by Karl Marx and Friedrich Engels

Widely considered to be the nineteenth century’s most influential revolutionary thinker, Karl Marx (1818-83) laid the theoretical foundations of modern socialism and communism. Born in Trier, Prussia (now part of Germany), Marx was educated primarily there and at the University of Berlin, receiving his doctorate in philosophy in 1841. Shortly afterward he met Friedrich Engels (1820-95), who belonged to the same circle of radical young Germans that Marx had joined as a student. Their friendship would ripen into one of history’s most fruitful intellectual collaborations, with Marx’s strong theoretical abilities complemented by Engels’s practical knowledge and organizational skills. Though living and working mainly in Britain after 1848, they wrote in their native German. Their masterpiece would be the monumental Das Kapital (“Capital,” 1867-94). Like The Communist Manifesto, Das Capital was written largely by Marx but drew...