Lacanianism or Lacanian psychoanalysis is a theoretical system that explains the mind, behaviour, and culture through a structuralist and post-structuralist extension of classical psychoanalysis, initiated by the work of Jacques Lacan from the 1950s to the 1980s. Lacanian perspectives contend that the world of language, the Symbolic, structures the human mind, and stress the importance of desire, which is conceived of as endless and impossible to satisfy. Contemporary Lacanianism is characterised by a broad range of thought and extensive debate between Lacanians.