He served as Minister of Justice in the government of Hermann Müller from March to June 1920.
[1] After attending the Gymnasium in Glückstadt, Blunck studied law and the Chinese language in Berlin.
From 1904 to 1918, Blunck was a member of the Hamburg Bürgerschaft (the local parliament) for a rural area.
[1][2] In the German Revolution, he was arrested by the local radical Workers' council on 8 December 1918.
[1] After the Kapp-Lüttwitz Putsch of March 1920, Blunck became justice minister in the government of Hermann Müller (SPD).