A letter containing Engels' thesis about the "colossal heap of rubbish".
Friedrich Engels' obituary for J. P. Becker, the first Swiss marxist and the father of the Swiss labor movement.
The General Rules of the Workers' 1st International, adopted by its 5th World Congress at The Hague, The Netherlands, in September 1872.
Karl Marx's first address to the Workers' 1st International following its founding conference in London, England in September 1864.
The Communist Manifesto is the birth certificate of the international communist movement.