![](http://www.alamy.com/thumbs/6/09771793-9D3E-4B2B-A2D4-28B453DD0C4B/D98Y1H.jpg)
Karl Marx and Engels at the 1872 Hague Congress
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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
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Keywords: 1872, archival, archive, communism, congress, engels, hague, historical, history, karl, marx, marxism, politics, radical, socialism