Lüth began his career in 1923 as an intern in the editorial staff of the Hamburger Ullstein Verlag Berlin his education.
In addition, Lüth was a member of the German Peace Society and was active in his party's pacifist wing and fell within the Young Democrats and the DDP on the basis of a call for military service in 1929.
His name is known today mainly in connection with a legal case from 1950, whose background Lüth's boycott against the film Immortal Beloved, based on the novel Aquis submersus by Theodor Storm.
In 1951, Veit Harlan sued for an injunction against Lüth for publicly calling for a boycott of Unsterbliche Geliebte(Immortal Beloved).
The District Court in Hamburg granted Harlan's suit and ordered that Lüth forbear from making such public appeals.