The 11 essays in this volume, including a new piece by Badiou himself, reflect the traditions that shape the background of his political thought. They critically evaluate the present state of Badiou’s work, while also breaking new ground and creating new thresholds of political thought. The contributors are a range of established scholars and rising theorists of Badiou, and draw on other thinkers including Lyotard, Derrida, Lacan, Žižek, Hardt, Negri and Rancière.