His interdisciplinary discourses covered a wide variety of related topics, like for example, the human body, knowledge and communication, modernist and post modern art and literature and music and films, time, memory, space, the city, the sublime, and the relationship between aesthetics and politics. This great French philosopher was a political activist of Marxism during the 1950's and the 1960's, but during later years, that is, during the 1980's; John Francois Lyotard became the non-Marxist philosopher of post modernistic theories. Therefore, it must be stated that postmodernist theories mark a fundamental and basic disagreement and a disengagement from the totalitarian ideals and philosophies represented by Marxism. Two of John Francois Lyotard's more important works, in which he demonstrated his experimental and his innovative thinking style are 'The Postmodern Condition' and 'The Differend'. (Jean-Francois Lyotard, French Modern Philosopher: Biography) .

             The great French philosopher Jean Francois Lyotard has been acclaimed as 'one of the foremost thinkers of the second half of the twentieth century' and his innovative and creative ideas especially in relation to the groundbreaking analyses and research that he conducted on the issue of postmodernism and post modernity. The 'Postmodern Condition, a Report on Knowledge', his work brought out in the year 1979 is today often set as a key standard text for degree courses for English, Cultural and Media Studies, and for Philosophy and Sociology, perhaps because of the fact that the work has been acclaimed and acknowledged as one of the founding texts of postmodern theory. It must be noted that in this book, as well as in other works by Jean Francois Lyotard, the author brings up important issues of politics, justice and freedom, and these lie at the very center of all his works, whether he is discussing a work of art, or a literary text, or anything else under the sun, social and ethical issues gain predominance over others.