The Leftwing Union for the Socialist Democracy ( pt, União da Esquerda para a Democracia Socialista) was a

Portuguese Portuguese may refer to: * anything of, from, or related to the country and nation of Portugal ** Portuguese cuisine, traditional foods ** Portuguese language, a Romance language *** Portuguese dialects, variants of the Portuguese language ** Portu ...

leftwing party founded in January 1978. The party has its origins in the ''Socialist Culture Association - Worker Brotherhood'', a

socialist Socialism is a left-wing economic philosophy and movement encompassing a range of economic systems characterized by the dominance of social ownership of the means of production as opposed to private ownership. As a term, it describes the e ...

organization and in groups of independent people linked to the

Socialist Party Socialist Party is the name of many different political parties around the world. All of these parties claim to uphold some form of socialism, though they may have very different interpretations of what "socialism" means. Statistically, most of th ...

. The party participated in the legislative election of 1980 in coalition with the

and the

Independent Social Democratic Action Independent or Independents may refer to: Arts, entertainment, and media Artist groups * Independents (artist group), a group of modernist painters based in the New Hope, Pennsylvania, area of the United States during the early 1930s * Independen ...

in the

Republican and Socialist Front Republican and Socialist Front ( pt, Frente Republicana e Socialista, or FRS) was an electoral alliance in Portugal, consisting of the Socialist Party (PS), Leftwing Union for the Socialist Democracy (UEDS) and Independent Social Democratic Actio ...

. In the subsequent elections, the party's members integrated the lists of the Socialist Party. In the Presidential election of 1986 the UEDS members split, one part supporting

Mário Soares Mário Alberto Nobre Lopes Soares, GColTE, GCC, GColL (; 7 December 1924 – 7 January 2017) was a Portuguese politician, who served as prime minister of Portugal from 1976 to 1978 and from 1983 to 1985, and subsequently as the 17th presid ...

and the other supporting

Maria de Lurdes Pintasilgo Maria de Lourdes Ruivo da Silva de Matos Pintasilgo (; 18 January 1930 – 10 July 2004) was a Portuguese chemical engineer and politician. She was the first and to date only woman to serve as Prime Minister of Portugal, and the second woman to ...

. The party was disbanded in 1986 and some of its members joined the Socialist Party.

References

Defunct socialist parties in Portugal Political parties established in 1978 Political parties disestablished in 1986 1978 establishments in Portugal 1986 disestablishments in Portugal {{Portugal-party-stub