Respuesta :
mainly came from centuries of oppression towards the lower classes by the Tsarist regime and Nicholas's failures in World War I
Answer:
The Russian Revolution of 1917 involved the collapse of an empire under Tsar Nicholas II and the rise of Marxian socialism under Lenin and his Bolsheviks. It sparked the beginning of a new era in Russia that had effects on countries around the world.
Step-by-step explanation:
the answer is technically the explanation