In the summer of 1918, he and Jumanca became involved in reestablishing Adevărul,[3] which, inspired by the Fourteen Points, became connected with the fight for emancipation of Romanians in Transylvania and Banat, and their eventual union with Romania.[3] Before the Aster Revolution, Flueraș and Jumanca were charged with contacting the Romanian National Party, negotiations which led, in early October, to the creation of Consiliul Național Român Central (CNRC, the Central Romanian National Council).[4] The CNRC was instrumental in convoking the Great National Assembly of Alba Iulia of December 1, 1918, one which declared Transylvania's secession from the Hungarian Republic, and its will to join with Romania; Flueraș was the Assembly's vice president, and subsequently served as Chief of Department of Social Security and Hygiene in the Directory Council (the de facto government of the region, led by Iuliu Maniu).[5] Among the other Social Democrats in the council were Jumanca, Albani, and Enea Grapini.
In late 1918, the Transylvanian and Banat socialists agreed to join the PS as a distinct section. In late 1919, Flueraș, Jumanca, and Ilie Moscovici carried unsuccessful negotiations for a merger between Alexandru Averescu's People's League and the Socialist groups; talks were mediated by Constantin Argetoianu.[7]
Alongside Gheorghe Cristescu, Alexandru Dobrogeanu-Gherea and others, Flueraș was a delegate to the Second Congress of the Comintern in Moscow, where the matter of the PSR's joining of the international body and its support of Bolshevik lines were debated. The Transylvanian delegates and, as a former member of the Directory Council, Flueraș first and foremost, were the target of Nikolai Bukharin and Christian Rakovsky's attacks, given that they supported a Greater Romania in front of Bolshevik principles; upon their return, Flueraș, Gheorghe Popovici, and others were expelled from the PS (despite Cristescu's reserves) — the remaining group reformed itself as the Romanian Communist Party (PCR).[8][verification needed]
In early 1945, after the royal coup that toppled Ion Antonescu's pro-Nazi regime and placed Romania in the Allies camp, Flueraș and George Grigorovici founded the Socialist Democratic Party, which claimed legitimacy inside the socialist camp and denounced collaboration with the Communists.[12] It was dissolved in September 1946.[12] Flueraș remained opposed to the main Social Democratic Party (PSD), and accused the growing Soviet influence which had found its advocates inside the latter political group (the wing led by Lothar Rădăceanu and Ștefan Voitec). He also allegedly refused office in the Communist-backed Petru Groza government, and rallied with Constantin Titel Petrescu's Independent Social Democrats, which had split with the PSD over the issue of running common lists with the communists.[1]
He was arrested in late 1948, presented as a dissident PSD member,[13] tried for "having collaborated with a fascist regime",[12] and held in various prisons inside the country, where he was routinely tortured, being ultimately murdered by two fellow inmates, Constantin Juberian and Ștefan Rek in Gherla prison (according to one testimony, he was beaten to death with sandbags).[14] Juberian was sentenced to death and executed in 1954 for the crime, while Rek was sentenced to 12 years in prison.[15]
Ioan Scurtu, "PNL și PNȚ: Rezerve, nemulțumiri, proteste. Partidele istorice sub guvernarea antonesciano-legionară" ("PNL and PNȚ: Reserves, Dissatisfactions, Protests, Historical Parties under the Antonescu-Legionary Government"), in Dosarele Istoriei, 9/2000