History has always existed, but not always in its historical form

Man, "the negative being who is solely to the extent that he suppresses Being," is one with time. Man's appropriation of his own nature is at the same time his grasp of the development of the universe. "History is itself a real part of natural history, of the transformation of nature into man" (Marx). Conversely, this "natural history" has no real existence other than through the process of human history, the only vantage point from which one can take in that historical totality (like the modern telescope whose power enables one to look back in time at the receding nebulas at the periphery of the universe). History has always existed, but not always in its historical form. The temporalization of humanity, brought about through the mediation of a society, amounts to a humanization of time. The unconscious movement of time becomes manifest and true within historical consciousness.

Guy Debord, Society of the Spectacle (Soul Bay Press, 2012) p. 100

The right to the city is an empty siginifier

This poses a problem: to claim the right to the city is, in effect, to claim a right to something that no longer exists (if it ever truly did). Furthermore, the right to the city is an empty signifier. Everything depends on who gets to fill it with meaning. The financiers and developers can claim it, and have every right to do so. But then so can the homeless and the sans-papiers. We inevitably have to confront the question of whose rights are being identified, while recognizing, as Marx puts it in Capital, that "between equal rights force decides." The definition of the right is itself an object of struggle, and that struggle has to proceed concomitantly with the struggle to materialize it.

David Harvey, Rebel Cities: From the Right to the City to the Urban Revolution (Verso, 2013) p. xv

In fact, in this reading of Hegel — one affirmed by Marx himself in his own doctrine — the future is already present within the present of time: the present is already immanently the future it "ought" to have. Historical change exists, but it is systemic change; it is the movement between the great Hegelian "shapes" or Gestalten, which foreshadow later structural conceptions of the social totality, of epistemes or even modes of production.

This is not to say that such a notion of totality does not remain ambiguous: for the affirmation of the future already latent in the present can mean on the one hand that the future is already here, but waiting within the present as the statue waits to be disengaged from the sculptors block of marble; or it can simply mean that whatever future is already present in the unsubstantial subjective form of wishes and longings, never to be realized insofar as "the future never comes."

Fredric Jameson, The Hegel Variations (Verso, 2010) p. 72

The bourgeois Worker presupposes – and conditions an Entsagung, an Abnegation of human existence. Man transcends himself, surpasses himself, projects himself far away from himself by projecting himself onto the idea of private property, of Capital, which – while being the Property-owner's own product – becomes independent of him and enslaves him just as the Master enslaved the Slave; with this difference, however, that the enslavement is now conscious and freely accepted by the Worker. (We see, by the way, that for Hegel, as for Marx, the central phenomenon of the bourgeois World is not the enslavement of the working man, of the poor bourgeois, by the rich bourgeois, but the enslavement of both by Capital.)

Alexandre Kojève, Introduction to the Reading of Hegel (Cornell University Press, 1980) p. 68

On the one hand, there have started into life industrial and scientific forces which no epoch of former human history had ever suspected. On the other hand, there exist symptoms of decay, far surpassing the horrors recorded of the latter times of the Roman empire. In our days everything seems pregnant wth its contrary. Machinery, gifted with the wonderful power of shortening and fructifying human labour, we behold starving and overworking it. The newfangled sources of wealth, by some strange weird spell, are turned into sources of want. The victories of art seem bought by the loss of character. At the same time that mankind masters nature, man seems to become enslaved to other men or to his own infamy. Even the pure light of science seems unable to shine but on the dark background of ignorance. All our invention and progress seem to result in endowing material forces with intellectual life, and in stultifying human life into a material force. This antagonism between modern industry and science on the one hand, modern misery and dissolution on the other hand; this antagonism between the productive powers, and the social relations of our epoch is a fact, palpable, overwhelming, and not to be controverted.

Karl Marx, Speech at Anniversary of the People's Paper (1856)