Hungarian cold war streetsign with Karl Marx on it. After the end of communism these kind of signs were removed. This one survided. Karl Marx (1818-1883) was a German thinker and philosopher. He created the workers movement. His most important work is Das Kapital and the Communist Manifest. Bassicly he was the inventor of communism. His work and thoughts are called Marxism. Lenin was a strong believer of Marxism when he was turning Russia into the first communist state after the October Revolution in 1917. Friedrich Engels was his lifetime friend and was supporting Karl financially and publiced many of Karl Marx writings after the death of Karl.