German socialist and co-founder of the Spartacist League and the Communist Party of Germany (1871-1919) who is best known for his opposition to World War I and his role in the Spartacist uprising of 1919. LS in German, signed “Dr. K. Liebknecht,” one page, 8.5 x 5.75, personal letterhead, May 11, 1901. Untranslated letter to a colleague, signed at the conclusion by Liebknecht. In fine condition.
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