Translated by Taylor Adkins Jack Cox Matt Hare John Paetsch Robin Mackay Cecile Malaspina Dan Mellamphy Thomas Murphy Ben Woodard A collection of newly translated texts by Gilles Châtelet (1944–1999)—philosopher, political theorist, and thinker of individuation and the magnification of human freedoms, but also a talented mathematician and an original theorist of the virtual, the diagram, and the gesture. With his characteristic ebullience and speculative agility in transporting concepts between different fields, Châtelet’s polymath interrogations were an acknowledged inspiration of fellow philosophers including Gilles Deleuze and Alain Badiou. In the texts collected in this volume Châtelet explores the articulation between mathematics and physical reality, between algebra and geometry, between the operations of a finite being and the manifestations of nature. Also included in the collection are interviews with Châtelet and review articles in which he reckons with major contemporary figures including Alain Badiou, Gilles Deleuze, Roger Penrose, and René Thom. The extensive introduction by Châtelet’s former colleague Charles Alunni outlines the life and career of this ‘last romantic philosopher’ and its continuing importance for our understanding of the relations between the mathematical and the physical, the abstract and the concrete, and the politics of liberation.