Leon Petrazycki

Leon Petrażycki (13 April 1867 – 15 May 1931) was a Russian and Polish philosopher, legal scholar, and sociologist, and a deputy of the first State Duma of the Russian Empire. He is regarded as an important forerunner of the sociology of law and the founder of the St. Petersburg School of Philosophy of Law. Petrażycki graduated from Kiev University in 1890 and received his doctorate from the University of St. Petersburg in 1896, where he subsequently served as a professor of philosophy of law from 1897 to 1917. In 1906, he was elected to the First Duma as a member of the Constitutional Democratic Party, but was later convicted and incarcerated for his political activities. In 1917, he was appointed to the Supreme Court of Russia but fled the country after the Bolshevik revolution. He settled in Poland and became the first professor of sociology at Warsaw University in 1919. Petrażycki was a prolific writer and a popular lecturer, but he committed suicide in 1931. His work is characterized by a focus on law as an empirical, psychological phenomenon, studied through introspection. He distinguished between 'positive law' (referring to normative facts) and 'intuitive law' (lacking such reference). He also contrasted 'official law' with 'unofficial law,' anticipating legal pluralism. Petrażycki was critical of legal positivism and is considered an early proponent of animal rights. Though influential, much of his later work was preserved only in student notes, and his contributions remain debated.