An illuminating history of Marx's thought and intellectual influence from a leading historian of socialism Why was Marx so successful as a thinker? Did he have a system and if so, what does it consist of? How did Marxism develop in the twentieth century and what does it mean today? Karl Marx remains the most influential and controversial political thinker in history. The movements associated with his name have lent hope to many victims of tyranny and aggression but have also proven disastrous in practice and resulted in the unnecessary deaths of millions. If after the collapse of the...