It was founded on 4 November 1990 by Movement for the Liberation of São Tomé and Príncipe (MLSTP) dissidents, independents, and young professionals.
The one-party period of São Tomé and Príncipe lasted from the country's independence in 1975 to 1991, when the dominant party, Movement for the Liberation of São Tomé and Príncipe – Social Democratic Party, lost in the first multiparty elections to the PCD-GR.
The party supported incumbent Fradique de Menezes in the 30 July 2006 presidential election.
In the 2011 São Toméan presidential election, Delfim Neves represented both the PCD and the Force for Change Democratic Movement – Liberal Party (MDFM-PL), the part of the previous president, Fradique de Menezes.
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