The productivity of the notion of singularity is argued to be based on the fact that it allows us to highlight the element of individual realisation, simultaneously stressing its distance from the modern conception of individuality. The 'correlate' of singularity is the reciprocity, moving and unstable, between the 'individual' and the 'collective', which occurs in class struggles.
Using the concept singularity, drawn from French theory, Basso attempts to understand Marx's development as a search for individual realization.