The Revolutionary Shift in Kantian Modality Prior to the Critique
This chapter examines the development of Kant’s conception of modality in the period between The Only Possible Argument (1763) and the Critique of Pure Reason (1781). From the mid-1760s on, Kant interprets his discovery that existence involves a relation to the cognitive faculty as more broadly applying to modality in general, and adopts the epistemological interpretation of the actualist principle. This shift plays an essential role in Kant’s realization of the need for a ‘critical turn’ in philosophy, which Kant first formulates in his 1772 letter to Herz in terms of the question of how to cognize that our pure concepts do indeed represent really possible objects. What problematizes this question is the actualist principle, epistemologically interpreted as stating that the cognition of actuality is a prerequisite of cognition of real possibility. Kant’s emerging revolution in modality is thus constitutive of his critical turn rather than a consequence of it.