Hans Kelsen (; German: [ˈhans ˈkɛlzən]; October 11, 1881 – April 19, 1973) was an Austrian and later American jurist, legal philosopher and political philosopher. He is known principally for his theory of law, which he named the "pure theory of law (Reine Rechtslehre)", and for his writings on international law and theory of democracy. The "pure theory" provides general foundations for value-independent description of law. As an expert in constitutional law, Kelsen was the principal architect of the 1920 Austrian Constitution, which, with amendments, remains in force. The rise of totalitarianism forced him out of Austria, then to Germany and to Switzerland and in 1940 to the United States. Although in 1934 Roscoe Pound lauded Kelsen as "unquestionably the leading jurist of the time", the pure theory was rarely understood in the United States and Kelsen was never given a permanent position in a law school. He was employed in the department of politics at the University of California, Berkeley from 1942 until official retirement in 1952. He then rewrote his short book of 1934, titled Reine Rechtslehre, into a much enlarged "second edition" published in 1960; it appeared in an English translation in 1967.
Biography
Early life Kelsen was born in Prague into a middle-class, German-speaking, Jewish family. His father, Adolf Kelsen, was from Galicia, and his mother, Auguste Löwy, was from Bohemia. Hans was their first child; there were two younger brothers and a sister. The family moved to Vienna in 1884, when Hans was three years old. After graduating from the Akademisches Gymnasium, Kelsen studied law at the University of Vienna, taking his doctorate in law (Dr. juris) on 18 May 1906 and his habilitation (license to give university lectures) on 9 March 1911. Twice in his life, Kelsen converted to separate religious denominations. At the time of his dissertation on Dante and Catholicism, Kelsen was baptised as a Roman Catholic on 10 June 1905. On 25 May 1912 he married Margarete Bondi (1890–1973), the two having converted a few days earlier to Lutheranism of the Augsburg Confession; they had two daughters.
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