Firstly, the ordinary people in Russia were discontent about their circumstances ruled by an empire that was corrupt. They carried out a rebellion just before the Spring of 1917. They overthrew the Imperial government and put the Bolsheviks in power.
Although the rebellion was more political than economic, it was the peasants and working class people of Russia who revolted against the government of Tsar Nicholas II. There had been terrible losses and hardship with the failure to win WWI battles with Germany.
Then by the autumn of that same year, this provisional government had been reorganised four times. trying to remain battling on in WWI. The real needs of the peasants were not met and the Petrograd Soviet of Workers’ and Soldiers’ Deputies who were nearer to the people, were voted into power.
The 2,500 delegates to this soviet from the military in and around Petrograd won popular support to come out of the war with the Bolshevik program of “peace, land, and bread” Now the Bolsheviks and Left Socialist Revolutionaries staged a nearly bloodless coup and the provisional government were defeated and its leader, Kerensky, fled the country.