Rolf Jacobsen (8 March 1907 – 20 February 1994) could be said to be the first modernist writer in Norway. Jacobsen's career as a writer spanned more than fifty years. He is one of Scandinavia’s most distinguished poets, who launched poetic modernism in Norway with his first book, Jord og jern (Earth and Iron) in 1933. Jacobsen's work has been translated into over twenty languages. The central theme in his work is the balance between nature and technology – he was called "the Green Poet" in Norwegian literature.
Rolf Jacobsen was born in Oslo (then called Kristiania), as the son of Martin Julius Jacobsen, who had completed both medical and dental school, and Marie (Nielsen) Jacobsen, a nurse. At the age of six he moved with his family to Åsnes, where Martin Jacobsen had obtained a post as a school dentist. Rolf was educated by his mother, who had completed one year of teacher's training. In 1920 he moved to Oslo and entered a private school. During these years his uncle, who was a railway engineer, looked after him. Jacobson continued his studies at the University of Oslo for five years without graduating. In 1927 he served in the Norwegian army for six weeks.
From 1937 to 1939 he was a board member of Hedmark Labour Party.
Jacobsen's Jord og jern ("Earth and Iron"), written in free verse, introduced the urban world, racing cars, airplanes, and electrical turbines. Because of the choice of his subjects Jacobsen's work was connected to Marinetti and Futurism, but his view was all but romantic. He did not share the Futurists' euphoria over modern inventions, the beauty of "a roaring motorcar, which runs like a machine-gun," but saw the relationship between machines and human civilization as more complex. Jacobsen's diverse literary and other artistic influences included the Poetic Edda, Karel Čapek's play R.U.R., and Carl Sandburg's poetry. The title of the collection also suggests a cyclic relationship between nature and technology.