Postmodernism in literature is not an organized movement with leaders or central figures; therefore, it is more difficult to say if it has ended or when it will end (compared to, say, declaring the end of modernism with the death of Joyce or Woolf). Arguably postmodernism peaked in the 1960s and 1970s with the publication of Catch-22 in 1961, Lost in the Funhouse in 1968, Slaughterhouse-Five in 1969, and many others. Thomas Pynchon's 1973 novel Gravity's Rainbow is "often considered as the postmodern novel, redefining both postmodernism and the novel in general." 
From 1974 to 1987, Vargas Llosa focused on his writing, but also took the time to pursue other endeavors.  In 1975, he co-directed an unsuccessful motion-picture adaptation of his novel, Captain Pantoja and the Secret Service .  In 1976 he was elected President of PEN International , the worldwide association of writers and oldest human rights organisation, a position he held until 1979.  During this time, Vargas Llosa constantly traveled to speak at conferences organized by internationally renowned institutions, such as the Hebrew University of Jerusalem and the University of Cambridge , where he was Simón Bolívar Professor and an Overseas Fellow of Churchill College in 1977–78.