Marx sees Epicurus as a destroyer of the Greek myths and as a philosopher bringing to light the break-up of a tribal community. His system destroyed … - Leszek Kołakowski

Communism was not the crazy fantasy of a few fanatics, nor the result of human stupidity and baseness; it was a real, very real part of the history of the twentieth century, and we cannot understand this history of ours without understanding communism. We cannot get rid of this specter by saying it was just “human stupidity,” or “human corruptibility.” The specter is stronger than the spells we cast on it. It might come back to life.

As Commissar for the Armed Forces and a member of the Politburo he [Trotsky] still appeared powerful, but by 1923 he was isolated and helpless. All his former tergiversations were turned against him. When he came to realize his situation he attacked the bureaucratization of the party and the stifling of intra-party democracy: like all overthrown Communist leaders he became a democrat as soon as he was ousted from power. However, it was easy for Stalin and Zinovyev to show not only that Trotsky’s democratic sentiments and indignation at party bureaucracy were of recent date, but that he himself, when in power, had been a more extreme autocrat than anyone else: he had supported or initiated every move to protect party “unity”, had wanted – contrary to Lenin’s policy – to place the trade unions under state control and to subject the whole economy to the coercive power of the police, and so on. In later years Trotsky claimed that the policy, which he had supported, of prohibiting “fractions” was envisaged as an exceptional measure and not a permanent principle. But there is no proof that this was so, and nothing in the policy itself suggests that it was meant to be temporary. It may be noted that Zinovyev showed more zeal than Stalin in condemning Trotsky – at one stage he was in favour of arresting him – and thus supplied Stalin with useful ammunition when the two ousted leaders tried, belatedly and hopelessly, to join forces against their triumphant rival. (pg. 21)

While the positivists were proclaiming the end “once and for all” of unverifiable metaphysical systems and speculative philosophy in general, new doctrines in flagrant contradiction to those ideals have sprung up one after the other. Positivists see no more in this development than evidence of human stupidity, not any reflection on themselves.