The Bulgarian Social Democratic Workers' Party, (Bulgarian: Българска работническа социалдемократическа партия, BRSDP) a Bulgarian leftist group, was founded in 1894. In July 1891, on the initiative of Dimitar Blagoev, the social democratic circles of Tarnovo, Gabrovo, Sliven, Stara Zagora, Kazanlak and other cities united to form the Bulgarian Social Democratic Party. The marxist nucleus of the BSDP (later, the so-called Partists), which was headed by Blagoev, was opposed by a group, who were essentially opposed to making the social democratic movement into a party. In 1892 this group, led by Yanko Sakazov, founded a reformist organization, the Bulgarian Social Democratic Union (hence their name, Unionists). In 1894, Blagoev’s supporters agreed to unite with the Unionists in the interests