Freud regarded the unconscious as a rubbish bin of repressed material that was no longer conscious; Bloch argues that it is also a creative source of material on the verge of coming to consciousness. The creativity that derives from this is expressed in a variety of ways, from simple day-dreams to the heights of artistic activity. And in so far as these expressions are expressions of hope for a better world or a better way of being in it, they are expressions of utopia. The utopian impulse is therefore a fundamental human faculty, which may take a wide variety of forms, many of which are discussed in the second volume of The Principle of Hope and which range from alchemy to opera.
For Bloch, however, these dreams of a better world are not simply a matter of compensatory fantasies, but a venturing beyond the present to a possible better future. Here, the Not Yet Conscious is linked to the Not Yet Become. Fundamental to Bloch's argument are certain assertions about the material world. It is essentially unfinished, the future is indeterminate and therefore is a realm of possibility: 'the world is full of objective real possibilities, which are not yet actual possibilities because they have not yet fulfilled all the conditions of their possibility, and may or may not ever become fully possible.’ It is the notion of real possibility which provides the link between utopia and Marxism. Bloch is critical of versions of Marxism which present it as a deterministic philosophy:
It is not sufficient to speak of dialectical process and then to treat history as a series of sequential Fixa or even closed 'totalities'. A narrowing and diminishing of reality threatens here ... and that is not Marxism.
Since the world is in a constant state of becoming, and what it is becoming is not determined, there are always many real possible futures - not all of which are desirable, since they include 'devastatingly, possible fascist Nothing' as well as, and above all, 'finally feasible and overdue, socialism'.
Ruth Levitas, “Marxism, Romanticism and Utopia: Ernst Bloch and William Morris”