 Complete the following phrase:  He joined the Russian Social Democratic Labour Party in 1903. He was also active in the Finnish labour youth movement. He was active in the 1905 Revolution working as part of the Bolshevik faction in Kronstadt. Following the defeat of the revolution, he fled to Kuopio, Finland and became active in the socialist movement there. In 1913 he returned to St Petersburg, and went on to become active amongst the Petrograd Bolsheviks. After the 