Mićo Sokolović (, 1883–1906) was the principal founder of the labour movement in Bosnia and Herzegovina. He worked as a bookbinder in Belgrade in the Kingdom of Serbia during 1903–05. He was active in the trade union of Serbian bookbinders and joined the Serbian Social Democratic Party. In May 1905, Sokolović returned to Bosnia and Herzegovina (under the rule of Austria-Hungary since 1878). He worked on organising the labour movement in Sarajevo, and under his guidance, the first trade union in Bosnia and Herzegovina was founded on 27 August 1905; it was named the General Workers' Union (Glavni radnički savez). He died of tuberculosis on 27 April 1906 in Sarajevo. Early life and activism in Serbia Mićo Sokolović was born on 21 November 1883 in the village of Sokolovići in the Rogatica district of the Condominium of Bosnia and Herzegovina, ruled by Austria-Hungary. After elementary school, he entered the gymnasium in Sarajevo in 1896. There he completed the first three grades, before he lost his stipend. His father, an impoverished tailor, sent him in 1900 to Belgrade to learn the craft of bookbinding. In August 1903, he joined the trade union of bookbinders of the Kingdom of Serbia and soon became the secretary of this organisation. Shortly afterwards, he also joined the Serbian Social Democratic Party (SSDP). He was the delegate of the bookbinders' organisation at the third congress of Serbia's trade unions, held in March 1904. During the winter of 1903–04, Sokolović attended the newly founded Workers' School (Radnička škola) in Belgrade, which was started by Radovan Dragović. Dragović was one of the founders the SSDP and the first trade union in Serbia, the General Workers' Union (Glavni radnički savez). Dragović taught about the labour movement, and the goal of his school was to create efficient socialist agitators. Activism in Bosnia and Herzegovina In Bosnia and Herzegovina, socialist ideas were first promoted in the 1860s by Bosnian Serb teacher, writer and activist Vasa Pelagić. At that time, near the end of centuries-long Ottoman rule, Bosnia and Herzegovina was a mostly agrarian and underdeveloped province. Its industrialisation began after it was occupied by Austria-Hungary in 1878. Many workers were imported to it from more developed parts of the empire. Some of them engaged in spreading socialist ideas in the province, but most of these workers were promptly expelled by Austro-Hungarian authorities, who were very vigilant against socialist agitation. Bosnia and