This book provides a new definition of dialectical materialism. By doing this the author challenges not only the work of philosophers like Alain Badiou, Joan Copjec and Julia Kristeva but everything from popular science and quantum mechanics to sexual difference and analytic philosophy. New readings of Hegel and Kant go along with commentaries on film, politics and culture.. .The book consists of four parts. The first part outlines the fate of ontology in the 21st century, reviewing readings of Kant, Hegel, Buddha and Husserl. Part two considers different notions of sexual difference. Part three describes notions of the Möbius strip, the cross-cap and the Klein bottle. The last part recapitulates the basic motif of this book, the persistence of abstraction in its three figures (madness, sexual passion and war).