Katarina "Kata" Dalström (18 December 1858, Emtöholm, Västervik Municipality, Kalmar County – 11 December 1923), born Anna Maria Katarina Carlberg in a wealthy upper-class family, became one of Sweden’s leading socialist agitators and leftist writers of her time. She also wrote books, mostly political texts, but also books about Norse Mythology and Viking legends.
Kata Dalström was born in to a wealthy family. Politically, Kata Dalström developed from liberalism, which was radical enough according to her family, towards Marxism and revolutionary socialism. In 1893 she joined the Swedish Social Democratic Party and was the first woman elected to the executive committee of the party in 1900. She was an outspoken supporter of Norway's right to independence from Sweden, which was proclaimed in 1905. In the question of Women suffrage, she was careful not to be to radical when the question was debated in 1905, because she was afraid that it would delay the reform of male suffrage.
One of the controversies Kata Dalström was responsible for within the Swedish Communist group was her view on religion. She wanted to see a more open approach towards Christianity, which according to her was entirely fusible with Socialism. This view was criticized, especially by the outspoken atheist Ture Nerman. Nerman was supported by Zinoviev, the leader of the Communist International, who, although a supporter of religious freedom, declared that a communist politician had to be atheist to understand Marxism.