Hegel, one of the founders of the deep conception of historical change broadly characteristic of nineteenth-century German scholarship, proceeded to historicize Kant’s innovation, in effect by historicizing Kant’s categories. They are not inborn, permanent, and universal; on the contrary, they are socio-historically acquired or lost and hence differ from one historical epoch to another. People living in different epochs cognize the world differently. It is tempting to read the Kuhn of Structure