He is most famously known for his economic and social theory which gave rise to Socialism and Communism. Marx's critical theories about society, economics, and politics, collectively understood as Marxism, hold that human societies develop through class conflict.
His two most well-known works are the 1848 pamphlet “The Communist Manifesto” which he wrote with his co-author and friend, Frederick Engels and the three-volume “Das Kapital”.
World of Letters
Definitive - Flowers
The 200th Anniversary of the Birth of Karl Marx, 1818-1883