Razumnik Vasilyevich Ivanov-Razumnik (real surname - Ivanov; Разумник Васильевич Иванов-Разумник; 24 December 1878 – 9 July 1946) was a Soviet Russian writer, philosopher and literary critic, best known for his book History of Russian Social Thought (1907, in two volumes) and the series of essays on post-Revolution literary life in the Soviet Russia.

In 1912 Ivanov-Razumnik joined the staff of Narodnik magazine Zavety (Testaments) where he became the head of a literary department and friends with Sergey Mstislavsky, Victor Chernov and several other authors, members of the Socialist Revolutionary party.

[1] In 1916 Ivanov-Razumnik became the leader of a literary group (including, among others, Andrey Bely, Alexander Blok, Sergey Yesenin, Nikolay Klyuev and Olga Forsh) which later became known as Skify (Scythians), after the eponymous anthology which came out in 1917.

[4] As the SR party broken into two, he continued to actively cooperate with its left flank, for which he was arrested by Cheka in February 1919, but released on instructions from Felix Dzerhinsky.

[6] After his release he obtained work in the State Museum of Literature in Pushkin, near Leningrad (St Petersburg) and was there when the town was overrun by the German army, in September 1941.