Democratic Party's executive committee in the district of Stockholm, and from 1900 to 1905, Dalström was the first woman to serve as a member of the executive committee of the Social Democratic Party, as well as any Swedish political party. She served as the Swedish delegate at the International Socialist Congress in Copenhagen in 1910. As a lecturer, she was initially engaged in the organizing of working-class women, but expanded to include all the spheres of the working-class movement. She placed her main focus on trade union activity, organizing the workers of the textile industry, railroad, miners and others within the trade union, as she regarded strikes as an efficient method to achieve suffrage. She was engaged in Swedish trade union work from 1898, and a member of the committee organizing the great strikes of 1905, 1908 and 1911. With her powerful agitation, she reportedly had the ability to awake great enthusiasm: her fiery, aggressive and drastic speeches made her one of the most popular and efficient agitators of the Swedish working-class movement, and her ability to excite the masses and give them courage to keep fighting during conflicts with the authorities and in the midst of disappointments, especially during the great strikes of 1902 and 1909, has been described as an unusual one. Dalström supported women's suffrage, but was never involved much in the issue because she regarded it as politically necessary to introduce full male suffrage before the issue of women's suffrage could be properly raised without damaging the transition to democracy. In 1905, she supported the dissolution of the union of Sweden-Norway. Communist Always a member of the Social Democratic movement's radical left wing, Dalström supported Branting against Hinke Bergegren because she opposed anarchism, but after Bergegren and the anarchists were defeated, she became more and more radical. She continued to believe that the class struggle of Marx and Engels was the only true way for the working-class movement to achieve its goals, and she became disappointed in the pragmatist development of the Swedish Social Democratic Party. During World War I, Dalström joined the Zimmerwald Left. She actively worked to found a new and more radical socialist party in Sweden, and in the party split of 1917 Dalström joined the Left wing, headed by Zeth Höglund, which would soon become the Communist Party, signifying a final break with the social democratic movement under Branting. She continued as