![Sigmund Freud: Massenpsychologie und Ich-Analyse, cover [LCID: freudl]](https://encyclopedia.ushmm.org/images/large/44585439-0792-44ee-833e-6cb3a770eaff.jpg)
Sigmund Freud: Massenpsychologie und Ich-Analyse, cover.
In 1933, Nazi students at more than 30 German universities pillaged libraries in search of books they considered to be "un-German." Among the literary and political writings they threw into the flames were all the works of Sigmund Freud that were published by 1933.
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