Polish readers do not know well the vicissitudes of shaping a new morality and developing a Marxist ethics in the first years of existence of the Soviet Union. This paper is intended to fill up the gap. The author shows in what difficult conditions had Marxist philosophical research to develop in the Soviet Union of the 1920’s. In their struggle against the advocates of the old philosophical and religious tenets and combating their own weaknesses, failures and errors, Soviet Marxists laid (...) the foundations for a further development of Marxist philosophical and ethical thought and for transforming it into the ideology of the whole society. (shrink)