Humanist Democratic Centre (French: Centre Démocrate Humaniste, CDH) was a Christian democratic^[11] and centrist French-speaking political party in Belgium.^[12][13] The party originated in the split in 1972 of the unitary Christian Social Party (PSC-CVP) which had been the country's governing party for much of the post-war period. It continued to be called the Christian Social Party (French: Parti Social Chrétien, PSC) until 2002 when it was renamed the Humanist Democratic Centre. It was refounded as Les Engagés in 2022.

The PSC was officially founded in 1972. The foundation was the result of the split of the unitary Christian Social Party (PSC-CVP) into the Dutch-speaking Christian People's Party (CVP) and the French-speaking Christian Social Party (PSC), following the increased linguistic tensions after the crisis at the Catholic University of Leuven in 1968. A similar split already happened in 1936 when the Catholic Bloc split into the dutchophone Catholic Flemish People's Party and francophone Catholic Social Party. The PSC performed particularly badly in the 1999 general election. This was linked to several scandals, such as the escape of Marc Dutroux and the discovery of dioxine in chickens (the PSC was a coalition partner in the Dehaene government). The decline in votes was also explained by declining adherence to Catholicism. The party was confined to opposition on all levels of government.

The party started a process of internal reform. In 2001 a new charter of principles, the "Charter of Democratic Humanism," was adopted and in 2002 the party adopted a new constitution and a new name, Humanist Democratic Centre.

In the 2003 general election the party did not perform much better and was still confined to opposition. After the 2004 regional elections the party returned to power in Brussels, in Walloon Region and the French Community together with the Socialist Party and Ecolo in Brussels, and with the Socialist Party in Walloon Region and the French Community.

In the 2007 general elections, the party won 10 out of 150 seats in the Chamber of Representatives and two out of 40 seats in the Senate.

In the 2010 general elections, the party lost one seat in the Chamber and kept its two seats in the Senate, a result which was repeated in the 2014 general elections. In the 2019 general elections the party registered its worst ever performance, winning only 5 seats and 3.7% of the vote, as well as its worst performance in the Walloon and Brussels parliaments as part of the general trend of Belgians turning away from the traditional political parties.

Its ideology was "democratic humanism, inspired by personalism inherited notably from Christian humanism" which includes a centre-left policy towards the economy, supporting state interventionism and calling for the unity of Belgium, while also containing a centre-right faction on social issues and supporting tougher measures on crime.^[14][15] Presently, the party considers itself to be a movement rather than a party, and calls for citizen-led initiatives and more engagement between the public and politicians.^[16]

CVP/PSC

• 1945–1947 August De Schryver
• 1949–1950 François-Xavier van der Straten-Waillet
• 1950–1961 Théo Lefèvre
• 1961–1966 Paul Vanden Boeynants
• 1966–1972 Robert J. Houben

PSC

• 1972–1976 Charles-Ferdinand Nothomb
• 1976–1977 Georges Gramme
• 1977–1979 Charles-Ferdinand Nothomb
• 1979–1981 Paul Vanden Boeynants
• 1981–1996 Gérard Deprez
• 1996–1998 Charles-Ferdinand Nothomb
• 1998–1999 Philippe Maystadt
• 1999–2002 Joëlle Milquet

cdH

• 2002–2011 Joëlle Milquet
• 2011–2019 Benoît Lutgen
• 2019–2022 Maxime Prévot

Until 1968 this lists gives the president of the Walloon part of the unitary CVP/PSC. The party changed its name from PSC to cdH on 18 May 2002.

• Beke, Wouter (2004). Steven Van Hecke; Emmanuel Gerard (eds.). Living Apart Together: Christian Democracy in Belgium. Leuven University Press. pp. 133–158. ISBN 90-5867-377-4. {{cite book}}: |work= ignored (help)
• Lamberts, Emiel (2004). Michael Gehler; Wolfram Kaiser (eds.). The Zenith of Christian Democracy: The Christelijke Volkspartij/Parti Social Chrétien in Belgium. Routledge. pp. 59–73. ISBN 0-7146-5662-3. {{cite book}}: |work= ignored (help)