Jacques Derrida is the most famous philosopher of the late 20th century. Yet Derrida has undermined the rules of philosophy, rejected its methods, broken its procedures and contaminated it with literary styles of writing. Derrida's philosophy is a puzzling array of oblique, deviant and yet rigorous tactics for destabilizing texts, meanings and identities. 'Deconstruction', as these strategies have been called, is reviled and celebrated in equal measure.