Movement for the Liberation of São Tomé and Príncipe – Social Democratic Party

The Movement for the Liberation of São Tomé and Príncipe – Social Democratic Party (Portuguese: Movimento de Libertação de São Tomé e Príncipe – Partido Social Democrata, abbr.MLSTP–PSD), previously known as the Committee for the Liberation of São Tomé and Príncipe, and later the Movement for the Liberation of São Tomé and Príncipe after 1972, is a social democratic political party in São Tomé and Príncipe. It is one of the main political forces in the country. The party originally started as a Marxist-Leninist guerrilla group opposed to Portuguese colonialism. It later governed the country from independence under a One-party state until 1990, with Manuel Pinto da Costa serving as president. It facilitated a democratic transition after 1990 as well as adopting social democracy and democratic socialism as its official ideology. is the current president of the party.