Social Christian Unity Party

The Social Christian Unity Party (Partido de Unidad Socialcristiana) is a centre-right political party in Costa Rica.

PUSC considers itself a Christian democratic party and, as such, is a member of the Christian Democrat Organization of America (ODCA). It was founded in 1983 by merger of the parties that were part of the Unity Coalition: the Christian Democratic, the Republican Calderonist, People's Union and the Democratic Renovation Party. Its historical roots are in Calderonism, i.e. the movement of supporters of Rafael Ángel Calderón Guardia, who was the country's president in the 1940s. From its foundation until 2006, the PUSC was one of Costa Rica's two dominant parties, alongside the National Liberation Party. It provided three presidents: Rafael Ángel Calderón Fournier (1990–94), Miguel Ángel Rodríguez (1998–2002) and Abel Pacheco (2002–06).