(ANSA) - BELGRADE, MAY 27 - Former Greek Prime Minister Alexis Tsipras, who led Greece during the turbulent years of the debt crisis, has decided to return to politics by forming a new party called ELAS, which stands for "Coalition of the Greek Left." This party seeks to unite "the historical currents of social democracy, the radical left, and environmental movements." At a large event last night in the historic district of Thiseio, with the Acropolis in the background, Tsipras declared that the new party's goal is not just "political change, but to change the way politics is conducted," accusing Greece's two traditional parties, the conservatives of Nea Dimokratia and the socialists of Pasok, of allowing corruption to fester in institutions. (ANSA).