Pitirim Sorokin

Pitirim Alexandrovich Sorokin (; ; – 10 February 1968) was a Russian American sociologist and political activist, who contributed to the social cycle theory.

Sorokin was a professor at Saint Petersburg Imperial University. He was repressed by Vladimir Lenin's communist regime, which led Sorokin to flee to Czechoslovakia with the help of Thomas Masaryk and Edouard Benes. He became a professor of sociology at the University of Minnesota in 1924. In 1930, he was hired as head of the newly formed department of sociology at Harvard University.

A member of the Socialist Revolutionary Party in Russia, he was arrested multiple times by both the Czarist regime and the communist regime. Provided by Wikipedia