 It was founded in 1950 by Nikolaos Plastiras, and formed a government with other Centrist parties after the 1950 elections which it contested.It later formed another coalition government after the resignation of Sofoklis Venizelos as Prime Minister, and another one in 1951 with Venizelos.After Plastiras's death in 1953, the party continued to exist, but was subsumed into the Centre Union in 1961.