Union of the Democratic Centre and revives the Liberal Party of his grandfather, which has participated in elections since. 2012: The Liberal Party vanished. Party of New Liberals 1977: Constantine Mitsotakis forms the Party of New Liberals which merges into New Democracy in 1978 Union of Centrists 1990: Centre (Κέντρο) is founded by George G. Papandreou, son of Georgios Papandreou. 1992: Union of Centrists (Enosi Kentroon) is founded by Vassilis Leventis and by Centre. The Liberals 1999: A short-lived libertarian party is founded by Stefanos Manos, The Liberals espousing a laissez-faire political platform, such as social liberal policies. The party was dissolved in October 2001. The party's founder cooperated with PASOK in 2004, after George Papandreou's invitation to be honorarily elected as member of the Greek parliament under PASOK's flag, and founded yet another party, "Drassi", in 2009, this time refusing to use the term "liberal" and claiming it was based upon "common sense". Liberal Alliance February 2007: Establishment of the Liberal Alliance, advocating economic and social liberal policies. Liberal leaders Liberal Party: Eleftherios Venizelos - Themistoklis Sophoulis - Sophoklis Venizelos National Progressive Union of the Centre: Nikolaos Plastiras Centre Union: Georgios Papandreou - George Mavros Union of the Democratic Center: George Mavros - Ioannis Zigdis Party of New Liberals: Constantine Mitsotakis See also History of Greece Politics of Greece List of political parties in Greece Venizelism Greece