Kurt Baschwitz

Siegfried Kurt Baschwitz (2 February 1886, Offenburg – 6 January 1968 Amsterdam), was a journalist, a professor of press, propaganda and public opinion, scholar on newspapers, and crowd psychology.

Baschwitz, who, as was customary in German middle class, was known by his second name Kurt, was a German Jew and a friend of Otto Frank, the father of Anne Frank. Baschwitz was called upon as an expert to advise on the publication of the Diary of Anne Frank and later again authenticate it. Provided by Wikipedia