Lenin was an idealist. Unfortunately, many (if not most) idealists try to fit reality into their ideology instead of the other way around. When idealists come into power, they are ruthless in making their ideological ideas into reality.
During WWI, the many faults and failings of the Tsarist regime became evident. It didn't help that Nicholas II, a pure autocrat, was a particularly stupid man. Russia was ready for a change and, after a particularly bloody civil war, Lenin and the Bolsheviks ended up in control. Lenin did not have to institute a secret police, he just remade the Cheka into an instrument of his ideology. Unlike the American and French Revolutions, which were run from below, the Russian Revolution was imposed from above. The peasantry continued to be repressed, the bourgeousie and aristrocracy were eliminated, and one brutal regime was replaced with another.
Just as a note, Stalin wasn't an idealist like Lenin. Stalin was a paranoid, powerhungry dictator. While the results were similar, Stalin didn't have the same ideological motivation that Lenin had. Lenin thought (or hoped) that he was working for the good of the Russian people. Stalin was working to keep himself in power.
During WWI, the many faults and failings of the Tsarist regime became evident. It didn't help that Nicholas II, a pure autocrat, was a particularly stupid man. Russia was ready for a change and, after a particularly bloody civil war, Lenin and the Bolsheviks ended up in control. Lenin did not have to institute a secret police, he just remade the Cheka into an instrument of his ideology. Unlike the American and French Revolutions, which were run from below, the Russian Revolution was imposed from above. The peasantry continued to be repressed, the bourgeousie and aristrocracy were eliminated, and one brutal regime was replaced with another.
Just as a note, Stalin wasn't an idealist like Lenin. Stalin was a paranoid, powerhungry dictator. While the results were similar, Stalin didn't have the same ideological motivation that Lenin had. Lenin thought (or hoped) that he was working for the good of the Russian people. Stalin was working to keep himself in power.