Kelsen [1881-1973], was the author of more than forty works on law and legal philosophy, and is best known for this title and General Theory of Law and State. He was also the author of the Austrian Democratic Constitution, which was published in 1920, abolished during the Nazi regime, restored in 1945, and in force today. Walker calls Kelsen "possibly the most influential jurisprudent of the twentieth century." Walker, Oxford Companion to Law 699.