Final answer:
The Bolsheviks believed that a violent revolution and the establishment of a vanguard were necessary to change the capitalist system and establish a communist government.
Step-by-step explanation:
The Bolsheviks believed that a violent revolution was necessary to change the capitalist system. They argued that the workers needed a vanguard, a small group of dedicated revolutionary activists, to seize the state and take control of the economy. This vanguard would act on behalf of the workers to break the power of the capitalist state. The Bolsheviks' push for reform and violent revolution eventually led to the establishment of a communist government in Russia.