[1] Brost was born in Elbing, West Prussia to a Schichau-Werke shipyard worker and a tailor.
[2] In 1915 his family moved to Danzig (modern Gdańsk, Poland), where he became a bookseller and engaged in politics and the labour movement.
[3] Brost went into exile to Poland, Sweden, Finland and Great Britain, where he worked for the BBC.
[4] He received an Allied licence to publish a newspaper in the British Zone of occupied Germany.
Brost donated the Erich-Brost-Danzig-Preis of 20,000 Euro, which is awarded to people or institutions for their merits in Polish-German reconciliation.