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, 5.5 x 8.75, personal letterhead, May 10, 1902. Untranslated letter to a colleague, neatly signed at the conclusion by Liebknecht. In very good to fine condition, with a rough left edge.
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