Christian Social Party (Belgium, 1945)

The Christian Social Party (French: Parti Social Chrétien, pronounced [paʁti sɔsjal kʁetjɛ̃],; Dutch: Christelijke Volkspartij, pronounced [ˈkrɪstələkə ˈvɔlkspɑrˌtɛi], lit. 'Christian People's Party'; generally abbreviated to PSC–CVP) was a major centre-right political party in Belgium which existed from 1945 until 1968. It is sometimes referred to as the unitary Christian Social Party (PSC unitaire/unitaire CVP) to distinguish it from its two identically named successor parties.

Established as the successor to the pre-war Catholic Party, the PSC-CVP was established after Belgium's Liberation in World War II with an explicitly "deconfessionalised" orientation in the Christian Democratic tradition. Conservative in outlook, it supported social welfare and limited economic redistribution. It remained the largest party in Belgian politics throughout much of its existence and was the last party in Belgian history to gain an outright majority in the 1950 elections. It provided a number of influential prime ministers and participated in most coalition governments in combination with the Belgian Socialist Party and the Liberal Party or its successor the Party for Freedom and Progress.

Amid rising regionalist tensions, the PSC-CVP's regional parties split along linguistic and regional lines between 1968 and 1972 to form the Francophone Christian Social Party (Parti Social Chrétien, PSC) and Flemish Christian People's Party (Christelijke Volkspartij, CVP).