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Hans Kelsen kelsen (He was born in Praga, Czech Republic. (Praga), He…
Hans Kelsen 
He was born on October 11, 1881
He was born in Praga, Czech Republic.
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He died on April 11, 1973 in
Berkeley, United States
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He was a lawyer, judge, philosopher and university professor
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From 1917 he was a professor at the University of Vienna and in 1929 he went to Cologne University in Germany.
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In 1933 he had to leave the country because of Hitler's rise to power. He went to Geneva and then returned to Prague, but had to flee again when the Germans occupied Czechoslovakia.
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He was one of the main authors of the republican and democratic Constitution that occurred Austria in 1920, after its defeat in the First World War (1914-18) and the consequent disintegration of the Austro-Hungarian Empire.
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Between its works they emphasize Of the essence and value of the democracy (1920), General theory of the State (1925) and pure Theory of the Right (1935).
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