Francisco Nieva and Postmodernist Theatre will engage with and advance the debate on the viability of postmodernist theatre in general by presenting the works of Francisco Nieva as a bona-fide postmodernist theatre formulated on avant-garde foundations. The study will also redefine the existing historical boundaries of literary postmodernism by asserting Spain's role in shaping that history through the 1940s neo-avant-garde Movement, "Postismo". The author argues that Postismo is the earliest systematic manifestation in the Iberian Peninsula of literary postmodernism as we know it, a fact often ignored on account of Franco's suppression of it, and that Nieva is not only Postismo's chief proponent but also the only legitimate postist playwright.