Jacques Lacan (1901-1980) is undoubtedly the central figure of psychoanalysis in the second half of the 20th century. He not only revolutionized the psychoanalytic practice, but in his 'return to Freud', he also deployed a global reinterpretation of the entire structural linguistics and semiotics.The influence of Lacan's work is widespread. It gave rise to passionate discussions not only in France, but also in the UK, US, Germany, Italy, Latin America, Japan and Eastern Europe, stretching beyond the field of psychoanalysis itself, to philosophy, the social sciences and cultural studies.The texts selected present the entire scope of the Lacan debate focusing on the four main domains of Lacan's influence: psychoanalytic theory and practice; philosophy; social sciences and cultural studies.