[1] In 1907 he joined the Social Democratic Party and was active in its workers' education company Forward.
Hausenstein, drawing inspiration from Karl Marx, defended expressionism as the social art par excellence for the future.
Hausenstein motivated Ulrich Christoffel to write art-critical reports for the Münchner Neuste Nachrichten.
After the Nazis seized power in 1933, the police forced Hausenstein's dismissal without notice as a member of the editorial board of the Münchner Neuste Nachrichten.
As a result, he lost his job at the Frankfurter Zeitung (shortly before it had to cease publication) and was henceforth subject to a ban on all journalistic work.
Hausenstein concentrated on his autobiography Lux Perpetua and prepared other books, constantly in fear that his wife Margot would get rounded up by the Nazi regime.
In 1950, at the personal request of Konrad Adenauer, he went to Paris as Consul General of the newly founded Federal Republic.