Lev Davidovich Bronstein, better known as Leon Trotsky, was a Russian revolutionary, Soviet politician, and political theorist. He was a central figure in the 1905 Revolution, October Revolution, Russian Civil War, and establishment of the Soviet Union. Trotsky, with Vladimir Lenin, was widely considered one of the two most prominent Soviet figures 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...