He was born in Grue as a son of Jørgen Henrik Hegermann Brochmann (1850–1921) and Sophie Wilhelmine Dybwad (1858–1892).

[1] He was a nephew of Bertram Elias Dybwad,[2][3] and on the paternal side a first cousin of Georg Brochmann.

He formed the Samfundspartiet ("The Society Party") two years later.

Brochmann's movement touted the fundamental evils of capitalism, State power, and organized religion.

[5][6] Although Brochmann was opposed to anti-Semitism and eugenics, he gave a radio speech and published a pamphlet to rally Norwegian support for "Hitler's revolution".