Answer:
Economic Impact of the Plague
Land was plentiful, wages high, and serfdom had all but disappeared. It was possible to move about and rise higher in life. The Black Death encouraged innovation of labor-saving technologies, leading to higher productivity. There was a shift from grain farming to animal husbandry.
Explanation:
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Lincoln meant that the country can't survive with half slavery and the other half without it. They have to come together as one nation.
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The Three Kingdoms were founded after the fall of Wiman Joseon, and gradually conquered and absorbed various other small states and confederacies. After the fall of Gojoseon, the Han dynasty established four commanderies in the Korean Peninsula and present Liaoning.