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" "The slave is outside competition; the proletarian is in it and experiences all its vagaries.
(November 28, 1820 – August 5, 1895) was a 19th-century German philosopher, social scientist, and journalist. He created Marxist theory together with Karl Marx. In 1845, he published The Condition of the Working Class in England, based on personal observations and research in . In 1848, he co-authored The Communist Manifesto with Marx, and he also authored and co-authored (primarily with Marx) many other works. He later supported Marx financially to do research and write . After Marx's death, Engels edited the second and third volumes. Additionally, Engels organised Marx's notes on the , which he later published as the "fourth volume" of Capital.
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