Abstract
The ontology of Toni Negri, as political philosophy of the multitude, supposes a very speck relation between philosophy and politics, determined by the non-difference between the two of them, while refusing, at the same time, to make the one proceed from the other, or to médiatise them and to unite them by a third necessity. They unite there only by the univocity of freedom that registers the political-philosophical indeterminacy. Hence the difficulty of making them into a political programme, of «organizing» the multitude as a political subject. But the notion of void, concomitant this univocity and defined as the very possibility of any qualitative change, establishes the philosophical-political particularity of the negrian ontology related to 1) the deconstructionist founding of the political and democracy and 2) Alain Badiou’s ontology. Far from being incapable of presenting a politics, Negri’s void designs a way to act « doing and saying at the same time » in politics