Jean-Francois Lyotard was a French philosopher. His influential book The Postmodern Condition (1979) would come to define postmodernism. He introduced the concept of “master narrative” as a critique of hegemonic forms of knowledge that attempt to construct and make sense of history. His writings span philosophy, politics, and aesthetics, all unified by a persistent view that reality consists of singular events that cannot be accurately represented. Lyotard made a substantial contribution in theatrical theory where he opposed the analytic rigidity of semiotics. Lyotard’s vision of a “theater of energies,” rather than of signs, was particularly relevant in the theoretical grounding of the concept of performance.