1. Pre-revolutionary Russia was an absolute autocracy led by Czar Nicholas II who believed he was appointed by God to rule.
2. The population was divided between the very rich and very poor serfs, who worked long hours for landlords in exchange for small housing and land, with most of their crops going to taxes.
3. Growing unrest led to riots and protests against the Csar's rule, especially after Russia's poor performance in World War I caused further hardships from casualties, shortages and an ineffective government.
4. Vladimir Lenin and the Bolsheviks seized power in 1917, overthrowing the provisional government and establishing the Soviet Union with communism.