He worked at the newspapers Nyländska posten (1900–1902) and Veckans Nyheter (1902–1904) and also at Arbetaren and Helsingforsposten.

His socialistic viewpoints would be reflected in his poetry, but he also felt strong for the weakest and for the Finnish archipelago nature.

He also wrote the lyrics for the popular Swedish song "Båklandets vackra Maja" (with music composed by Hanna Hagbom).

His works would eventually become more popular after his death in Kauniainen in 1946, and today he is considered one of the prime Finnish poets of the 20th century.

[citation needed] The Arvid Mörne competition in literature is named after him and given every year by Svenska Folkskolans Vänner.