In 1979, Jean-François Lyotard published 'The Postmodern Condition', a critical examination of the state of knowledge in postmodern society. He famously defined postmodernism as 'incredulity toward metanarratives', arguing that grand narratives of progress and emancipation had lost their credibility. Lyotard's work challenged established philosophical and cultural paradigms, influencing debates in literature, art, and social theory, and marking a significant shift in contemporary thought.

Jean-François Lyotard's publication of 'The Postmodern Condition' in 1979 defined the fragmented and ironic focus of postmodern poetic voices. This rejection of universal claims in favor of micro-narratives inspired poets like Charles Bernstein and Lyn Hejinian to explore language and identity in innovative and diverse ways.