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, 8.25 x 5.75, personal letterhead, January 6, 1902. Untranslated notification to a colleague. In fine condition, with some loss along the torn left edge.
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