[2][3] Born in Potsdam, Germany, in 1885, Wiener trained as an Arabist in Berlin and Heidelberg, spending 1909 to 1911 in the Middle East.
[10] Ruth, Eva, and Mirjam boarded a Red Cross ship, the MS Gripsholm, bound for New York, where they were reunited with their father.
[1] In 1928, Wiener was instrumental in creating the Büro Wilhelmstrasse of the CV, which documented Nazi activities and issued anti-Nazi materials until 1933, when Hitler came to power.
[4] Wiener spent most of the war years in the United States, collecting materials for the JCIO and working for the British and American governments.
Facts for the Thoughtful (1919) and German Judaism in Political, Economic and Cultural Terms (1924), were published together in an English translation as The Fatherland and the Jews in 2021.
In 1955, Wiener was awarded the highest civilian decoration of West Germany, the Grand Cross of the Order of Merit (Grosses Verdienstkreuz des Verdienstordens).