The volume "Conditions" brings together texts that emerged after Alain Badiou's 1988 magnum opus "Being and Event." Although they have very different occasions, they share a clear common direction: At the beginning lies philosophy itself and an explicit critique of the notion of its supposed end. Instead, Badiou proposes a redefinition of philosophy that aims to do justice to both its origins in Plato and its current situation. The subsequent texts discuss the four essential conditions of philosophy that give the volume its title: Poetry, Mathematics, Politics, and Love. In its clarity and relevance, this volume can serve as an introduction to Badiou's work, which François Wahl critically and knowledgeably presents in his preface.