Background
He was born in Drammen as the son of Martin Wilhelm Kristiansen and his wife Gina, née Olsen.
He was born in Drammen as the son of Martin Wilhelm Kristiansen and his wife Gina, née Olsen.
He served as party chairman from 1931 to 1934, and then as editor-in-chief of the party organ Arbeideren from 1934 until 1940. The family settled in Nordstrand. He joined the Norges Socialdemokratiske Ungdomsforbund in 1916, but at the Labour-Communist party split in 1923, he joined the Young Communist League.
He had a brief stint as chairman of the Young Communist League in 1923.
He was removed in 1934 at the hands of Communist International. Instead, he became editor-in-chief of the official party newspaper Arbeideren.
On 9 April 1940, Norway was invaded and occupied by Nazi Germany. The Communist Party and Arbeideren originally declared themselves neutral.
On 16 August 1940, however, the Communist Party was outlawed, and the newspaper Arbeideren was shut down by the authorities.
Kristiansen was arrested, but was released shortly thereafter. Kristiansen was arrested on 22 June 1941, the same day as Operation Barbarossa commenced. In November 1941 he and Johan Strand Johansen were arrested and deported on the Steamship Donau to Hamburg.
In December he was sent to Neuengamme concentration camp, where he died in January 1942.
His urn was sent to Skien and buried there. She was sent via Ravensbrück to Auschwitz where she was murdered in a gas chamber in May 1942.
Arbeideren was not continued after the war"s end in 1945. In 1948, during the legal purge in Norway after World World War II, an indictment towards Arbeideren was considered because of the neutral alignment after 9 April 1940—however, since the editor-in-chief Kristiansen was deceased, the case was closed.
After a stay in the Soviet Union from 1929 to 1931, he returned to Norway in 1931 to become party chairman.
In 1925 he became a member of the Communist Party politburo. He continued as an underground member of the Communist Party, and is considered as the de facto party chairman during this period.