When talking about posthumanism and its intellectual dependencies the philosophical groundwork that made it possible often tends to be neglected. In this series we'll provide an incentive to reflect upon these presuppositions by outlining the implications present in the work of premiere philosopher of modernity, Immanuel Kant, that opened up the intellectual horizon for posthumanism. In the first part we focus on Kant's groundbreaking intuitions about the nature of consciousness and its constitutive role at the heart of reality itself as both irrevocable departure from pre-modern intellectuality and necessary condition for assumptions of contemporary posthumanism. We do this by giving a broad outline of Kant's arguments from the central part of his Critique of Pure Reason - "the transcendental deduction of the categories of pure reason". In the second part we'll sketch how posthumanists rely on Kantian understanding of subject/object split for building their utopian quasi metaphysics.