Jacques Derrida was one of the most significant French philosophers of the 20th century. He is best remembered for developing a method of semiotic examination known as deconstruction. Derrida was a pioneer of post-structuralism and postmodern philosophy. Throughout his career, he authored more than 40 books and wrote hundreds of essays. He also published numerous articles in Tel Quel, a periodical that emphasized experimental theory. His contributions left an indelible mark on the field of philosophy. Some of his highly influential works include Of Grammatology, Writing and Difference, and Dissemination. The movement of deconstruction, which he founded, evoked equal measures of criticism and admiration and incited some of the most contentious theoretical discussions of the 20th century. Many of the theories he introduced are central to discussions in ontology, epistemology, social sciences, aesthetics, ethics, hermeneutics, art, architecture, and music. Although Derrida's approach to philosophy and his methods made him a controversial figure, he was nevertheless revered by many of his contemporaries.