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The term "trias politica" or "separation of powers" was coined by Charles-Louis de Secondat, baron de La Brède et de Montesquieu, an 18th century French social and political philosopher. ... The intent is to prevent the concentration of power and provide for checks and balances.
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Gutenburg's printing press was such an important invention, because before he invented it, people would either write stuff all by hand, or make some stamping system. If Gutenburg hadn't invented the printing press, we wouldn't have printers to print things out!
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Gutenburg designed the printing press in a town called Strasbourg, France. he built the actual thing in Mainz, Germany.