A talented speaker and prominent personality the local politics of the Swedish capital, he was commonly nicknamed stadens kommunist ('the communist of the City').
[3] In 1936 he was included in the Central Committee and Political Bureau of the Communist Party of Sweden.
[1] The Communist Party put Olsson in charge of organizing the passages of Swedish volunteers travelling to Spain to fight in the International Brigades.
In 1946 he was elected as the chairman of the Stockholm Communist Labour Commune (i.e. the party organization in the capital).
[1][2] In local politics Olsson was mainly dedicated to culture, education and urban planning issues.