Why was the Russian Revolution of 1917 a Triumph for Revolutionary Socialists -What did this mean for the 20th Century?

-The Russian Empire, not experiencing really Mass Industrialisation or Democracy, and quite Backwards and Feudal, saw Lenin adapting Marx's Ideas of a Mass Movement, to make the idea of an Intellectual Vanguard Class, leading the Revolution of the Peasants -The 20th Century, from that point on, saw Revolutionary Socialists rise up in the Anti-Colonial Movement in Particular. Other Revolutions are China, Cuba, Angola, Vietnam and more.