People's Republic of Yugoslavia. The speeches he and Sașa Pană gave on the occasion, published by Orizont journal, were noted for condoning official positions of the PCF and the Romanian Communist Party, and are credited by Irina Livezeanu with causing a rift between Tzara and young Romanian avant-gardists such as Victor Brauner and Gherasim Luca (who rejected communism and were alarmed by the Iron Curtain having fallen over Europe). In September of the same year, he was present at the conference of the pro-communist International Union of Students (where he was a guest of the French-based Union of Communist Students, and met with similar organizations from Romania and other countries). In 1949–1950, Tzara answered Aragon's call and become active in the international campaign to liberate Nazım Hikmet, a Turkish poet whose 1938 arrest for communist activities had created a cause célèbre for the pro-Soviet public opinion. Tzara chaired the Committee for the Liberation of Nazım Hikmet, which issued petitions to national governments and commissioned works in honor of Hikmet (including musical pieces by Louis Durey and Serge Nigg). Hikmet was eventually released in July 1950, and publicly thanked Tzara during his subsequent visit to Paris. His works of the period include, among others: Le Signe de vie ("Sign of Life", 1946), Terre sur terre ("Earth on Earth", 1946), Sans coup férir ("Without a Need to Fight", 1949), De mémoire d'homme ("From a Man's Memory", 1950), Parler seul ("Speaking Alone", 1950), and La Face intérieure ("The Inner Face", 1953), followed in 1955 by À haute flamme ("Flame out Loud") and Le Temps naissant ("The Nascent Time"), and the 1956 Le Fruit permis ("The Permitted Fruit"). Tzara continued to be an active promoter of modernist culture. Around 1949, having read Irish author Samuel Beckett's manuscript of Waiting for Godot, Tzara facilitated the play's staging by approaching producer Roger Blin. He also translated into French some poems by Hikmet and the Hungarian author Attila József. In 1949, he introduced Picasso to art dealer Heinz Berggruen (thus helping start their lifelong partnership), and, in 1951, wrote the catalog for an exhibit of works by his friend Max Ernst; the text celebrated the artist's "free use of stimuli" and "his discovery of a new kind of humor." 1956 protest and final years In October 1956, Tzara visited the People's Republic of Hungary, where the government of Imre Nagy was coming into conflict with the Soviet