Lenin rejected repeated calls, including from some Bolsheviks, to establish a coalition government with other socialist parties. Although refusing a coalition with the Mensheviks or Socialist-Revolutionaries, Sovnarkom partially relented; they allowed the Left Socialist-Revolutionaries five posts in the cabinet in December 1917. This coalition only lasted four months until March 1918, when the Left Socialist-Revolutionaries pulled out of the government over a disagreement about the Bolsheviks' approach to ending the First World War. At their 7th Congress in March 1918, the Bolsheviks changed their official name from the Russian Social Democratic Labour Party to the Russian Communist Party, as Lenin wanted to both distance his group from the increasingly reformist German Social Democratic Party and to emphasise its ultimate goal, that of a communist society.