[1] The party was formed at a congress in 1971, through the merger of the Revolutionary Marxists (RM) and the Bolshevik Group (BG).

[2] At the fifth party congress, held in 1975, the name was changed to Communist Workers League (Kommunistiska Arbetarförbundet).

In the early 1990s, the party suffered a small split that went on to form the Swedish section of the Pathfinder tendency.

In 1994, a smaller group left the SP to form a Swedish section of what is now the League for the Fifth International, Workers' Power.

During the 2023 Brazilian Congress attack the organization expressed solidarity with President of Brazil Luiz Inácio Lula da Silva.