Russian Social Democratic Labour Party
Some members of the party wanted democracy and were called "Mensheviks".
Other members of the party spoke for the dictatorship of the working class and were called "Bolsheviks". The leaders of the Mensheviks were Martov and Potresov. The leaders of the Bolshevik group were Plekhanov and Lenin.
The Russian Social Democratic Labour Party was an illegal party. It fought against the autocracy, organized meetings and strikes, and printed illegal newspapers blaming the Tsar and his government. Many members of the party were arrested, put into prison, or condemned to penal servitude.