The Fourth International (FI) was a political international established in France in 1938 by Leon Trotsky and his supporters, having been expelled from the Soviet Union and the Communist International.
The Fourth International magazine
Lev Davidovich Bronstein, better known as Leon Trotsky, was a Russian revolutionary, Soviet politician, journalist, and political theorist. He was a central figure in the 1905 Revolution, October Revolution, Russian Civil War, and the establishment of the Soviet Union. Alongside Vladimir Lenin, Trotsky was widely considered the most prominent Soviet figure and was de facto second-in-command during the early years of the Russian Soviet Republic. Ideologically a Marxist and a Leninist, his thought and writings inspired a school of Marxism known as Trotskyism.
Trotsky in 1917
8-year-old Lev Bronstein, 1888
Lev Davidovich Bronstein, 1897
Trotsky's first wife Aleksandra Sokolovskaya with her brother (sitting on the left) and Trotsky (sitting on the right) in 1897