Yes, he helped to put a break on certain revolutionary situations as it would have damaged Soviet relations with foreign powers. Yes, he was a tyrant who believed "socialism" was merely a centrally planned statified economy. Yes, his policies were detrimental to the advance of 'genuine socialism/communism' or whatever you want to call it. But do you think he genuinely believed that his way of doing things would eventually lead to a communist society? Or was this never desirable for him?