Abstract
The relation between structure and conjuncture has been one of the biggest challenges facing social theory and Louis Althusser’s writings provide some of the most important interventions on this subject. Contrary to an image of Althusser first embracing and then abandoning structuralism, Althusser tried from the beginning to articulate the theory of structural causality with an insistence on the singularity of historical conjunctures. Althusser’s theoretical trajectory, despite his shortcomings, still offers a necessary starting point for a materialist conception of the relation between structural and conjunctural determinations that stresses the complex, uneven and overdetermined character of social reality without resorting either to a ‘surface phenomena/deep structures’ dualism or to the empiricism of simply registering singular practices.