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I found this on the internet: Popular sovereignty is the principle that the authority of a state and its government are created and sustained by the consent of its people, through their elected representatives, who are the source of all political power.
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Lincoln helped America through the civil war, he signed the Emancipation Proclamation to end slavery, he tried to keep the country together. Keeping America together is so important because if sectionalism continues the U.S. may split apart. Our country would not be united, but separated.
Iron curtain the name of boundary they created to separate europe into 2 areas. this was done after wwII and the end of the cold war. the iron curtain prevents the soviets country to interact with the western country and non soviet countries in europe.
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Bankruptcy and religious wars
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