EDC was initially known as the Catalan Liberal Party (PLC) and was a member of the Liberal International.[1] The PLC/EDC was also a part of the Coordinating Commission of Political Forces of Catalonia, the main pro-democracy opposition body of Catalonia at the time. The original ideology of the group was radical liberalism, including federalism, co-management and the nationalization of large enterprises.[2] In April 1976 a sector led by Jaume Casanovas split from the party and founded the Social Democratic Party of Catalonia (PSDC).[4] On 24 September 1976, together with the People's Democratic Party, the Social-Liberal Coalition was established.[5]
In December 1977, a group of party members left the party to found the Catalan Association of the Liberal Left,[11] which would end up joining Republican Left of Catalonia (ERC) in August 1978. The rest of the party would be merged into CDC in June 1978.[3][12]