Rousseau's paradox of how a multitude wills itself into the status of a sovereign people, by deciding to join the contract before existing as a people, with a general will to make that decision, presupposes the absence of any ultimate social grounds and the contingency of identities and structures. These presuppositions make Rousseau an unacknowledged precursor of Laclau's post-structuralist politics, refuting the view that Rousseau's politics seeks a totally transparent and harmonious state beyond the questioning and ambiguity defining the political. (...) The people's will grounds the social contract's legitimacy but that will lacks any pre-constituted form and clear guidelines for discerning it. It provides a groundless ground. Rousseau's legislator supplements that lack, representing the people in its absence, helping it frame suitable legislation. The people only requires the lawgiving representative because of its constitutive incompleteness: it thus resists full representation. If it already possessed a common will and identity, the lawgiver and the contract would become irrelevant. The undecidability of autonomy/heteronomy, representative/represented, fiction/reality highlighted by Rousseau's legislator affirms the impossibility of political closure as the condition of freedom and change. The people's incompleteness supports rather than jeopardises its sovereignty, allowing it to reconstitute itself in the open-ended quest for democracy. (shrink)