Abstract
Kantian constitutivists, like Velleman and Korsgaard, argue that there are norms internal to individual agency. Yet as Gilbert and others have argued there may be norms internal to shared agency as well. Might political principles of justice be norms of this second kind? I turn to the history of philosophy for an answer, focusing on Rousseau’s classic work the Social Contract. Rousseau is much better known as a social contract theorist – but I argue that he is also a constitutivist about group agency. This means he is a thinker for whom success or failure in realizing the demands of justice is nothing other than success or failure in acting together. Unjust regimes, e.g. despotic ones, are ones whose members fail to genuinely act together. Interpretively, this approach has the advantage of explaining away the appearance of totalitarian tendencies in Rousseau’s thinking (‘the general will is always right’). Philosophically, it has the advantage of revealing in Rousseau’s writings what I believe is a unique type of social contract theory, resolutely non-hypothetical and normatively robust. In the closing sections, I revisit the oft-raised question of Rousseau’s relation to Rawls in light of the interpretation of the former proposed here.