Mauritania became an independent nation in November 1960. In 1964 President Moktar Ould Daddah, originally installed by the French, formalized Mauritania as a one-party state with a new constitution, setting up an authoritarian presidential regime. Daddah's own Parti du Peuple Mauritanien (PPM) became the ruling organization in a one-party system. The President justified this on the grounds that Mauritania was not ready for western-style multi-party democracy. Under this one-party constitution, Daddah was reelected in uncontested elections in 1976 and 1978.