Whites won early victories in 1918, but the tides turned due to Leon Trotsky
Reds were more organized and central
Allied intervention was only half hearted
Reds controlled the industry and had majority of the population
Lower classes were generally Red
Middle and uppers classes were White
Peasants were neutral
Summary
The Russian Civil war consisted of 2 groups; the 'Reds' (Bolsheviks) and the 'Whites' (all opposing groups). The Reds ended up winning the civil war because they were centralized, more organized, and liked by people.