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Hans Kelsen

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Hans Kelsen was a famous thinker who studied how laws work.

Portrait de Dante
Portrait de Dante

He was born in Prague to a Jewish family. His parents were Adolf Kelsen and Auguste Löwy. When he was three years old, his family moved to Vienna. Kelsen studied very hard at the University of Vienna. He earned his law degree in 1906. Later, he earned a special license to teach at a university. He even studied with a famous expert named Georg Jellinek.

Georg Jellinek
Georg Jellinek

Kelsen wanted to understand how rules and governments fit together.

Kelsen is most famous for his "pure theory of law." This was a way to study law without using personal feelings. He believed that law should be described on its own. He did not want people to mix law with other ideas. This theory helped people look at rules very clearly. He wrote a book about this idea in 1934. He later wrote a much larger version in 1960. This book was translated into English in 1967. His ideas helped people think about law in a new way.

Kelsen did a lot of work to help his country. In 1919, he became a professor in Vienna. A leader named Karl Renner asked him to help write a new set of rules. Kelsen helped create the 1920 Austrian Constitution. This document is still used in Austria today.

Session of the Austrian Constitutional Court, around 1925
Session of the Austrian Constitutional Court, around 1925

He was also chosen to serve on the Constitutional Court. This was a job he held for his whole life. He worked hard to make sure the laws were followed correctly.

One of Kelsen's biggest gifts was a new kind of court. He helped invent the modern European model of constitutional review. This is a special court that checks if new rules follow the main laws.

John Marshall by Henry Inman, 1832
John Marshall by Henry Inman, 1832

This model started in Austria and Czechoslovakia in 1920. Later, it was used in Germany, Italy, Spain, and Portugal. Many other countries in Europe use this system now. It is different from the system used in the United States. In the U.S., many different courts can check the laws. Kelsen's model uses one specific court for this job.

Life became very hard for Kelsen as politics changed. Unfair leaders rose to power in Europe. This forced him to leave Austria. He lived in Germany and Switzerland for a while. In 1940, he moved to the United States. He taught at the University of California, Berkeley. He worked there from 1942 until he retired in 1952. Even though he lived far from his home, his ideas about law changed the world. His work helps us understand how fair rules can work for everyone.

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🖼️ Images & Media (6)
File:Wien - Akademisches Gymnasium (1).JPG
Wien - Akademisches Gymnasium (1).JPG
Session of the Austrian Constitutional...
File:Portrait de Dante.jpg
Portrait de Dante.jpg
File:John Marshall by Henry Inman, 1832.jpg
John Marshall by Henry Inman, 1832.jpg
File:Joseph Raz - 20090224.jpg
Joseph Raz - 20090224.jpg
File:Georg Jellinek.jpg
Georg Jellinek.jpg
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