Socialist Initiative (Greek: Σοσιαλιστική Πρωτοβουλία, Sosialistiki Protovoulia) was a Greek short-lived political party founded in 1976 by former members of Centre Union – New Forces, such as Georgios-Alexandros Mangakis [el] and Dimitris Tsatsos. In 1977, it participated in Progress and Left Forces Alliance, a coalition of small left-wing parties, and dissolved a few months later. Most of its members joined PASOK.

Socialist Initiative
Σοσιαλιστική Πρωτοβουλία
FounderGeorgios-Alexandros Mangakis [el]
Founded1976
Dissolved1977
Split fromCentre Union – New Forces
IdeologySocial democracy
Democratic socialism
Political positionCenter-left
Party flag