Born into an upper middle-class Jewish merchant family in Pest, Hungary, he began his career working for a bank for six years.
In September 1917, Holitscher attended the Third Zimmerwald Conference held in Stockholm in the capacity of a correspondent for the Viennese paper Neuen Freien Presse.
[1] In September 1919 Holitscher was invited to meet with Karl Radek at Moabit prison to discuss joining a commission to visit Russia.
The proposed commission consisted of experts in agriculture, industry, a former Secretary of State as a specialist in administration, a representative of the Radical Workers of Berlin, and the Chief of Police of a large Swiss city.
The German authorities were prepared to sanction this, however they decided to send Radek back to Russia in January 1920 and the proposed commission was shelved.