owned slaves and that is an invalid excuse imo.
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