It is renowned for its introduction to the study of postmodernism in the late 1970s. Former Professor at the University of Paris VIII (Vincennes-Saint Denis), co-founder of the International College of Philosophy and professor emeritus of the University of Paris. Lyotard studied philosophy at the Sorbonne. One of his teachers was Maurice de Gandillac. He was a member of the group 'Socialisme ou Barbarie' (Socialism or Barbarism), a group comprised of the critical left intellectuals, as Castoriadis and Lefort, launched in 1956 during the uprising in Hungary in opposition to Stalinism of Soviet communism. Lyotard discussed in "Le differend" that human speech occurs in a discrete number of diverse but incommensurable domains, none of which has the privilege of spending or making value judgments about others. Accordingly, in libidinal economy (1974), The Postmodern Condition (1979) and Au juste: Conversations (1979), Lyotard attacked contemporary literary theories and experimental incited discourse devoid of excessive interest for the truth. He felt that he was already past the time of the great stories or "meta" trying to make sense of the march of history. The author criticizes the current society postmodern realism of money, that will accommodate all the trends and needs, provided they have buying power. Criticized metadiscourses: Christian, illustrated, Marxist and capitalist. According to Lyotard, incapable of leading to liberation. The postmodern culture is characterized by unbelief regarding the meta, invalidated by their practical purposes and is not currently proposing an alternative to the current system, but to act in a variety of spaces to produce concrete changes. The current criterion is technological and operational no judgment about what is true and just. Defending cultural diversity and the richness of diversity.